KORELASI LOWER LIMB LEAN MASS TERHADAP DAYA LEDAK OTOT TUNGKAI PADA ATLET RENANG SUB-ELIT
CORRELATION BETWEEN LOWER LIMB LEAN MASS AND LEG MUSCLE EXPLOSIVE POWER IN SUB-ELITE SWIMMERS
Lower Limb Lean Mass (LLLM) merepresentasikan massa otot bebas lemak pada tungkai bawah yang berperan penting dalam menghasilkan daya ledak. Penelitian ini bertujuan menganalisis hubungan antara LLLM dengan daya ledak otot tungkai pada atlet renang sub-elit. Subjek penelitian terdiri dari 33 atlet (22 laki-laki, 11 perempuan; usia 17.36 ± 1.55 tahun, tinggi badan 164.3 ± 7.57 cm, massa tubuh 56.39 ± 7.58 kg, BMI 20.84 ± 2.1 kg/m²). Pengukuran LLLM dilakukan menggunakan InBody 270, sedangkan daya ledak dievaluasi melalui tes Countermovement Jump (CMJ) dengan Force-decks. Hasil analisis menunjukkan korelasi signifikan antara LLLM dengan jump height (p = 0.001; r = 0.553), peak power (p = 0.001; r = 0.821), dan takeoff peak force (p = 0.001; r = 0.805). Temuan ini menegaskan bahwa LLLM berperan penting dalam mendukung performa eksplosif, khususnya pada fase start dan balikan. Dengan demikian, LLLM dapat dijadikan indikator fungsional dalam perancangan program latihan renang.
Lower Limb Lean Mass (LLLM) represents the fat-free muscle mass in the lower extremities, which plays a crucial role in generating explosive power. This study aimed to analyze the relationship between LLLM and lower limb explosive power in sub-elite swimmers. Thirty-three athletes participated (22 males, 11 females; age 17.36 ± 1.55 years, height 164.3 ± 7.57 cm, body mass 56.39 ± 7.58 kg, BMI 20.84 ± 2.1 kg/m²). LLLM was assessed using an InBody 270 body composition analyzer, while explosive power was evaluated through the Countermovement Jump (CMJ) test with Force-decks. Results demonstrated significant correlations between LLLM and jump height (p = 0.001; r = 0.553), peak power (p = 0.001; r = 0.821), and takeoff peak force (p = 0.001; r = 0.805). These findings indicate that LLLM contributes substantially to explosive performance, particularly during the start and turn phases in swimming. Therefore, LLLM may serve as a functional indicator for monitoring and designing training programs to enhance swimmers explosive capacity.