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Charles Prakas Purba
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ANALISIS GERAK OTOT-OTOT INTI PADA FASE START DAN PUTARAN RENANG GAYA BEBAS Charles Prakas Purba; Krish Dwi Sadewa Pakpahan; Van Assel Simangunsong; Sopian Siregar; Aziz Torang Koto; Mahmuddin
JURNAL ILMU KEOLAHRAGAAN Vol 24 No 2 (2025): JURNAL ILMU KEOLAHRAGAAN
Publisher : Fakultas Ilmu Keolahragaan Unimed

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jik.v24i2.70003

Abstract

This study aims to analyze the activity of swimmers’ core muscles during the start and turn phases in freestyle swimming using the electromyography (EMG) method. The core muscles are an essential component of the human movement system that function to maintain trunk stability, transfer power from the lower limbs to the upper limbs, and preserve the streamline position while swimming. Proper activation of the core muscles improves movement efficiency and contributes to faster swimming performance.The study was conducted by observing athletes during the start and turn-back phases of freestyle swimming. Observations were focused on two main phases: the start phase and the turn phase. The results showed that the highest core muscle activity occurred during the take-off phase at the start and the push-off phase from the wall. The gluteus maximus and erector spinae muscles played dominant roles in generating explosive power, while the transversus abdominis was essential for maintaining body stability during the glide phase. This study concludes that coordination and strength of the core muscles significantly affect speed, efficiency, and body stability during the critical phases of freestyle swimming. Core muscle strengthening exercises are therefore recommended as a primary component of swimming training programs to enhance athletic performance.
Co-Authors Aziz Torang Koto Krish Dwi Sadewa Pakpahan Mahmuddin Mahmuddin Sopian Siregar Van Assel Simangunsong