Chua Man Tong, Balasekaran Govindasamy, Ihsan Mohammed, Aziz Abdul Rashid
Physical Education and Sports Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore.
Athlete Health and Performance Centre, Aspetar Orthopaedic and Sport Medicine Hospital, Doha 29222, Qatar.
Sports (Basel). 2019 Aug 5;7(8):188. doi: 10.3390/sports7080188.
The purpose of this study is to investigate the effects of ingesting either a high glycaemic index (HGI) or low glycaemic index (LGI) carbohydrate meal (preceding a 12 h overnight fast and where the meal was ingested 45-min prior to activity) on intermittent sprint and endurance exercise performance. Ten male varsity athletes from intermittent sports (age 23.6 ± 1.7 years, VO 51.9 ± 4.7 mL·kg·min) underwent a peak velocity (V) test and familiarisation session, followed by two experimental sessions in random order. Experimental sessions involved the ingestion of either an HGI or LGI meal, followed by the completion of the modified Loughborough Intermittent Shuttle Test (mLIST). There was no significant difference between HGI or LGI meals on sprint times ( = 0.62) and distance to exhaustion ( = 0.54) in the mLIST. Exercise heart rate, blood lactate and ratings of perceived exertion were also similar between the two meal trials throughout the mLIST (all > 0.05). Subjective ratings of hunger, fullness, satiety and satisfaction were also not significantly different between the two meals. In conclusion, consuming either an HGI or LGI meal after a prolonged 12 h fast and ingesting the meal 45 min prior to exercise did not differ in either physiological, subjective and intermittent sprint and endurance performance outcomes.
本研究的目的是调查在禁食12小时过夜且在运动前45分钟摄入的情况下，食用高血糖指数（HGI）或低血糖指数（LGI）碳水化合物餐对间歇性冲刺和耐力运动表现的影响。10名来自间歇性运动项目的男性大学生运动员（年龄23.6±1.7岁，VO₂max 51.9±4.7 mL·kg⁻¹·min⁻¹）进行了峰值速度（V̇ₒ₂max）测试和熟悉训练，随后按随机顺序进行了两次实验。实验包括摄入HGI餐或LGI餐，然后完成改良的拉夫堡间歇性穿梭跑测试（mLIST）。在mLIST中，HGI餐和LGI餐在冲刺时间（p = 0.62）和疲劳距离（p = 0.54）方面没有显著差异。在整个mLIST中，两次餐食试验的运动心率、血乳酸和主观用力程度评分也相似（均p > 0.05）。两餐之间饥饿、饱腹感、饱足感和满意度的主观评分也没有显著差异。总之，在禁食12小时后食用HGI餐或LGI餐，并在运动前45分钟摄入，在生理、主观以及间歇性冲刺和耐力运动表现结果方面没有差异。
