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"[ABSTRAKPenelitian ini bertujuan untuk mengetahui efektivitas latihan Nordic hamstring sebagailatihan tambahan dalam upaya perbaikan faktor risiko cedera otot hamstring pemain futsal.Total pemain futsal (usia 18-21 tahun) berpartisipasi pada penelitian ini, 15 pemain padakelompok kontrol dan 16 pemain pada kelompok perlakuan. Kelompok perlakuan melakukanlatihan rutin ditambahkan latihan Nordic hamstring selama 4 minggu (protokol 4 minggu)dan kelompok kontrol melakukan latihan rutin. Pengukuran kekuatan otot hamstring danquadriseps dilakukan sebelum dan setelah perlakuan pada kedua kelompok dengan memakaialat isotonik dinamometer. Perubahan hasil pengukuran dalam setiap kelompok sebelum dansetelah perlakuan diolah menggunakan uji-t berpasangan (p < 0,05).Hasil penelitian menunjukkan pada kelompok perlakuan mengalami peningkatan kekuatanotot hamstring (p = 0,029 pada tungkai kanan dan p = 0,007 pada tungkai kiri), terdapatperbaikan keseimbangan kekuatan otot hamstring kanan dan kiri (p = 0,016), namun tidakada perbaikan rasio kekuatan otot hamstring terhadap quadriseps . Pada kelompok kontrol,tidak terdapat peningkatan kekuatan otot hamstring, tidak ada perbaikan keseimbangan dantidak ada perbaikan rasio kekuatan otot hamstring terhadap quadriseps. Hasil penelitian inimenunjukkan bahwa latihan Nordic hamstring protokol 4 minggu adalah sebuah programlatihan yang efektif untuk memperbaiki faktor risiko cedera yang berperan dalam upayapencegahan cedera otot hamstring.

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ABSTRACTThis research is to establish to know the Nordic hamstring exercise effectiveness as adjuvantexercise to improve injury risk factor on futsal players hamstring muscle. College studentfutsal players (age ranges 18 ? 21 year old) as participant in this research consist of 15players as control group and 16 players as treated one. Treated one conducts routine exerciseand Nordic hamstring exercise for 4 weeks (4 weeks protocol) and control group conductsroutine exercise. Measurement of hamstring and quadriceps muscles strength are measuredbefore and after treatment on both group by using isotonic dynamometer device. Thedifference of the results in both group before and after treatment are managed by usingpaired-t test (p < 0,05).The results shows that treated group improve their hamstring muscle strength (p = 0,029 onright legs and p = 0,007 on the left ones), improve the balance of their left and righthamstring strength (p = 0,016), but there is no improvement on hamstring and quadricepsmuscles strength ratio. On control group, theres is no hamstring muscle strengthimprovement, no balance improvement, and no improvement on hamstring and quadricepsmuscles strength ratio. The result shows that 4 weeks protocol Nordic hamstring exercise is aeffective programme to improve injury risk factor that has a role in preventing hamstringmuscle injury., This research is to establish to know the Nordic hamstring exercise effectiveness as adjuvantexercise to improve injury risk factor on futsal players’ hamstring muscle. College studentfutsal players (age ranges 18 – 21 year old) as participant in this research consist of 15players as control group and 16 players as treated one. Treated one conducts routine exerciseand Nordic hamstring exercise for 4 weeks (4 weeks protocol) and control group conductsroutine exercise. Measurement of hamstring and quadriceps muscles strength are measuredbefore and after treatment on both group by using isotonic dynamometer device. Thedifference of the results in both group before and after treatment are managed by usingpaired-t test (p < 0,05).The results shows that treated group improve their hamstring muscle strength (p = 0,029 onright legs and p = 0,007 on the left ones), improve the balance of their left and righthamstring strength (p = 0,016), but there is no improvement on hamstring and quadricepsmuscles strength ratio. On control group, theres is no hamstring muscle strengthimprovement, no balance improvement, and no improvement on hamstring and quadricepsmuscles strength ratio. The result shows that 4 weeks protocol Nordic hamstring exercise is aeffective programme to improve injury risk factor that has a role in preventing hamstringmuscle injury.]"

"Proyek akhir ini bertujuan untuk membahas secara mendalam mengenai pengaruh Nordic Hamstring Exercise terhadap peningkatan fleksibilitas otot hamstring pada tendangan taekwondo. Penelitian ini dilakukan di sebuah klub taekwondo yang memiliki reputasi baik dalam melatih atlet-atletnya. Metode yang digunakan adalah kuantitatif dengan desain penelitian true eksperimen, yang membagi peserta menjadi dua kelompo, yaitu kelompok eksperimen dan kelompok kontrol. Kelompok kontrol menjalani program latihan rutin yang telah ditetapkan oleh pelatih, sementara kelompok eksperimen menjalankan intervensi tambahan berupa Nordic Hamstring Exercise, yang digabungkan dengan program latihan rutin taekwondo. Hasil penelitian menunjukkan bahwa Nordic Hamstring Exercise secara signifikan mampu meningkatkan fleksibilitas otot hamstring, yang berpengaruh positif dan penunjang terhadap performa tendangan taekwondo. Dengan peningkatan fleksibilitas ini, bagi atlet diharapkan mampu mengurangi risiko cedera dan meningkatkan efisiensi teknik tendangan dalam taekwondo. Penelitian ini memiliki implikasi penting bagi pelatih dan atlet dalam merancang program latihan, baik dari segi efektifitas tendangan dan pencegahan cedera untuk mencapai hasil optimal atlet dalam kompetisi.

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This final project aims to thoroughly discuss the influence of Nordic Hamstring Exercise on the improvement of hamstring muscle flexibility in taekwondo kicks. The research was conducted at a reputable taekwondo club known for training its athletes. The method used is quantitative with a true experimental design, dividing participants into two groups: the experimental group and the control group. The control group underwent a routine training program established by the coach, while the experimental group received an additional intervention in the form of Nordic Hamstring Exercise, combined with the regular taekwondo training program. The results of the study indicate that Nordic Hamstring Exercise significantly improves hamstring muscle flexibility, positively impacting and supporting taekwondo kick performance. With this increase in flexibility, athletes are expected to reduce the risk of injury and enhance the efficiency of their kicking techniques in taekwondo. This research has important implications for coaches and athletes in designing training programs, focusing on both the effectiveness of kicks and injury prevention to achieve optimal results in competitions."