Vishaw Gaurav

A STUDY OF VERTICAL JUMP PERFORMANCE AMONG U-19 VOLLEYBALL PLAYERS BY PLAYING POSITIONS

The purpose of this study was to compare the vertical jump performance among under-19 age group male volleyball players by playing positions. A sample of Forty eight (N = 48) male volleyball players (mean ± SD: age 18.35 ± 0.56 years, height 182.23 ± 5.12 cm, weight 75.56 ± 5.77 kg, BMI 22.67 ± 1.26), which includes twelve each blockers, setters, liberos and spikers, who participated in inter-district school competitions, was selected from various schools affiliated to Punjab School Education Board. All the participants were informed about aim and methodology of the study and they volunteered to participate in this study. Vertical jump test was conducted to see the vertical jump performance of the subjects.One way Analysis of Variance (ANOVA) was applied to find out the significance of differences with regard to vertical jump performance among blockers, setters, liberos and spikers. Scheffe’s post-hoc test (SPHT) was applied to see the direction and significance of differences where ‘F’ value found statistically significant. The level of significance was set at 0.05.While comparing the means; it revealed that blockers had better explosive leg power than their counterparts, while liberos had shown less explosive leg power than their counterparts. Further, significant differences were found between blockers and liberos with regard to power (p? 0.05).

Comparison of Cardiovascular Fitness between Adolescent Athletes and Non-Athletes

The purpose of this study was to compare the cardiovascular fitness between adolescent athletes and non-athletes. The present study was conducted on a sample of sixty (N=60) adolescent, which includes thirty each, athletes (N1 = 30, mean ± SD: age 18.0± 0.79 years, height 177.53± 4.68cm, weight 71.53± 5.97kg, BMI 22.67± 1.48) and non-athletes (N2 = 30, mean ± SD: age 17.70± 0.70 years, height 174.80±4.73cm, weight 73.10±5.12 kg, BMI 23.97± 1.29) selected from different schools affiliated to Punjab School Education Board, Punjab, India. Height measurements were taken by using the standard anthropometric rod to the nearest 0.5 cm. The subject’s weight was measured with portable weighing machine to the nearest 0.5 kg. The 12 minute run/walk test was used to assess cardiovascular fitness of subjects. The independent samples t-test was applied to assess the differences between athletes and non-athletes. The results of present study indicated that athletes had significantly greater cardiovascular fitness (p<0.05) than non-athletes.

Respiratory Functions of Volleyball Players According To Specific Playing Positions

The purpose of the study was to compare the respiratory functions of volleyball players according to specific playing position. For this study, two hundred and forty male volleyball players (Blockers-68, Liberos-41, Setters-48, Spikers-83) of age ranging from 18-25 years were selected as subjects from various colleges and universities of North India. The purposive sampling technique was used to select the subjects. Respiratory functions were measured with computerized spirometer. One-way analysis of variance (ANOVA) was employed to compare the volleyball players among different playing positions. Following the detection of a significant main effect, Bonferroni‟s post-hoc analyses were performed to locate where specific mean differences were laid. Significance levels were set at p<0.05. Results showed that there was no statistically significant difference observed for inspiratory capacity and vital capacity in the volleyball players among different playing positions. In case of inspiratory reserve volume and expiratory reserve volume, statistically significant difference was noticed in the volleyball players among different playing positions. Setters had significantly lower inspiratory reserve volume than the blockers and spikers. Expiratory reserve volume was highest in blockers and this was followed by spikers, liberos and setters respectively. These might be due to the variation in body height, body weight, sporting activity and specific playing position, which influence the respiratory functions.