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Reduced resting skeletal muscle protein synthesis is rescued by resistance exercise and protein ingestion following short-term energy deficit.

Catalogue Information
Field name Details
Record Number 511614
ISSN 01931849
Item Type Electronic Resource
Creator Name Areta, J. L. Exercise and Nutrition Research Group, Health Innovations Research Institute, School of Medical Sciences, RMIT University, Melbourne, Australia.
Title Reduced resting skeletal muscle protein synthesis is rescued by resistance exercise and protein ingestion following short-term energy deficit.
Published 2014
Description 1 computer file (PDF)
Content Type text
Media Type computer
Carrier Type online resource
Notes The NSIC has a database subscription to this journal with a 1 year embargo.
Additional authors: Camera DM; West DW; Crawshay S; Moore DR; Stellingwerff T; Phillips SM; Hawley JA; Coffey VG.
Summary The myofibrillar protein synthesis (MPS) response to resistance exercise (REX) and protein ingestion during energy deficit (ED) is unknown. In young men (n = 8) and women (n = 7), we determined protein signaling and resting postabsorptive MPS during energy balance [EB; 45 kcal·kg fat-free mass (FFM)(-1)·day(-1)] and after 5 days of ED (30 kcal·kg FFM(-1)·day(-1)) as well as MPS while in ED after acute REX in the fasted state and with the ingestion of whey protein (15 and 30 g). Postabsorptive rates of MPS were 27% lower in ED than EB (P < 0.001), but REX stimulated MPS to rates equal to EB. Ingestion of 15 and 30 g of protein after REX in ED increased MPS ~16 and ~34% above resting EB (P < 0.02). p70 S6K Thr(389) phosphorylation increased above EB only with combined exercise and protein intake (~2-7 fold, P < 0.05). In conclusion, short-term ED reduces postabsorptive MPS; however, a bout of REX in ED restores MPS to values observed at rest in EB. The ingestion of protein after REX further increases MPS above resting EB in a dose-dependent manner. We conclude that combining REX with increased protein availability after exercise enhances rates of skeletal muscle protein synthesis during short-term ED and could in the long term preserve muscle mass. Authors.
Subjects body composition
fat-free mass
myofibrillar protein synthesis
weight loss
Added Author Burke, Louise M., Australian Institute of Sport, Canberra, Australia
Host entry American journal of physiology. Endocrinology and metabolism Vol. 306, no. 8 (Apr. 2014), pages E989-997.
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