Effect of Pre-sleep Casein and Tryptophan Supplementation on Energy Expenditure Before, During, and After Exercise in Active Females

Main Article Content

Hannah Nelson
Silvio P. Valladão
Neil Schwarz
Melinda Valliant
Thomas L. Andre

Keywords

Protein supplementation, Metabolic rate, Perceived sleep

Abstract




Introduction: The purpose of this study was to determine the impact of pre-sleep casein protein and tryptophan supplement (SUP) ingestion on sleep quality and morning energy expenditure prior to, during, and post-exercise. Methods: Thirteen aerobically active females (age = 22.6 ± 1.9yrs; ht = 1.65 ± 0.06m; wt = 60.5 ± 9.6kg; %bf = 22.5 ± 4.3) ingested SUP or placebo (PLA) 30 min prior to going to bed in 2 trials. The following morning, perceived sleep quality and satiety were assessed, and resting energy expenditure (REE) was measured for 30 minutes before and after 20 min of exercise at 40-50% of VO2max while measuring exercise energy expenditure (EEE). Results: Sleep quality and satiety during SUP was not significantly different than PLA trial (61.6 ± 21.5 vs 68.4 ± 20.5 mm; p = 0.39; 29.6 ± 8.2 vs 23.9 ± 6.6 mm; p = 0.43). REE before and after exercise during SUP and PLA were not significantly different F(1,12)=0,141, p = 0.71. EEE during SUP was not significantly different than PLA (112.1 ± 20.4 vs 112.2 ± 21.8 kcals; p = 0.91). Conclusion: No changes were seen when ingesting SUP prior to sleep on morning EEE and REE before and after exercise.




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