Article

The aim of this study was to study the impact of a combined long-term
lifestyle and high-intensity interval training intervention on body composition,
cardiometabolic risk, and exercise tolerance in overweight and obese subjects.
DESIGN: Sixty-two overweight and obese subjects (53.3 +/- 9.7 yrs; mean body mass
index, 35.8 +/- 5 kg/m(2)) were retrospectively identified at their entry into a
9-mo program consisting of individualized nutritional counselling, optimized
high-intensity interval exercise, and resistance training two to three times a
week. Anthropometric measurements, cardiometabolic risk factors, and exercise
tolerance were measured at baseline and program completion. RESULTS: Adherence
rate was 97%, and no adverse events occurred with high-intensity interval
exercise training. Exercise training was associated with a weekly energy
expenditure of 1582 +/- 284 kcal. Clinically and statistically significant
improvements were observed for body mass (-5.3 +/- 5.2 kg), body mass index (-1.9
+/- 1.9 kg/m(2)), waist circumference (-5.8 +/- 5.4 cm), and maximal exercise
capacity (+1.26 +/- 0.84 metabolic equivalents) (P < 0.0001 for all parameters).
Total fat mass and trunk fat mass, lipid profile, and triglyceride/high-density
lipoprotein ratio were also significantly improved (P < 0.0001). At program
completion, the prevalence of metabolic syndrome was reduced by 32.5% (P < 0.05).
Independent predictors of being a responder to body mass and waist circumference
loss were baseline body mass index and resting metabolic rate; those for body
mass index decrease were baseline waist circumference and
triglyceride/high-density lipoprotein cholesterol ratio. CONCLUSIONS: A long-term
lifestyle intervention with optimized high-intensity interval exercise improves
body composition, cardiometabolic risk, and exercise tolerance in obese subjects.
This intervention seems safe, efficient, and well tolerated and could improve
adherence to exercise training in this population.

Langue : ANGLAIS