The effect of Explosive Strength Training program on growth factors (IGF-1, VEGF), muscle strength and aerobic capacity in inactive young women

Poster Presentation
Paper ID : 1474-12THCONG
Oral / Poster Presentation File: paper 1474.jpg 
Associate Professor in Exercise Physiology, Department of general courses, School of Medicine, Mashhad University of Medical Sciences (MUMS), Mashhad, Iran
Explosive training is the type of training that combines strength and speed to increase power output. Standard explosive exercises use large muscle movements such as squats, power cleans, weighted or unweighted vertical jumps, heavy ball throws, or even hill sprinting. The aim of this study was to investigate the effect of explosive exercises on growth factors (IGF-1, VEGF), muscle strength and aerobic power in inactive young women.
Thirty female volunteers (20-30 age) were selected and divided randomly into two groups (experimental, n= 15 and control, n= 15). Explosive Strength Training program was performed for 10 weeks (3 days/week, 45 to 60 minutes) for experimental group. Each session training consists of 10 minutes warm up, 30-45 minutes of low intensity explosive exercises for the upper and lower extremities and 5 minutes of cool down. Blood samples, lower and upper limbs strength, maximum oxygen uptake (Vo2max) and body composition were assessed before and after the training period. The control group had no exercise during this period. Data were analyzed using paired and independent t-test (p≤0/05).
The study showed that muscle strength (lower and upper limbs) and Vo2max increased significantly at the end of the training. Vascular endothelial growth factor (VEGF) significantly decreased and Insulin Like Growth Factor-1 (IGF-1), lean body mass, percentage of fat and body mass index (BMI) had not any significant differences (p≤0/05).
These findings suggest that 10-week explosive strength training can be an effective method to create neuromuscular and cardiovascular adaptations and increase muscle strength in the upper and lower limbs and aerobic capacity of young women.