著者

Masaki Ishikawa Kanae Sano Yoko Kunimasa Toshiaki Oda Caroline Nicol Akira Ito Paavo V Komi

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.2, no.3, pp.361-363, 2013-08-25 (Released:2013-09-08)

参考文献数

17

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The superior success of East-African endurance runners has stimulated a large amount of interest in exploring valid reasons for their performance, especially for neuromuscular mechanics. This review provides a brief overview of classic neuromuscular interaction during running; and, thereafter, describes a specific neuromuscular interaction alternative to the classic stretch-shortening cycle concept for enhancing the running economy of East-African distance runners.

著者

Shigeki Takeuchi Hirofumi Sekiguchi Kozue S Matsuzaki Makoto Miyazaki

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.2, no.3, pp.287-294, 2013-08-25 (Released:2013-09-08)

参考文献数

21

被引用文献数

1

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Despite the variability of internal and external environments, the human central nervous system (CNS) can generate precise and stable perception and motor behaviors. What mechanism enables this ability? Answering this question is one of the significant goals in the human sciences, including neuroscience, cognitive science, physical education and sports science. The Bayesian integration theory proposes that the CNS learns the prior distribution of a task and integrates it with sensory information to minimize the effect of sensory noise. In this article, we introduce psychophysical reports using motor timing and temporal order judgment (TOJ) tasks that support the Bayesian integration theory. Subsequently, we demonstrate the event-related potentials (ERPs) behind Bayesian integration that operates in somatosensory TOJ.

著者

Hajime Ohmura Atsushi Hiraga James H. Jones

出版者

一般社団法人日本体力医学会

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.2, no.2, pp.163-168, 2013-05-25 (Released:2013-06-21)

参考文献数

48

被引用文献数

3

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Thoroughbred racehorses have been selectively bred for racing for centuries. The excellent exercise capacity of Thoroughbreds is thought to depend largely on their extraordinarily high cardiopulmonary function. Their high aerobic capacity (VO2max) might be amplified by the exercise-induced hypoxemia that they experience even during submaximal exercise. In humans and horses, accumulated O2 deficit (AOD) has been the primary approach used to assess net anaerobic capacity during exercise. The exercise-induced hypoxemia Thoroughbreds experience allows an alternative approach to measuring net anaerobic energy utilization using plasma lactate accumulation rate (PLAR). Horses increase their aerobic capacity when breathing hyperoxic gas that eliminates exercise-induced hypoxemia, and PLAR decreases stoichiometrically. Relating the decrease in PLAR to the increase in VO2max yields a quantitative index of how much net aerobic power a horse is utilizing. Comparison in horses of the net anaerobic power estimated by the two methods, AOD and PLAR, shows systematic bias and suggests PLAR may be more accurate.

著者

Kazuya Tamura Yuya Ueda Takashi Saito Ryo Goto Naoki Yamada Kiyomasa Nakatsuka Kazuaki Uchida Kana Horibe Kenta Saeki Haruhi Encho Masato Tezuka Mao Mukaijo Rei Ono

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.12, no.5, pp.133-139, 2023-09-25 (Released:2023-09-13)

参考文献数

34

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Outdoor play during childhood is vital for physical, cognitive, and social development. Outdoor play is influenced by friends, though the relationship between outdoor play and the number of close friends is not clear. This study aimed to investigate the association between peer group size and outdoor play among children aged 9–12 years. This study was cross-sectional in design. We recruited fourth- to sixth-grade children from two public elementary schools. Outdoor play contents and duration on weekdays were collected via a questionnaire, and the total duration of outdoor play on five weekdays was calculated. We asked the children to nominate up to 10 of their closest friends. We calculated the peer group size as the total number of reciprocal closest friends for each child. A multivariate linear regression analysis was conducted to investigate the association between peer group size and outdoor play duration, adjusted for gender, grade, school, body mass index, sports club participation, and screen time. This study included 291 children (137 girls, mean age: 10.6 ± 1.0 years). The peer group size was associated with outdoor play duration after adjusting for confounding factors (β: 0.18, 95% CI: 0.07-0.30). This study revealed that children aged 9–12 years, with larger peer group size showed a significantly longer duration of outdoor play.

著者

Daisuke Kume

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.12, no.4, pp.95-99, 2023-07-25 (Released:2023-07-12)

参考文献数

44

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Acute mental stress can impair arterial function (e.g., arterial stiffness and endothelial function) transiently. Repeated exposures to stress-induced transient vascular dysfunction in daily life potentially leads to persistent vascular dysfunction, which increases the risk of cardiovascular disease. Therefore, it is important to devise an effective strategy to protect the vasculatures from daily stress, and exercise is one of the possible solutions. This review briefly outlines the detrimental impacts of acute mental stress on arterial function and introduces our recent research regarding exercise as a countermeasure.

著者

Hiroyo Kamio Hitoshi Maruyama Nozomi Ito Mako Kunieda Ayaka Chiba Yorimitsu Furukawa

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.1, pp.29-34, 2022-01-25 (Released:2022-01-14)

参考文献数

18

被引用文献数

1

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Pelvic floor muscle training has been reported to be effective in preventing and improving urinary incontinence. Patients must learn to perform pelvic floor muscle contractions without pushing down the pelvic floor by contracting other muscle groups. This study aimed to determine the effect of maximal-effort contraction of the hip adductor and abductor muscles on the pelvic floor of young, healthy women. For these experiments, 23 healthy nulliparous women performed unilateral maximal-effort isometric contractions of the abductor and adductor hip muscles in a supine position. Simultaneously, the movement of the bladder’s posterior surface was measured using an ultrasonic imaging device. The displacement of the bladder base during maximal-effort contraction of the hip adductor/abductor muscles was calculated based on changes in the distance between the abdominal wall and the bladder base at rest. The results demonstrated that the bladder base significantly descended during maximal-effort isometric contraction of hip adduction/abduction. The maximal-effort isometric hip adduction/abduction muscle strength positively correlated with bladder base descent. These results indicated that isometric contraction of the hip adduction/abduction muscles under maximum effort pushed the pelvic floor downward. In pelvic floor muscle training, when the adductor and abductor muscles of the hip joint are contracted with maximum effort, the pelvic floor muscles cannot learn contraction and may inhibit movement.

著者

Sho Hatanaka Naokata Ishii

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.5, pp.295-303, 2022-09-25 (Released:2022-09-13)

参考文献数

60

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This study conducted a secondary survey based on the hypothesis that the “total mechanical activation of fast-twitch fibers in the muscles determines the effects of muscle hypertrophy”, with resistance training of the knee extensor muscles as the target because of its importance in preventing sarcopenia. Using a mathematical model that estimates the mechanical activation of each muscle fiber (fast-twitch and slow-twitch fiber) during exercise, which was developed in a previous study, we estimated the total mechanical activation of fast-twitch fibers in 30 training programs described in 23 selected previous studies on leg extension exercise programs and their muscle hypertrophy effect. With the estimated value and other factors of the training effect described in previous studies (training volume, etc.) as explanatory variables and muscle hypertrophy effect as an objective variable, we performed multiple regression analysis. The results revealed that the training effect was related to total mechanical activation of the fast-twitch fibers (standardized partial regression coefficient: 0.66), training load (standardized partial regression coefficient, 0.29) and number of sets (standardized partial regression coefficient: −0.37). The total mechanical activation of fast-twitch fibers was the strongest determinant of the muscle hypertrophy effect. In addition, we predicted the relationship between the level of the training effect of leg extension exercise and program variables. This study is the first to demonstrate “the relationship between total mechanical activation of fast-twitch fibers and muscle hypertrophy effect” in the field of muscle physiology, and the first to elucidate the association between the program variables and the training effect.

著者

Jun Hamano Takayuki Shimizu Katsunori Tsuji Wendy M Kohrt Izumi Tabata

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.10, no.3, pp.129-137, 2021-05-25 (Released:2021-05-13)

参考文献数

39

被引用文献数

1 6

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Increased serum parathyroid hormone (PTH) during moderate-intensity exercise has been reported, suggesting that such exercise may stimulate bone resorption. This study was undertaken to observe the effects of exhausting high-intensity intermittent exercise (HIIE) on serum PTH and on blood parameters that may affect PTH secretion during exercise. Seven young trained adults exercised on 2 days after overnight fasting. On the HIIE day, they performed 6–7 exhausting bouts of 20-sec bicycle exercise (intensity, 170% VO2max) with intervening 10-sec rests. On the moderate-intensity exercise (MIE) day, the subjects biked for 60 min at 70% VO2max. The peak lactate concentration in blood after the HIIE was 15.2 ± 1.3 mmol/l. The blood lactate concentration at the end of the MIE was 2.2 ± 0.9 mmol/l. The HIIE significantly reduced the serum PTH (Pre: 30 ± 5 pg/ml, 10 min post-HIIE: 22 ± 4 pg/ml, p < 0.05), whereas the MIE significantly elevated the serum PTH. The HIIE induced a significant increase in serum ionized Ca (iCa); but MIE did not affect iCa. The serum cortisol concentration post-MIE was significantly higher than that observed pre-exercise; no changes from the pre-exercise value were noted post-HIIE. The serum phosphate concentration immediately post-HIIE increased significantly to the same level as that post-MIE. No changes in serum C-terminal telopeptide of Type I collagen (a marker of bone resorption) was observed after the HIIE or MIE. Although these results do not identify stimulator(s) for PTH secretion during HIIE and MIE, they indicate that HIIE does not induce an exercise-induced increase in PTH (which might deteriorate bone metabolism).

著者

Sonoko Mashimo Naruto Yoshida Takaaki Hogan Hideaki Waki Yoichi Minakawa Shogo Miyazaki Masaaki Koido

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.4, pp.237-245, 2022-07-25 (Released:2022-07-12)

参考文献数

32

被引用文献数

1

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Despite extensive studies on the incidence and characteristics of football (soccer) injuries using a time-loss definition, the exact magnitude of injuries and illnesses in football players remains unclear. This study aimed to examine the prevalence and burden of health problems among university football players based on all physical complaints. Ninety-four male university football players were prospectively followed up during the 2020 competitive season in Japan. The study period was divided into the self-training period (SP) and the football period (FP). All participants were asked to complete the Japanese version of the Oslo Sports Trauma Research Center Questionnaire on Health Problems (OSTRC-H2.JP) every Sunday. The main outcome measures were the prevalence of all health problems and substantial health problems and their burdens. The average response rate to the OSTRC-H2.JP was 88.8% [95% CI, confidence interval: 87.7%–89.9%]. Overall, the average weekly prevalence of all health problems was 19.7% [95% CI: 18.3%–21.1%]. During the FP, the average weekly prevalence of all health problems and substantial health problems were 22.9% [95% CI: 21.0%–24.7%] and 15.3% [95% CI: 13.7%–16.9%], respectively. Injuries were the main problem, with traumatic injuries in the ankle, thigh, and foot representing the greatest burden. This study indicated that approximately 20% of university football players experienced injuries or illnesses. Traumatic injuries in the ankle, thigh, and foot represented the greatest burden on self-reported reliance using broad definitions of injury and illness. Therefore, injury prevention should focus on preventing these complaints.

著者

Tomohito Sato Keisei Kosaki Youngju Choi Yuriko Tochigi Ai Shindo-Hamasaki Reiko Momma Seiji Maeda

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.4, pp.247-253, 2022-07-25 (Released:2022-07-12)

参考文献数

26

被引用文献数

1

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Several studies have demonstrated that athletes show superior performance in general cognitive functions compared to non-athletes. However, the effects on cognitive function might vary depending on the athlete’s sport type. In athletes, the visuospatial working memory is a crucial function for immediate response to each situation and experience. However, no studies have yet examined the association between visuospatial working memory and sport types. This study aimed to investigate whether sport type influences the differences in visuospatial working memory in athletes using a cross-sectional study. A total of 67 young individuals, including 59 athletes (long-distance running, tennis, kendo, and soccer players) and eight non-athletes (controls), participated in the study. Athletes were classified into static, interceptive, or strategic depending on their sport type. The reaction time, accuracy, and balanced integration score (BIS) of the spatial working memory task (SWMT) were examined in all participants. Strategic athletes showed a shorter reaction time and higher BIS value of SWMT than static athletes and non-athletes. We concluded that the visuospatial working memory of strategic athletes was better than that of non-athletes and static athletes. This finding suggests that visuospatial working memory might play an important role in determining athletic performance in strategic sport types, making improved visuospatial working memory a key advantage for strategic athletes.

著者

Hideaki Waki Masaaki Koido Yoichi Minakawa Shogo Miyazaki Naruto Yoshida

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.4, pp.213-220, 2022-07-25 (Released:2022-07-12)

参考文献数

24

被引用文献数

1

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This study aimed to observe the conditions of Japanese college athletes during the COVID-19 pandemic for the prevention of psychiatric and sleep disorders. A survey was conducted with 100 players before and after they refrained from sports activities due to the emergency measures (April 7–May 14, 2020) against COVID-19. The survey items used were the Hospital Anxiety and Depression Scale (HADS) for psychiatric symptoms (anxiety and depression) and the Pittsburgh Sleep Quality Index (PSQI) for sleep. A survey on the living conditions was based on a web-based questionnaire. Sleep dysfunction (PSQI ≥ 6), anxiety (HADS-A ≥ 8), and depression (HADS-D ≥ 8) were found in 20 (20%), 19 (19%), and 18 (18%) players before the emergency measures, and 32 (32%), 20 (20%), and 31 (31%) players after emergency measures, respectively. Of the 100 participants, 36 (36%) developed sleep dysfunction or depression as they lived alone, were anxious about school life (e.g., friendships), and were financially unstable regarding living expenses (e.g., not able to work part-time). Due to these findings, it is necessary to actively intervene in the mental health of university students.

著者

Haruki Momma

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.3, pp.175-181, 2022-05-25 (Released:2022-05-10)

参考文献数

29

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Epidemiology in the field of sports science is relatively new compared to other areas, such as exercise physiology and biomechanics; however, it is currently one of the most popular disciplines. Physical fitness has been a traditional topic in exercise (or physical activity) epidemiology since the late 1980s. In Japan, a pioneer study investigating “fitness epidemiology”, the Tokyo Gas Study, was published in 1993. Since then, however, trends in fitness epidemiology have changed and two main trends have emerged: large-scale studies and the subdivision of study objectives. An increasing number of large-scale cohort studies using fitness as an exposure variable have been published since the mid-2010s, confirming the findings reported by smaller-scale studies, but with higher external validity and robustness. Moreover, large-scale studies have enabled examination of the association between physical fitness and comprehensive health outcomes, including all-cause and disease-specific mortality and incidence of noncommunicable disease. However, researchers now must fill current knowledge gaps and develop more detailed study questions, which has resulted in a subdivision of study objectives. Accordingly, this short review addresses current trends in fitness epidemiology and introduces the author’s findings from a series of studies investigating the cumulative influence of physical fitness on the risk for lifestyle-related disease(s). In addition, it briefly discusses muscle-strengthening activity epidemiology, which has recently attracted attention as a new frontier beyond fitness epidemiology.

著者

Masamichi Okudaira Steffen Willwacher Seita Kuki Takuya Yoshida Hirohiko Maemura Satoru Tanigawa

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.10, no.2, pp.67-74, 2021-03-25 (Released:2021-03-12)

参考文献数

35

被引用文献数

1

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This study aimed to investigate the effect of incline on neuromuscular mechanisms in uphill sprint running. Nine male college sprinters performed 5-sec constant speed running trials on a motorized treadmill at 7.5 m/s. Each trial was conducted under different inclined conditions (level and 5.0% grade). Surface electromyography (EMG) was recorded from 6 muscles of the lower limbs, including gluteus maximus, gluteus medius, rectus femoris, vastus lateralis, biceps femoris, and lateral gastrocnemius lateralis. We found higher muscle activity in all muscles during the stance phase in uphill sprinting except for rectus femoris and vastus lateralis. Higher muscle activation during the recovery phase was found in the rectus femoris muscle in uphill sprinting. These muscle activity adaptations in uphill sprinting were paralleled by higher step frequency and shorter step length. Our results suggest that lower limb muscle activity can meaningfully adapt to sprint-specific demand in uphill running.

著者

Nobuaki Mizuguchi Hiroki Nakata Yusuke Uchida Kazuyuki Kanosue

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.1, no.1, pp.103-111, 2012-05-25 (Released:2012-08-22)

参考文献数

112

被引用文献数

37 75

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In the present review, how to measure motor imagery ability, brain activity during motor imagery, the benefits of motor imagery practice, and the influence of sensory inputs on motor imagery, are summarized. First, the classification of motor imagery is explained. Many methods have been utilized to evaluate motor imagery ability. For example, questionnaires, mental chronometry, and mental rotation tasks have been used in the psychological approach. Brain activity has been measured utilizing transcranial magnetic stimulation (TMS), functional magnetic resonance imaging (fMRI), positron emission tomography (PET), and electroencephalography (EEG). Some brain regions are activated motor execution in both and motor imagery, including the supplementary motor area (SMA), the premotor cortex (PM) and the parietal cortex. Although motor imagery is done without movement or muscle contraction, sensory input from the periphery interacts with motor imagery. Brain activation during imagery of an action, as assessed by TMS, is stronger when sensory inputs resemble those present during the actual execution of the action. Many studies have provided evidence of the effects of motor imagery practice on basic motor skills and sport performance. Most elite athletes (70-90%) report that they use motor imagery to improve performance, and professional players, as compared to amateurs, utilize imagery practice more often. Many studies have confirmed that motor imagery practice can also be useful not only in sports, but also for improving performance in patient rehabilitation programs.

著者

Kiyoji Tanaka Tomoaki Matsuo

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.10, no.3, pp.127-128, 2021-05-25 (Released:2021-05-13)

参考文献数

18

著者

Tatsuya Ishizu Suguru Torii Eri Takai Nozomi Miura Motoko Taguchi

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.2, pp.107-116, 2022-03-25 (Released:2022-03-14)

参考文献数

51

被引用文献数

2

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The purpose of this study was to examine whether the bone parameters and food groups consumed differ according to the energy availability (EA) status in Japanese female athletes, and to determine the relationship between calcium intake and other food groups consumption among these athletes. We investigated EA status, nutritional and food group intake, bone metabolism using biochemical analysis, and evaluated body composition and bone parameters using dual-energy X-ray absorptiometry. Fifty-two Japanese female athletes (Age: 20.0 ± 1.2 years) were enrolled in this study. Group differences between the low EA (EA < 30 kcal/kg FFM/d, n = 22) and moderate EA (EA ≥ 30 kcal/kg FFM/d, n = 30) groups were examined. Compared to the moderate EA group, the low EA group exhibited a lower daily intake of protein (g/kg BW), carbohydrate (g/kg BW), calcium (mg), grains (g), meats (g), milk and dairy products (g). Moreover, the bone resorption marker was significantly higher in the low-EA group. The daily intake of soybean products (g), vegetables (g), fish and shellfish (g) and milk and dairy products (g) correlated positively with daily calcium intake (mg). Female athletes with low EA and insufficient intake of milk and dairy products exhibited increased serum tartrate-resistant acid phosphatase 5b levels. As with milk and dairy products intake, consumption of various food groups was also significantly positively correlated with calcium intake. These findings suggest that a diet with sufficient energy and multiple food groups to provide adequate calcium may benefit bone health among Japanese female athletes.

著者

Maya Hagiwara Sonoko Mashimo Hitoshi Shiraki

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.2, pp.79-86, 2022-03-25 (Released:2022-03-14)

参考文献数

20

被引用文献数

2

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Injury can possibly change an athlete’s career. To date, few epidemiological studies have been made of amateur soccer players. More data is needed to allow medical professionals to develop realistic injury prevention and conditioning programs for the amateur level. The purpose of this study was to determine injury incidence, common injury types and body regions, and pain in amateur soccer players. Soccer-related injury and pain data were collected daily in June 2016 thorough October 2017 involving 76 amateur soccer players from two teams. Overall injury incidence was 69 injuries and 2.72/1000 player hours. Acute injuries were 52 (2.05/1000 player hours) and chronic injuries were 17 (0.67/1000 player hours). Most acute injuries occurred during a game (1.99/1000 player hours). In terms of body regions, ankle injury (27.5%) was the most common, followed by knee (15.9%), and thigh (9.0%). Pain incidence was reported 1042 (41.10/1000 player hours). The highest pain incidence was reported during a game (36.9/1000 player hours). The most common location of pain was foot/toe (5.80/1000 player hours), followed by lateral ankle (5.21/1000 player hours), anterior thigh (3.98/1000 player hours), and groin (3.27/1000 player hours). Type of injury, location of injury, and the higher incidence of injury during a game, as opposed to training, were the same as other studies. The pain incidence rate was higher than injury incidence. More epidemiological studies are needed in amateur sports to better understand athletes’ injuries and pain and be able to develop an appropriate injury prevention strategy.

著者

Jumpei Osakabe Masanobu Kajiki Ryosuke Inada Takaaki Matsumoto Yoshihisa Umemura

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.11, no.1, pp.9-19, 2022-01-25 (Released:2022-01-14)

参考文献数

27

被引用文献数

1

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Japanese collegiate and club lacrosse games are often held under environmental conditions of extreme heat in the summer. Lacrosse players are also required to wear protective equipment, which is a risk factor for heat-related illness. Nevertheless, the thermoregulatory responses of lacrosse players under such conditions are poorly understood. The present study compared the thermoregulatory responses in subjects wearing the mens’ lacrosse uniform or general athletic clothes during an exercise-simulated lacrosse match played in the heat (high temperatures). Eight men performed two experimental trials of 4 × 15-min intermittent cycling exercise in the heat (35°C, 50% relative humidity). All participants performed two trials wearing a lacrosse uniform (WEAR) or general athletic clothes (CON). The physiological strain index was significantly higher (p < 0.05) in the WEAR condition than in CON, and exceeded the high risk level for heat-related illness in WEAR during the 3rd quarter. Additionally, rectal temperature, skin temperature, heart rate, and ratings for perceived exertion, thermal sensation, and thermal comfort were significantly higher (p < 0.05) in the WEAR condition than in CON. Rectal temperature continued to increase during half-time in the WEAR condition, but not in CON (p < 0.05). These findings indicate that lacrosse players are at a higher risk of heat-related illness compared to other team sport athletes during a match because of the protective equipment worn, especially after half-time. Although further studies are required to confirm the thermoregulatory responses during an actual lacrosse match, our data will be useful in developing strategies to minimize the risk of heat-related illness.

著者

Takayuki Tajima Yoshinobu Saito Riri Kato Yayoi Kibayashi Motohiko Miyachi I-Min Lee Yuko Oguma

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.7, no.2, pp.113-119, 2018-03-25 (Released:2018-03-16)

参考文献数

29

被引用文献数

2 2

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This study describes relationships between awareness of physical activity (PA) promotion and duration of PA and sedentary behavior (SB) in elderly Japanese. Following a community-wide intervention, 874 individuals 65 years or over were selected via population-based random sampling of 3,000 adults aged 20 years or over living in Fujisawa City, and asked to complete self-administered questionnaires; 550 responded and 373 with data on pertinent variables were included. Forty-eight percent (179/373) stated that they recognized elements of the Japanese PA guidelines such as the “Active Guide” and “+10 (plus ten).” The median duration of PA, of intensity at least equal to walking, and SB among all participants were 100 minutes/day and 300 minutes/day, respectively. Duration of PA did not significantly differ by promotion awareness (Odds Ratio (OR) for ≥100 minutes/day among those aware = 1.02, 95% Confidence Interval (CI) = 0.65-1.62); however, duration of SB did (OR for <300 minutes/day = 1.60, 95% CI = 1.01-2.53). Awareness of PA promotion in elderly Japanese is related to decreased SB, but not increased PA of intensity at least equal to walking.

著者

Fumio Yamazaki Yume Araki Sayaka Takuno Ayuka Hamada

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.10, no.5, pp.255-262, 2021-09-25 (Released:2021-09-16)

参考文献数

38

被引用文献数

4

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The purpose of this study was to clarify the effect of aerobic exercise training on the coldness of the body and physiologically-related factors in Japanese young women with cold constitution. Eighteen subjects were divided into two groups: exercise (E) and non-exercise control (C) groups. Subjects in the E group performed exercise training of fast walking 4 days or more per week for 4 weeks. The training significantly decreased the scores for cold feeling in the fingertips and toes, but did not change the metabolic rate or sublingual and skin temperatures in the hands and feet during rest under normothermic conditions. In the C group, all variables remained unchanged throughout the 4-week control period. These results suggest that aerobic exercise mitigated coldness in the distal portion of the extremities via the reduction of cold sensation at a normal body temperature in young women complaining of chilliness.