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Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/74454

Type: Journal article
Title: Comparison of the effects of weight loss from a high-protein versus standard-protein energy-restricted diet on strength and aerobic capacity in overweight and obese men
Author: Wycherley, T.
Buckley, J.
Noakes, M.
Clifton, P.
Brinkworth, G.
Citation: European Journal of Nutrition, 2013; 52(1):317-325
Publisher: Dr Dietrich Steinkopff Verlag
Issue Date: 2013
ISSN: 1436-6207
1436-6215
Statement of
Responsibility: 
Thomas P. Wycherley, Jonathan D. Buckley, Manny Noakes, Peter M. Clifton and Grant D. Brinkworth
Abstract: PURPOSE: To compare the effects of two low-fat, hypoenergetic diets differing in carbohydrate-to-protein ratio, on strength and aerobic capacity measures in overweight and obese men. METHODS: In a parallel design, 56 men (age, 45.5 ± 8.7 years; BMI, 33.6 ± 3.9 kg/m2) were randomly assigned to a low-fat, energy-restricted diet (7,000 kJ/day) with either high protein (HP: protein/carbohydrate/fat % energy, 35:40:25) or standard protein (SP, 17:58:25). Body weight, body composition, muscle strength and aerobic capacity were assessed at baseline and after 12 weeks. RESULTS: Forty-two participants completed the study (HP, n = 21; SP, n = 21). Both groups experienced similar reductions in body weight (HP, -10.7 ± 5.3 kg [-9.8%]; SP, -8.7 ± 3.5 kg [-8.4%]) and fat-free mass (HP, -2.8 ± 3.6 kg; SP, -3.2 ± 2.7 kg; P<0.001 time; P[0.14 time 9 group interaction). There was a trend for a greater reduction in fat mass in the HP diet group, (-7.7 ± 4.3 kg [-21.2%] vs. -5.4 ± 3.3 kg [-15.1%]; P<0.001 time; P = 0.06 time 9 group interaction). Absolute peak oxygen uptake did not change in either group (P = 0.39 time; P = 0.50 time 9 group interaction). Overall, in both groups, relative peak oxygen uptake increased (2.9 ± 2.8 ml kg-1 min-1 [8.9%]), peak isometric knee extensor strength increased (14.1 ± 35.7 Nm [7.1%]) and peak handgrip strength decreased (-1.6 ± 4.1 kg [-3%]) (P B 0.02 time for all), with no diet effect (P 0.23 time 9 group interaction). CONCLUSION: In overweight and obese men, both a HP and SP diet reduced body weight and improved body composition with similar effects on strength and aerobic capacity.
Keywords: Diet composition; exercise capacity; weight loss; physical function; nutrition
Rights: © Springer-Verlag 2012
RMID: 0020122614
DOI: 10.1007/s00394-012-0338-0
Appears in Collections:Paediatrics publications
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