Effects of indulgent food snacking, with and without exercise training, on body weight, fat mass, and cardiometabolic risk markers in overweight and obese men

Despite ingesting 48 donuts (~14,500  kcal) over 4 weeks, overweight and obese men did not gain weight or body fat, and actually experienced an increase in oral glucose tolerance. HIIT and MICT improved cardiorespiratory fitness during the 4 weeks of indulgent food snacking but did not improve most cardiometabolic risk markers. Cons umption of the donuts may have prevented expected improvements in endothelial function following HIIT. AbstractWe hypothesized that exercise training would prevent gains in body weight and body fat, and worsening of cardiometabolic risk markers, during a 4-week period of indulgent food snacking in overweight/obese men. Twenty-eight physically inactive men (ages 19 –47 yr) with body mass index (BMI) ≥25 kg/m2 consumed 48 donuts (2/day, 6  days/week; ~14,500 kcal total) for 4 weeks while maintaining habitual diet. Men were randomly assigned to control (n = 9), moderate-intensity continuous training (MICT;n = 9), or high-intensity interval training (HIIT;n = 10). Exercise training occurred 4 days/week, ~250 kcal/session. Controls did not increase body weight, body fat, or visceral abdominal fat. This was partially explained by a decrease in self-reported habitual energy (−239 kcal/day,p  =  0.05) and carbohydrate (−47 g/day;p = 0.02) intake. Large inter-individual variability in changes in body weight, fat, and fat-free mass was evident in all groups. Fasting blood pressure, and blood concentrations of glucose, insulin, ...
Source: Physiological Reports - Category: Physiology Authors: Tags: ORIGINAL ARTICLE Source Type: research