Influence of different types of diets and a protocol of aerobic exercise on the mechanical properties of bones

Abstract

The purpose of this study was to evaluate the effects of different types of diets and the swimming exercise in tibias of rats. This study was approved by Ethical Committee in Animals Experiment. Sixty three‐month‐old male Wistar rats were randomly assigned to six groups (n=10): (G1) control AIN‐93 diet sedentary, (G2) control AIN‐93 diet aerobic training, (G3) high‐fat diet sedentary, (G4) high‐fat diet aerobic training, (G5) high‐fat‐protein diet sedentary, (G6) high‐fat‐protein diet aerobic training. Control diet is AIN‐93. The total caloric values of control, high‐fat and high‐fat‐protein diet is respectively 394.8 kcal, 609.8 Kcal, 609.8 Kcal for 100g of diet. Physical exercise consisted of swimming on a large aquarium. Rats swam 5 days a week, 60 minutes, during 8 weeks. Tibias were dissected and tested in a universal testing machine. Data were analyzed using specific tests; level of significance was set at 5%. Mean values of maximum load for groups: G1 (40.5±5.6)N, G2 (44.8±7.4)N, G3 (64.2±4.1)N, G4 (53.3±9.4)N, G5 (48.5±10.8)N and G6 (47.4±7.1)N. Data from our study suggest that a diet programs may influence bone resistance however changing its body weight.Grant Funding Source: FAPESP