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)