Background: Obesity has been associated with low levels of physical activity, psychological problems and high levels of caloric intake, new evidence shows that sleep time has become a
marker related with sedentary behaviors, fatness, and higher levels of cortisol. Objective: Evaluate the Effects of a health Program On sleep time, fat percentaje, cortisol and
physical activity levels in obese adolescents of Monterrey, Nuevo Leon. México
A pre post study with a sample of 51 adolescents randomized into two groups: Control (CG) and experimental (EG). They participated during 4 months in a health program. CG had 4 weekly sessions of 60
minutes of physical activity, one weekly session nutritional counseling and 2 weekly sessions of light therapy 45 minutes. EG received regular school Physical activities. The percentage of fat was
taken by BOD POD, the sleep time and physical activity levels (PA) were measured with (Actigraph GTx3), and salivary cortisol.
The results after the pre post comparison showed significant decreases in EG in body fat percentage (P = 0.015) cortisol (p = 0.41), and an increase of PA (p=0.20). In the CG only a significant
increase was observed in percentage of fat (p = 0.004). Sleep time was positively correlated with and fat mass (kg) (r=0.44 p<0.01=)
The health program with the intervention of physical activity and nutritional counseling, shows favorable effects in decreasing the percentage of fat and increse PA levels. It is recommended in
interventions related to health promotion include sleep time as health and obesity marker.