Tsuchiya Yoshifumi, Ijichi Toshiaki, Goto Kazushige
Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan.
Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan.
Metabolism. 2016 Apr;65(4):492-5. doi: 10.1016/j.metabol.2015.12.006. Epub 2015 Dec 19.
Exercise twice every other day has been shown to lead to increasing peroxisome proliferator receptor γ coactivator-1α (PGC-1α) expression (up-stream factor of irisin) via lowered muscle glycogen level during second of exercise compared with exercise once daily. This study determined the influence of 4weeks of sprint training (training once daily vs. twice every other day) on the serum irisin concentration.
Twenty healthy males (20.9±1.3years) were assigned randomly to either the SINGLE or REPEATED group (n=10 per group). The subjects in the SINGLE group participated in a sprint training session once daily (5days per week), whereas those in the REPEATED group performed two consecutive training sessions on the same day with a 1-h rest between sessions (2-3days per week). Both groups completed 20 training sessions over 4weeks. Each training session consisted of three consecutive 30-s maximal pedaling exercises with a 10-min rest between sets. Blood samples were collected before and after training period (48h after completing the last training session).
The serum irisin concentration decreased significantly after training in each group (SINGLE, 338.5±77.8 to 207.6±64.6ng/mL; REPEATED, 329.5±83.9 to 234.2±72.8ng/mL, p<0.05). The plasma interleukin-6 (IL-6) concentration tended to be lower after training in both groups (main effect for period, p=0.054). However, there was no significant difference in the serum irisin or plasma IL-6 concentration between groups after training. The serum high-molecular-weight adiponectin concentration did not change significantly after training in either group.
Sprint training for 4weeks significantly decreased the resting serum irisin concentration, despite different training programs (training once daily vs. twice every other day).
与每天锻炼一次相比，隔天锻炼两次已被证明会通过在第二次锻炼期间降低肌肉糖原水平，导致过氧化物酶体增殖物激活受体γ共激活因子-1α（PGC-1α）表达增加（鸢尾素的上游因子）。本研究确定了4周短跑训练（每天训练一次与隔天训练两次）对血清鸢尾素浓度的影响。
20名健康男性（20.9±1.3岁）被随机分为单次训练组或重复训练组（每组n = 10）。单次训练组的受试者每天参加一次短跑训练（每周5天），而重复训练组的受试者在同一天进行连续两次训练，两次训练之间休息1小时（每周2 - 3天）。两组均在4周内完成20次训练。每次训练包括连续三次30秒的最大蹬踏运动，每组之间休息10分钟。在训练期之前和之后（完成最后一次训练后48小时）采集血样。
每组训练后血清鸢尾素浓度均显著降低（单次训练组，从338.5±77.8降至207.6±64.6ng/mL；重复训练组，从329.5±83.9降至234.2±72.8ng/mL，p<0.05）。两组训练后血浆白细胞介素-6（IL-6）浓度均有降低趋势（时间主效应，p = 0.054）。然而，训练后两组之间血清鸢尾素或血浆IL-6浓度无显著差异。两组训练后血清高分子量脂联素浓度均无显著变化。
尽管训练方案不同（每天训练一次与隔天训练两次），4周的短跑训练仍显著降低了静息血清鸢尾素浓度。
