Combination effect of core stability exercise and contract relax exercise on hamstring flexibility

Hamstring is a muscle group that often has a reduced flexibility compared to other muscle groups. This hamstring flexibility reduction can lead as a low back pain risk factor. Nowadays, the combination effect of core stability and contract relax exercise on hamstring flexibility is still unclear. The aim of this research was to know about this exercise on hamstring flexibility. This research is experimental with 24 subjects of healthy female students who participated in the exercise program for 4 weeks consisting of 3 times per week. Subjects were randomly assigned to one of three groups: (1) core stability-CS (n = 8) (2) core relax-CR(n = 8), (3) core stability combined contract relax-CS + CR(n = 8). The hamstring flexibility was assessed with sit and reach test using the sit and reaches box. The examinations were conducted by observers twice, prior the training program and 2 days after the last session of exercise. 22 subjects were analyzed (CS,n = 7;CR,n = 8;CS + CR,n = 7). The paired t test analysis of each group showed significant CS (p = 0.03), CR (p = 0.00), CS + CR (p = 0.01) in increasing of result sit and reach test was observed. There was a difference between the three groups by the ANOVA test (p = 0.00). This study shows that combination of core stability and contract relax exercises can increase hamstring flexibility

Comparison of sport massage and combination of cold water immersion with sport massage on decrease of blood lactic acid level

Recovery is an attempt to reduce blood lactic acid levels and make the body recover after physical exercise. The effect of cold water immersion (15°C) and sport massage combined with decreasing blood lactic acid level is still unknown. The subjects assigned to 3 groups, K1 group for recovery sport massage, K2 recovery group for combination of cold water immersion (15°C) with sport massage and K3 control group. Both groups performed sub-maximal physical exercise by doing a fast walk on the treadmill to reach (80% HRM) and then maintained for 5 minutes, followed by recovery process. ANOVA test of lactic acid level post treatment which shows there was a significant difference in the decrease of lactic acid level. The paired t-test of each group showed significant results in sports massage group (p = 0,001), combination cold water immersion (15°C) with sport massage group (p = 0,000) and a control group (p = 0,002). Recovery by soaking in contrasting waters, which result in alternating vasoconstriction and vasodilation, is considered to act in a manner similar to muscle pumping (vaso-pumping). Recovery by means of sport massage and combination of cold water immersion (15°C) with sport massage can decrease blood lactic acid levels