# Vertical jump performance gains from plyometric and air alert training in volleyball

## TL;DR

This study found that plyometric training improves vertical jump performance more effectively than the Air Alert program in collegiate volleyball players.

## Contribution

The study introduces a predictive model for post-training outcomes and compares two jump training protocols in a gender-specific context.

## Key findings

- Plyometric training led to greater vertical jump gains than the Air Alert program for both male and female athletes.
- Pre-test performance and training type were the strongest predictors of post-training jump height.
- Plyometric training is recommended for its effectiveness in enhancing neuromuscular adaptation.

## Abstract

This study compared the effects of two jump training protocols—Plyometric Training and the Air Alert Program—on vertical jump performance among male and female collegiate volleyball players. It also aimed to analyze time-dependent performance changes and develop a predictive model for post-training outcomes.

Twenty-four athletes (12 males, 12 females) were assigned to four groups (n = 6 each): male–plyometric, male–Air Alert, female–plyometric, and female–Air Alert. Both programs were implemented for eight weeks (3 sessions/week). Vertical jump height was measured at pre-, mid- (week 4), and post-training (week 8) using a Vertec device. Data were analyzed using repeated-measures ANOVA, independent t-tests, ANCOVA, and multiple regression. The significance level was set at p < .05.

Significant effects of time (p < .001) and training type (p = .002) were found, with greater gains in the plyometric group for both sexes. Regression identified pre-test performance (β = 0.35, p < .01) and training type (β = 4.12, p = .02) as key predictors of post-test height, explaining 94% of variance (R² = .94).

Plyometric training was superior to Air Alert in enhancing vertical jump height, emphasizing progressive, high-intensity, low-volume training for optimizing neuromuscular adaptation.

Coaches should integrate structured plyometric training early in the season and monitor mid-phase outcomes to predict final performance more effectively.