Abstract
Background: Central Management of Indonesian Volleyball Association admits that volleyball achievements have not been maximized, so they need to be improved. The core muscle have a role in each volleyball technique so that very important to increase core muscle strength which also impacts on the extremities, furthermore, the strength play a role to another biomotor and impact athlete’s performance and achievement.
 Aim: to prove that providing of core stability exercise increase the core muscle strength of male volleyball athletes aged 18-25 years old in the volleyball unit of student activities at Bali Vocational Polytechnic.
 Method: an experimental study using a one group pre-test and post-test design with 22 total samples. Core muscle strength measured using one minute sit up test.
 Results: Hypothesis test using paired sample T-test with p value= 0,000 (p <0.005) statistically showed a significant increase in core muscle strength.
 Conclusion: based on statistical tests, providing core stability exercise increase the core muscles strength of male volleyball athletes in the volleyball unit of student activities at Bali Vocational Polytechnic.
Highlights
Volleyball is one of the most popular sports and have many enthusiast in Indonesia
Core muscles play an important role in the efficiency of movement, maintaining body position, maintaining flexibility and endurance strength when repeating performance, as well as supporting stabilization and strength to the arms and legs.[3]
Core muscles that work in volleyball techniques include external oblique, internal oblique, and transversus abdominis muscles in the abdominal regio,[4] multifidus and erector spinae muscles in the back regio and pelvic floor muscles.[5]
Summary
Volleyball is one of the most popular sports and have many enthusiast in Indonesia. Volleyball has gained many achievements, but the Management Board of Indonesian Volleyball Association (PP PBVSI) admits that these achievements have not been maximized, so they need to be improved.[1]. Volleyball athletes must have mastery basic techniques because it is important to produce optimal performance Provision of these basic techniques is a factor that can determine the victory or defeat of volleyball matches.[2] In each volleyball technique, core muscles play an important role in the efficiency of movement, maintaining body position, maintaining flexibility and endurance strength when repeating performance, as well as supporting stabilization and strength to the arms and legs.[3] Core muscles that work in volleyball techniques include external oblique, internal oblique, and transversus abdominis muscles in the abdominal regio,[4] multifidus and erector spinae muscles in the back regio and pelvic floor muscles.[5]. Increasing core muscle strength impacts athletes’ performance and minimizes the risk of injury.[8]
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