Introduction: The purpose of this study was to investigate the effect of 6 weeks of plyometric training in water and land on some physiological indicators and the serum level of creatine kinase enzyme in female volleyball players of Zarand city. For this purpose, 20 female volleyball players in the age range of 21-25 years were selected from among the volunteers and divided into two groups: water plyometrics (10 people) (age: 23±1.49 years, weight: 64.3±3.26 kg) ) andland plyometrics (10 people) (age: 22.9±1.52 years, weight: 63.4±2.67 kg) . In the basic stage, after the first, third and sixth weeks, the level of strength and agility was measured using the desired tests. Also, a venous blood sample was taken to measure serum creatine kinase. Data analysis was performed using independent t-test and analysis of variance with repeated measurements at a significance level of P≥0.05.
Results: The findings indicated a significant increase in muscle power level after three and six weeks of plyometric activity in water (P≥0.05). While in the land training group, the power level increased significantly only in the sixth week (P≥0.05). Also, the level of agility in both plyometric groups in water and land increased significantly in the third and sixth weeks (P≥0.05). The amount of creatine kinase also showed a significant decrease in both groups in the sixth week (P≥0.05). Likewise, a significant difference was observed between the plyometric group in water and land in terms of power level in the third and sixth weeks (P≥0.05). However, no significant difference was reported between the two groups in terms of agility (P≤0.05). But the difference of creatine kinase in the sixth week between the two groups was significant (P≥0.05).
Conclusion: plyometric exercises in water and land lead to increase in strength and agility and decrease in serum creatine kinase. However, plyometric exercises in water lead to more effects on the above indicators.