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No sex difference in body fat in response to supervised and measured exercise.

Abstract：

UNLABELLED:It is often reported that females lose less body weight than males do in response to exercise. These differences are suggested to be a result of females exhibiting a stronger defense of body fat and a greater compensatory appetite response to exercise than males do. PURPOSE:This study aimed to compare the effect of a 12-wk supervised exercise program on body weight, body composition, appetite, and energy intake in males and females. METHODS:A total of 107 overweight and obese adults (males = 35, premenopausal females = 72, BMI = 31.4 ± 4.2 kg·m(-2), age = 40.9 ± 9.2 yr) completed a supervised 12-wk exercise program expending approximately 10.5 MJ·wk(-1) at 70% HRmax. Body composition, energy intake, appetite ratings, RMR, and cardiovascular fitness were measured at weeks 0 and 12. RESULTS:The 12-wk exercise program led to significant reductions in body mass (males [M] = -3.03 ± 3.4 kg and females [F] = -2.28 ± 3.1 kg), fat mass (M = -3.14 ± 3.7 kg and F = -3.01 ± 3.0 kg), and percent body fat (M = -2.45% ± 3.3% and F = -2.45% ± 2.2%; all P < 0.0001), but there were no sex-based differences (P > 0.05). There were no significant changes in daily energy intake in males or females after the exercise intervention compared with baseline (M = 199.2 ± 2418.1 kJ and F = -131.6 ± 1912.0 kJ, P > 0.05). Fasting hunger levels significantly increased after the intervention compared with baseline values (M = 11.0 ± 21.1 min and F = 14.0 ± 22.9 mm, P < 0.0001), but there were no differences between males and females (P > 0.05). The exercise also improved satiety responses to an individualized fixed-energy breakfast (P < 0.0001). This was comparable in males and females. CONCLUSIONS:Males and premenopausal females did not differ in their response to a 12-wk exercise intervention and achieved similar reductions in body fat. When exercise interventions are supervised and energy expenditure is controlled, there are no sex-based differences in the measured compensatory response to exercise.

journal_name

Med Sci Sports Exerc

journal_title

Medicine and science in sports and exercise

authors

Caudwell P,Gibbons C,Hopkins M,King N,Finlayson G,Blundell J

doi

10.1249/MSS.0b013e31826ced79

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

351-8

issue

eissn

0195-9131

issn

1530-0315

journal_volume

pub_type

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No sex difference in body fat in response to supervised and measured exercise.