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

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,...

Full description

Saved in:

Bibliographic Details
Published in:	Journal of the International Society of Sports Nutrition Vol. 15; no. 1; p. 24
Main Authors:	Joy, Jordan M, Vogel, Roxanne M, Shane Broughton, K, Kudla, Urszula, Kerr, Nathaniel Y, Davison, Jason M, Wildman, Robert E C, DiMarco, Nancy M
Format:	Journal Article
Language:	English
Published:	United States BioMed Central Ltd 15-05-2018 Taylor & Francis Ltd BioMed Central Taylor & Francis Group
Subjects:	Adolescent Adult anabolic window Analysis Body Composition Body fat Casein Caseins - administration & dosage Diet Dietary Supplements Double-Blind Method Fitness training programs Health aspects Humans hypertrophy Influence Male Muscle strength Muscle Strength - drug effects Muscle, Skeletal - drug effects Muscle, Skeletal - physiology Nutrition research protein Proteins Resistance Training Sleep Strength training supplements Time Time Factors timing Warm up (exercise) Weight training window of opportunity Young Adult Window of opportunity Resistance training Timing Anabolic window Protein Supplements Hypertrophy
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	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 hypertrophy. The results support the strategy of achieving specific daily protein levels versus specific timing of protein ingestion for increasing muscle mass and performance. ClinicalTrials.gov Identifier: NCT03352583 .
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-News-1 ObjectType-Feature-3 content type line 23
ISSN:	1550-2783 1550-2783
DOI:	10.1186/s12970-018-0228-9