Diet only is as effective for weight loss?

A randomized controlled trial (CALERIE) done by Redman et al to test the effect of a 25% energy deficit by diet alone,CR or diet (12.5% Energy deficit) plus exercise (12.5% increase in exercise energy expenditure),CR+EX for 6 months on body composition and fat distribution. Thirty-five out of 36 healthy overweight (16M/19F) subjects completed the study. Participants lost 10% of body weight (CR:-8.3±0.8, CR+EX:-8.1±0.8kg, p=1.00), 24% of fat mass (CR:-5.8±0.6, CR+EX:-6.4±0.6kg, p=0.99), and 27% of abdominal visceral fat (CR:0.9±0.2, CR+EX:0.8±0.2kg, p=1.00). This study suggests that diet restriction may be equivalent to diet restriction and exercise.
Journal of Clinical Endocrinology & Metabolism, doi:10.1210/jc.2006-2184
Blog Authors comment: This study does not rule out the additional benefits of doing physical exercise which has cardiovascular and metabolic implications. However, it is encouraging as a weight loss of 10% has additional benefits on cardiovascular risk reductions for obese or overweight patients.

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