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Weight Loss Program and Work Capacity
Effect of Integrated Body Weight Loss Plan
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Weight Loss Program & Work Capacity - Study

Three-week integrated body weight loss program markedly improves performance and work capacity in severely obese patients.

Weight Loss Study - Aim
To assess the effects on performance and work capacity of a short-term (3-week) integrated body weight loss program consisting of an energy-restricted diet, nutritional education, psychological counselling and aerobic exercise training at a constant metabolic load (5 days/week) in 71 severely obese patients (18 males and 53 females aged 29.3 +/- 0.8 years, with a mean weight of 113.8 +/- 2.2 kg and a mean BMI of 41.3 +/- 0.5 kg/m(-2)). Body mass and composition, and maximum oxygen consumption (VO2max) were determined before and after the program. The caloric equivalent of work output and a performance index (PI) during 10 min of bicycle ergometer pedalling (50-60 rpm) and 20 min of treadmill walking (incline 0-3 percent) at a constant metabolic load (50 percent of individual VO2max during the preliminary conditioning period - 1st week - and 60 percent during the exercise conditioning period--2nd and 3rd week) were evaluated daily throughout the study.

Weight Loss Study - Results
After the program, body mass reduced significantly (-4.5 percent, p<0.001), the weight loss being sustained entirely by a significant reduction in fat mass (-7.6 percent, p<0.001) without any significant changes in fat-free mass. Absolute and body mass-related VO2max significantly increased by respectively 14.5 percent and 20.2 percent (p<0.001). Both daily work output during constant metabolic load (ANOVA, p<0.05-0.001) and PI (ANOVA, p<0.05-0.001) increased significantly during each week of the program, leading to a total increase in work output in response to exercise conditioning of 44.6 +/- 5.8 kcal.

Weight Loss Study - Conclusions
The changes in exercise capacity induced by the present program offer significant advantages for obese patients that can be quantified in terms of an improvement in their ability to perform everyday activities, thus contributing towards improving their quality of life.

Source: Sartorio A, Ottolini S, Agosti F, Massarini M, Lafortuna CL.
Laboratorio Sperimentale di Ricerche Endocrinologiche, Istituto Auxologico Italiano, IRCCS, Milan, Italy. 2003

Weight Loss Methods
The science of weight loss and obesity management is constantly evolving, along with research into weight loss drugs, supplements and gastric bypass surgery. At present, however, a balanced diet combined with regular exercise remains the favored weight management strategy of most weight loss experts.

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