Comparison of the Effectiveness of Two Training Programs of Resistance Stretching and Plyometric Resistance on Hypertrophy (TGF-β1) and Muscle Strength in Female Handball Players

Subject Areas : Physiology of Fitness

zahra ahmadinia ¹ , sareh hasani ² , bahram abedi ³ , Mojtaba Khansooz ⁴

1 - Department of Physical Education, Tolo Mehr Institute, Non-Profit University, Qom, Iran
2 - Department of Physical Education, Tolo Mehr Institute, Non-Profit University, Qom, Iran.
3 - Department of Physical Education, North Tehran Branch, Islamic Azad University, Tehran. Iran
4 - Department of Physical Education and Sports Sciences, Islamic Azad University, Arak Branch, Arak, Iran

Received: 2023-08-20 Accepted : 2023-12-06 Published : 2023-11-22

Keywords: Muscle strength, TGF-β1, Plyometric resistance training, stretching resistance training, handball girls,

Abstract :

Introduction: The present study was conducted with the aim of comparing the effect of resistance stretching and plyometric resistance exercises on TGF-β1 and muscle strength of female handball players.Methods: In this semi-experimental research, which was conducted with a pre-test-post-test design, 36 female handball players in the age range of 18 to 30 years were randomly assigned to three groups of plyometric, stretching and control exercises. Muscle strength measurement and blood sampling were done in two stages, 24 hours before the intervention and 48 hours after the end of the intervention. They commented. The collected data were analized by dependent t-test, covariance and Bonferroni's post hoc test.Results: The results of the study showed that six weeks of plyometric resistance training and stretching resistance training have a significant effect on reducing the serum levels of TGF-β1 and increasing the muscle strength of the upper and lower limbs (P<0.05). Other results showed that there is a significant difference between the plyometric resistance training group and the stretching resistance training group in the levels of TGF-β1, upper and lower limb muscle strength (p<0.05). In addition, the results indicated a greater effect size of plyometric resistance training compared to stretching resistance training on research variables.Conclusion: According to the findings of the present study, it seems that plyometric resistance training can be more effective in reducing TGF-β1 serum levels and increasing muscle strength in female athletes than stretching resistance training.