著者

Kevin T. Mattocks Scott J. Dankel Samuel L. Buckner Matthew B. Jessee Brittany R. Counts J.Grant Mouser Gilberto C. Laurentino Jeremy P. Loenneke

出版者

Active Aging Research Center

雑誌

Journal of Trainology (ISSN:21865264)

巻号頁・発行日

vol.5, no.1, pp.6-12, 2016-04-13 (Released:2016-05-20)

参考文献数

32

被引用文献数

24

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Resistance training increases muscle size and strength and is associated with numerous health benefits. For many, periodization serves as the cornerstone of programming for resistance training and is commonly touted in the literature as a superior method of training. Objective: To review the literature on the effects of periodization for those looking to improve muscle size and strength. Design and Methods: Non-systematic review. Research articles were collected using search terms such as linear periodization, non-linear periodization, non-periodized, undulating periodization, and strength training models. Results: Previous research has found no differences in muscle size between periodized and non-periodized training programs. Further, there are conflicting reports on what periodized program is superior for increasing muscle strength. It is our contention that the proposed superiority in strength with periodized programs is often explained by the principle of specificity. Conclusion: The use of a periodized program may be advantageous for an athlete in certain sports due to practice and competi tions throughout the season. However, we wish to suggest that the proposed benefits of periodization for those only interested in increasing muscle size and strength are largely founded in conjecture and that there is little compelling evidence that periodization is a superior method of training.

著者

TAKASHI ABE YOSHIMITSU KOHMURA KOYA SUZUKI YUKI SOMEYA JEREMY P. LOENNEKE SHUICHI MACHIDA HISASHI NAITO

出版者

The Juntendo Medical Society

雑誌

順天堂醫事雑誌 (ISSN:21879737)

巻号頁・発行日

pp.JMJ23-0017-P, (Released:2023-07-24)

参考文献数

21

被引用文献数

4

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Handgrip strength as a biomarker is being studied as a factor in predicting disease onset. However, the effect of improving handgrip strength through physical exercises, such as sports during the developmental period, on disease prevention has yet to be fully elucidated. The Juntendo Fitness Plus (J-Fit Plus) Study is a unique database of anthropometric and physical fitness measurements with over 50 years of accumulated data. It has the potential to explore the effects of sports on the association between handgrip strength and morbidity/mortality. We first outline previous studies on the impact of physical exercise interventions on handgrip strength, separated into adulthood and developmental period. We then introduced a unique effort to investigate the effects of sports using the J-Fit Plus Study database and describe the challenges of finally elucidating the impact of exercise on the association between handgrip strength and health status.

著者

Robert S. Thiebaud Jeremy P. Loenneke Takashi Abe

出版者

Active Aging Research Center

雑誌

Journal of Trainology (ISSN:21865264)

巻号頁・発行日

vol.3, no.1, pp.1-5, 2014-01-07 (Released:2015-05-04)

参考文献数

57

被引用文献数

3 6

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Chronic obstructive pulmonary disease (COPD) is one of the leading causes of death in the United States and results in a significant reduction in lung function and exercise tolerance. In addition, there is a significant decline in muscle mass and strength in these individuals. Unfortunately, other comorbidities associated with this disease such as osteoporosis, osteoarthritis and obesity may prevent them from exercising at sufficiently high loads to promote muscle hypertrophy. Also, acute exacerbations may prevent them from performing exercise at all. Objectives: This brief review will discuss the potential benefits of using blood flow restriction (BFR) when combined with walking, resistance training and electrical stimulation in COPD patients and possible safety concerns. Design and Methods: Non-systematic review. Results: BFR improves muscle size and function when combined with low-intensity walking or low-load resistance training. This treatment appears to be safe and has been used by many different populations including individuals with ischaemic heart disease. For COPD patients who are contraindicated to perform exercise, a potential treatment may be to combine neuromuscular electrical stimulation with BFR. Conclusions: BFR appears to be a potential treatment for increasing strength and muscle mass for COPD patients when high intensity exercise may not be tolerated. In addition, BFR may provide benefits for COPD patients who are unable to exercise by combining it with neuromuscular electrical stimulation.

著者

Takashi Abe Jeremy P. Loenneke

出版者

理学療法科学学会

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.27, no.7, pp.2147-2149, 2015 (Released:2015-07-22)

参考文献数

11

被引用文献数

1 20

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[Purpose] It is unknown whether handgrip strength dominance is related to the size of the forearm flexor muscles. The purpose of the present study was to investigate the relationship between side-by-side differences in handgrip strength and forearm muscle thickness. [Subjects] Thirty-one young women (26 right handed and 5 left handed) between the ages of 20 and 33 years volunteered to participate. [Methods] Two muscle thicknesses (forearm-ulna and forearm-radius muscle thicknesses) were measured using B-mode ultrasound at the anterior forearm on both sides of the body. Handgrip strength was also measured on both sides. [Results] The side-by-side difference in handgrip strength was 10.2% for the right-handed group, meaning the right hand was stronger. However, the left hand of the left-handed group was 7.8% stronger compared with their right hand. There was a significant positive correlation between side-by-side differences in handgrip strength and forearm-ulna muscle thickness (r = 0.765) and between handgrip strength and forearm-radius muscle thickness (r = 0.622). [Conclusion] Our results indicate that side-by-side differences in forearm muscle size may strongly contribute to handgrip strength dominance.

著者

Takashi Abe Robert S. Thiebaud Jeremy P. Loenneke Naotoshi Mitsukawa

出版者

理学療法科学学会

雑誌

Journal of Physical Therapy Science (ISSN:09155287)

巻号頁・発行日

vol.27, no.6, pp.1893-1897, 2015 (Released:2015-06-30)

参考文献数

25

被引用文献数

10

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[Purpose] To test the hypothesis that toe grasping strength is associated with daily physical activity in older adults. [Subjects] Fifty-seven Japanese women, aged 52–78 years, volunteered. [Methods] Toe grasping and knee extension strength were measured. Physical activity was also measured, using an accelerometer, and the total duration of each level of exercise intensity (light, moderate, and vigorous) and average step counts were calculated. Subjects were separated into two groups on the basis of accelerometer-determined step counts: LOW (n=28, <8000 steps/day) and HIGH (n=29, ≥8000 steps/day). [Results] Body mass index and body composition (% fat and fat-free mass) were similar between the two groups. Absolute and relative toe grasping strengths (divided by body weight) were greater in HIGH than in LOW. However, both absolute and relative knee extension strength were similar between the groups. Relative toe grasping and knee extension strength correlated with all 3 intensities of physical activity and average step count. After adjusting for age, the duration of light plus moderate physical activity and average step counts correlated to toe grasping strength but not to knee extension strength. [Conclusion] Our results suggest that toe grasping strength may be associated with the amount of light intensity daily physical activity.

著者

Samuel L. Buckner Tayla E. Kuehne Noam Yitzchaki Wenyuan G. Zhu Megan N. Humphries Jeremy P. Loenneke

出版者

Active Aging Research Center

雑誌

Journal of Trainology (ISSN:21865264)

巻号頁・発行日

vol.8, no.1, pp.5-8, 2019-04-28 (Released:2019-06-14)

参考文献数

25

被引用文献数

12 16

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The generality of strength suggests that a “strong” individual will typically exhibit higher values of strength across a wide range of strength tasks for a given muscle relative to their weaker counterpart. This concept is often extended to adaptation, suggesting that increasing strength on a given movement or strength task with a given muscle should reflect an increase in other movements or tasks using that same muscle. The concept of a generality of strength adaptation appears less supported in the literature. Objective: To elaborate on recommendations for strength assessment, providing a focus on the “generality of strength” and the “generality of strength adaptation.”Design & Methods: We reviewed the literature on a generality of strength. In addition, we examined the resistance training lit erature to provide evidence and discussion on a generality of strength adaptation. Results/Conclusions: The generality of strength adaptation, even across strength skills using the same muscle on related movements seems quite low. Although some studies show a weak generality of strength adaptation and others show no generality of strength adaptation, it appears that increases in strength diminish as the strength assessment becomes farther removed from the actual training stimulus.