J Korean Phys Ther.  2022 Dec;34(6):312-316. 10.18857/jkpt.2022.34.6.312.

The Effect of a Kettlebell Complex Program according to the Support Surface on Lower Extremity Muscle Activity and Balance in Baseball Players

• Kang DH
• Kim YN

• KMID: 2538911
• DOI: http://doi.org/10.18857/jkpt.2022.34.6.312

Abstract

Purpose
The purpose of this study was to investigate the effect of a kettlebell complex program according to the support surface on the lower extremity muscle activity and balance of baseball players.
Methods
The participants were divided into two groups; unstable support surface group 1 (11 people) performed the kettlebell complex program on an unstable support surface, and stable support surface group 2 (10 people) performed the kettlebell complex program on a stable support surface. Muscle activity was measured by surface electromyography. Dynamic balance was measured with a balancemeasuring equipment. A paired t-test was used to compare groups before and after the experiment. An independent t-test was performed to determine the difference in the degree of change between the two groups before and after the experiment.
Results
The intragroup comparison between stable support surface group 1 and 2 showed significant differences in muscle activity and sense of balance. In the comparison between the groups, the difference in muscle activity in unstable support surface group1 was significant in the biceps femoris and rectus femoris muscles, and significant differences were also found in the sense of balance.
Conclusion
These results suggest that a kettlebell exercise on an unstable support surface is more effective in improving muscle activity and sense of balance than a kettlebell exercise on a stable support surface.

Keyword

Support surface; Kettlebell; Muscle activity; Balance