Daytime and nighttime casein supplements similarly increase muscle size and strength in response to resistance training earlier in the day: a preliminary investigation

Journal of the International Society of Sports Nutrition
Jordan M JoyNancy M DiMarco

Abstract

Casein protein consumed before sleep has been suggested to offer an overnight supply of exogenous amino acids for anabolic processes. The purpose of this study was to compare supplemental casein consumed earlier in the day (DayTime, DT) versus shortly before bed (NightTime, NT) on body composition, strength, and muscle hypertrophy in response to supervised resistance training. Thirteen males participated in a 10-week exercise and dietary intervention while receiving 35 g casein daily. Isocaloric diets provided 1.8 g protein/kg body weight. Both groups increased (p < 0.05) in lean soft tissue (DT Pre: 58.3 ± 10.3 kg; DT Post: 61.1 ± 11.1 kg; NT Pre: 58.3 ± 8.6 kg; NT Post: 60.3 ± 8.2 kg), cross-sectional area (CSA, DT Pre: 3.4 ± 1.5 cm2; DT Post: 4.1 ± 1.7 cm2; NT Pre: 3.3 ± 1.6 cm2; NT Post: 3.7 ± 1.6 cm2) and strength in the leg press (DT Pre: 341 ± 87.3 kg; DT Post: 421.1 ± 94.0 kg; NT Pre: 450.0 ± 180.3 kg; NT Post: 533.9 ± 155.4 kg) and bench press (DT Pre: 89.0 ± 27.0 kg; DT Post: 101.0 ± 24.0 kg; NT Pre 100.8 ± 32.4 kg; NT Post: 109.1 ± 30.4 kg) with no difference between groups in any variable (p > 0.05). Both NT and DT protein consumption as part of a 24-h nutrition approach are effective for increasing strength and hyp...Continue Reading

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References

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Jul 30, 2016·Nutrients·Amber W KinseyMichael J Ormsbee

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Citations

Sep 12, 2018·International Journal of Sports Physiology and Performance·William AbbottTom Clifford
Jul 23, 2020·Physical Activity and Nutrition·Jooyoung Kim
Mar 10, 2020·Journal of Human Kinetics·Brandon M RobertsPeter J Fitschen
May 5, 2020·Critical Reviews in Food Science and Nutrition·Priscila Berti Zanella Master, Rodrigo Cauduro Oliveira Macedo
Jul 8, 2020·Nutrients·Jose AntonioJustin Roberts
Nov 13, 2019·Current Nutrition Reports·Martin HueckerJanese Laster
Dec 16, 2020·International Journal of Sport Nutrition and Exercise Metabolism·Vincent G KellyDavid G Jenkins
Jun 15, 2021·The British Journal of Nutrition·Reza BagheriAmir Rashidlamir

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