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Effects of isocaloric carbohydrate-protein versus protein recovery drink on muscle function following resistance exercise
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Type
Final Year Project (FYP)
Author
Tan, Ci Hui
Supervisor
Yang, Yifan
Abstract
Intense resistance exercise (RE) can reduce muscle glycogen content and cause muscle damage, affecting muscle functional performance. Post-exercise ingestion of protein (PRO) and/or carbohydrate (CHO) may enhance muscle recovery, but its effects on subsequent performance are debatable. This study aimed to compare the effects of a carbohydrate-protein (CHO-PRO) and isocaloric PRO drink on the recovery of muscular strength, power and endurance in young women, following an acute RE bout. It was hypothesised that both CHO-PRO and PRO would induce greater recovery of muscle function (MF) compared to control (CON), but there would be no difference in recovery when comparing between CHO-PRO and PRO. Seven untrained women (Mean ± SD: Age = 21.9 ± 0.4 years, BMI = 20.8 ± 1.7 kg/m2) randomly ingested a PRO, CHO-PRO or CON drink immediately after completing 4 sets of 10 repetitions of deadlift, leg press, leg curl and leg extension at their 10-repetition maximum. Extensor peak torque, work per repetition, average power and total work were measured immediately and 3-hour post-RE using an isokinetic dynamometer. Data were analysed using one-way repeated-measures ANOVA, with an alpha of 0.05. When compared with baseline, net decrements in MF post-RE were generally not significant (0.060 ≤ p ≤ 0.781). No significant differences (0.067 ≤ p ≤ 0.969) were found in the recovery of functional performance across conditions. The results indicated that PRO and CHO-PRO did not result in greater post-exercise recovery of muscular strength, power and endurance in untrained women, compared to CON.
Date Issued
2015
Publisher
Nanyang Technological University