The impact of strength loads on the health status and physical readiness of female cadets.

OBJECTIVE: Aim: To investigate the impact of kettlebell strength training on the health and physical readiness of female cadets during martial law training. PATIENTS AND METHODS: Materials and Methods: The research involved 60 female cadets, 30 each in the experimental (EG) and the control (CG) groups. The EG cadets were engaged in kettlebell exercises during the hours of their sporting and mass participation activities, while the CG cadets were engaged according to the traditional methodology. The health status was assessed by anthropometry and cardiovascular system indicators; physical readiness - by the results of 100 meter run, push-ups, and 1 km run. RESULTS: Results: It was found that at the end of the research, most indicators of health and physical readiness in female cadets engaged in kettlebell exercises were significantly better than those who were engaged in physical exercises according to the traditional methodology. The most pronounced effect of strength loads was found on the development of strength qualities, stabilization of body weight, and improvement of the functional capabilities of the cardiovascular system. In the 4th semester, the female cadets of the EG showed significantly better than in the CG indicators of BMI, SI, heart rate recovery time, LPH, results in push-ups, and 1 km run. CONCLUSION: Conclusions: It is proved that strength loads in exercises with kettlebells, having several positive features, effectively impact the state of health and development of motor skills in female cadets, as well as contribute to the formation of an aesthetic physique and weight loss.

Comparison of compressive strength and fracture mode between four kinds of CAD/CAM zirconia / 医用生物力学

Objective To analyze the compressive strength and fracture mode between four kinds of dental zirconia CAD/CAM ceramic materials by Hertzian contact test. Methods Four CAD/CAM ceramic materials including Cercon smart, Lava, Porcera, and CEREC 3 were selected. Six zirconia sectioned flat specimens were prepared in each group. The critical load and fracture load as well as the fracture mode for each specimen were analyzed with digital image correlation (DIC) technique. Results It was found that cracks were initiated at the middle level of the veneer below the contact zone and propagating along an arc curve into the core/veneer interface, which eventually caused the debonding of the core/veneer layers. For the four ceramic systems, there were no significant differences in the critical load（P＞0.05）, while there were significant differences in the fracture load（P＜0.05）. Conclusions The compressive strength of the four zirconia CAD/CAM ceramic materials could substantially meet the clinic requirement for oral functions regarding the maximum occlusal load. Crack initiation and complete fracture only occurred in the veneer, which indicated that the strength of the veneer should be further reinforced.