3 0 0 0 運動強度と運動時間から見た脂質代謝特性
The exercise intensity at which lipid metabolism is enhanced most and changes in lipid metabolism with time were studied during 2-hours treadmill exercise at intensities of 30, 40, 50, 60, and 70% VO2max. The subjects were 6 healthy adult males (aged 20-28 years) who exercised regularly 2-5 days a week. The exercise session was held after the subjects ingested the same lunch (a bowl of rice with meat and vegetables cooked in the Chinese style with salad; about 950 kcal) and rested for 2 hours and 30 minutes. Characteristics of lipid metabolism were examined on the basis of the plasma substrate and hormone levels, and metabolic responses. RER remained low at 30% and 40% VO2max from the beginning (0.91-0.93) to the end (0.87-0.88) of the exercise compared with the exercise intensity above 50% VO2max. The energy produced by combustion of fat, measured every 30 minutes during the exercise, increased with time at all exercise intensities, but the increases between 90 and 120 minutes were particularly notable (except at 30% VO2max). In addition, the energy derived from fat was the largest at 70% VO2max among the 5 exercise intensities 60 and 120 minutes after the beginning of the exercise with significant differences (p<0.05) compared with the other intensities. Concerning the blood substrate, glycerol mobilization and glucagon secretion increased, but the glucose level decreased characteristically, with increasing exercise were small in all parameters measured (glycerol, FFA, ketone bodies, glucose, glucagon) at all intensities, and no significant difference was observed among the intensities. However, the values of all parameters increased rapidly during the latter 60 minutes, and the increases were the largest at 70% VO2max. Also, noradrenaline was nearly doubled at 70% VO2max compared with the other intensities 60 and 120 minutes after the beginning of the exercise. From the above results, it was concluded that the energy produced by fat combustion was enhanced most at 70% VO2max. Also, it was shown to be accelerated further when exercise at 40% VO2max or above is continued for 90 minutes or longer.
- 著者
- 高尾 憲司 濱口 幹太 上野 弘聖 松生 香里 伊坂 忠夫
- 出版者
- 一般社団法人日本体力医学会
- 雑誌
- 体力科学 (ISSN:0039906X)
- 巻号頁・発行日
- vol.67, no.3, pp.227-235, 2018
<p>The purpose of this study is to considerate the prediction formula for marathon time based on 20-m shuttle run test and training indexes in recreational runners. 100 male and 111 female recreational runners who have experienced one or more marathon races were measured. Each participant was measured with regard to physical characteristics, 20-m shuttle run test, and answered questionnaires about his/her training (monthly running distance, frequency of training, and years of experience of running training). Moreover, participants self-reported their best marathon time. Additionally, to examine the validity of the prediction formula, 14 male and 13 female recreational runners were measured using the 20-m shuttle run test and they answered the questionnaires about his/her training. The marathon time was significantly correlated with the participant's BMI, the times of 20-m shuttle run test, the monthly running distance, the frequency of training and the years of experience of running training for both male and female runners. Subsequently, multiple regression analysis generated the prediction model for marathon time by the measurement items. Furthermore, in the examination of the validity of the prediction formula, predicted marathon time was significantly highly correlated with measured marathon time. This study suggested that the marathon time can be predicted by the 20-m shuttle run test, the monthly running distance, and the years of experience of running training and the predicted marathon time may be useful for the marathon race and training in recreational runners.</p>
1 0 0 0 OA マラソン競技記録と平均マラソンスピードでの酸素摂取量,固定血中乳酸濃度の関係
- 著者
- 豊岡 示朗 足立 哲司 宮原 清彰 松生 香里 福嶋 利浩 鈴木 従道
- 出版者
- 大阪体育大学
- 雑誌
- 大阪体育大学紀要 (ISSN:02891190)
- 巻号頁・発行日
- vol.31, pp.27-38, 2000-07-01
- 被引用文献数
- 1
The physiological factors that relate to marathon running performance were studied in 24 marathoners of three different categories (Elite Runners, Good Runners and Slow Runners). Oxygen uptake at average marathon speed (AMS) was significantly correlated (r = 0.93) to performance in the marathoners. This showed a significant difference in the three categories. Also, this data indicate that marathon performance of sub 2: 30 (ER) and sub 3 : 00 (GR) need respectively above 54 ml/kg/min and 45 ml/kg/min during the race. It was suggested that these differences at AMS were dependent on the difference VO_2/kg at 2.5 mM and 3.0 mM (r^2 = 82〜84%) in three categories. The two factors that contribute to VO_2/kg at 2.5 mM and 3.0 mM are: VO_2 max/kg (r = 0.83〜0.88) and average weekly distance (r = 0.64〜0.66). VO2/kg at fixed blood lactate concentration of 2.5 mM, 3.0 mM and 4.0 mM were significantly correlated to AMS (r=0.80〜0.82). There were no differences in the three categories in delta speed and V0_2/kg while increasing from 2.5 mM to 4.0 mM, which means the aerobic-anaerobic transition. The delta values were 20.8〜24.6 m/min in speed and 4.7〜5.6 ml/kg/min in V0_2. From these results, it is indicated that marathon running performance correlates closely to V0_2/ kg at AMS and velocity and V0_2/kg at fixed blood lactate concentration of 2.5 mM, 3.0 mM and 4.0 mM, which shows a significant difference in ER, GR and SR.
1 0 0 0 OA 男子長距離ランナーのOBLAスピード推定簡便法
- 著者
- 松生 香里 福嶋 利浩 和田 光代 豊岡 示朗
- 出版者
- 大阪体育大学
- 雑誌
- 大阪体育大学紀要 (ISSN:02891190)
- 巻号頁・発行日
- vol.32, pp.33-39, 2001-07-01
- 被引用文献数
- 1
The physiological factors that relate to 5000 m running performance were studied in 36 male distance runners of three different groups (14 min, 15 min and 16-17 min). Subjects underwent a test to determine the relationships among 5000 m performance (average velocity of 5000 m : V_<5000>), aerobic power, and blood lactate accumulation. The liner relationship was found to exist between V_<5000> and aerobic power (r = 0.562, p < 0.001). Also the relationship was found to exist between V_<5000> and VOBLA (r = 0.867, p < 0.001). VOBLA appeared from 90 to 101% of V_<5000> at any groups and the average of each group was about 96%. To investigate whether this result can be useful for training or not, 12 subjects were performed to run with 90, 92.5 and 95% of V_<5000> by interval training method (5 × 4 minutes running with 90 second recovery). In the 90% of V_<5000> blood lactate was steady with 3.0 mM, and it appeared around 4.0 mM in the 92.5% velocity of V_<5000>. However, in the 95% of V_<5000> blood lactate was above 4.0 mM from initial stage and was gradually increased as the trial was passed. From these results, it was suggested that 92.5% of V_<5000> was optimal velocity to lead to VOBLA.