ABSTRAKTujuan penelitian ini adalah untuk mengetahui (1) perbedaan pengaruh latihanhurdle hops dan double leg bound terhadap kemampuan menyundul bola (2) perbedaankemampuan menyundul bola bagi siswa yang memiliki kemampuan awal kekuatan otottungkai tinggi dan kemampuan awal kekuatan otot tungkai rendah (3) interaksi antaralatihan hurdle hops dan double leg bound dan kemampuan awal kekuatan otot tungkaiterhadap kemampuan menyundul bola.Penelitian ini menggunakan metode eksperimen dengan rancangan factorial 2x2.Sampel yang digunakan Siswa SSB Digjayamawana Kabuaten Ciamis, yang berjumlah40 orang sampel dengan purposive random sampling. Kemampuan awal kekuatan otottungkai diperoleh dari perhitungan menggunakan leg dynamometer. Teknik analisis datamenggunakan ANAVA. Sebelum menguji dengan ANAVA, terlebih dulu digunakan ujiprasyarat analisis data dengan menggunakan uji normalitas sampel (Uji Liliefors denganα = 0,05) dan Uji homogenitas varians (Uji Bartlett dengan α = 0,05).Berdasarkan pengolahan dan analisis data menunjukan bahwa (1) Ada perbedaanpengaruh antara latihan Hurdel Hop dan Doubel Leg Bound terhadap peningkatankemampuan menyundul bola, digunakan analisis variansi Two Way. Berdasarkan hasilperhitungan analisis variansi dua jalan, diperoleh Fobservasi = 7.24. Hasil perhitungan inikemudian dikonsultasikan dengan tabel F dengan Dk pembilang = 1 dan Dkpenyebut = 36,dan taraf signifikansi 0,05 diperoleh F tabel = 4,11, karena F observasi> F tabel atau 7.24>4,11, sehingga dapat dikatakan ada perbedaan pengaruh antara latihan Hurdel Hop danDubel Leg Bound terhadap peningkatan kemampuan menyundul bola. (2) ada perbedaanpengaruh kemampuan menyundul bola antara atlet yang memiliki kemampuan awalkekuatan otot tungkai tinggi dengan rendah digunakan analisis variansi Two Way.Berdasarkan hasil perhitungan analisis variansi dua jalan, diperoleh Fobservasi = 21.20.Hasil perhitungan ini kemudian dikonsultasikan dengan tabel F dengan Dk pembilang = 1dan Dkpenyebut = 36, dan taraf signifikansi 0,05 diperoleh F tabel = 4,11, karena F observasi>F tabel atau 21.20> 4,11, sehingga dapat dikatakan ada perbedaan pengaruh kemampuanmenyundul bola antara atlet yang memiliki kemampuan awal kekuatan otot tungkaitinggi dengan rendah. (3) pengaruh interaksi antara latihan Plyometrics dankemampuan awal kekuatan otot tungkai terhadap peningkatan kemampuan menyundulbola, digunakan analisis variansi two Way. Berdasarkan hasil perhitungan analisisvariansi dua jalan, diperoleh Fobservasi = 0.61, Hasil perhitungan ini kemudiandikonsultasikan dengan tabel F dengan Dk pembilang = 1 dan Dkpenyebut = 36, dan tarafsignifikansi 0,05 diperoleh F tabel = 4,11, karena F observasi> F tabel atau 0.61< 4,11,sehingga dapat dikatakan tidak ada pengaruh interaksi Antara latihan Plyometrics dankemampuan awal kekuatan otot tungkai terhadap peningkatan kemampuan menyundulbola.Ada perbedaan pengaruh yang signifikan antara latihan plyometrics Hurdel Hopdan Doubel Leg Bound terhadap peningkatan kemampuan menyundul bola. Pengaruhlatihan Doubel Leg Bound mempunyai peningkatan kemampuan menyundul bola lebihbaik dari pada latihan Hurdel Hop untuk peningkatan menyundul bola. Ada perbedaanhasil menyundul bola yang signifikan antara atlet yang memiliki kemampuan awalkekuatan otot tungkai tinggi dan rendah. Peningkatan hasil menyundul bola pada atletyang memiliki kemampuan awal kekuatan otot tungkai tinggi lebih baik dari atlet yangmemiliki kemampuan awal kekuatan otot tungkai rendah. Tidak ada pengaruh interaksiyang signifikan antara latihan plyometrics dan kekuatan otot tungkai terhadap peningkatankemampuan menyundul bola.Kata-kata kunci : latihan hurdhel hop, latihan double leg bound, kemampuan awalkekuatan otot tungkai tinggi, dan rendahABSTRACTThe purpose of this study was to determine (1) The differences of the effects ofhurdle hops and double leg bound exercises to the heading ability (2) The differences ofstudents heading ability between the students who have prior ability of high leg musclestrength and the students who have prior ability of low leg muscle strength (3)interaction between hurdle hops and double leg bound exercise and early ability of legmuscle strength to the students’ heading ability.This study used an experimental method with 2x2 factorial designs. The sampleused SSB Digjayamawana students in Ciamis District, totaling 40 samples withpurposive random sampling. The initial ability of leg muscle strength derived fromcalculations using a leg dynamometer. Data were analyzed using ANOVA. Before thetest with ANOVA, first used the prerequisite test data analysis using the samplenormality test (Test Liliefors with α = 0.05) and test homogeneity of variance (Bartletttest with α = 0.05).Based on the processing and analysis of data shows that (1) There is a differencebetween the effects of Hurdel Hop and Doubel Leg Bound exercises to the increased ofheading ability, used analysis of variance Two Way. Based on the results of two waysvariance analysis calculation, obtained ????????????????????????????????????????= 7.24. The result of this calculation isthen consulted with ???????????????????????? with Dk numerator = 1 and Dkpenyebut = 36, and a significancelevel of 0.05 was obtained ???????????????????????? = 4.11, for observation F> ????????????????????????or 7:24> 4.11, Basedon the test, we can find that there is a difference between the effect of the Hop Hurdeland Dubel Leg Bound exercises to the heading ability increased. (2) There aredifferences that influence the heading ability between the students who have priorability of high leg muscle strength and the athletes who have prior ability of low legmuscle strength used analysis of variance Two Way. Based on the results of two waysvariance analysis calculation, obtained Fobservasi = 21:20. The result of this calculation isthen consulted with ???????????????????????? with Dk numerator = 1 and Dkpenyebut = 36, and a significancelevel of 0.05 was obtained ???????????????????????? = 4.11, for observation F> ???????????????????????? or 21:20> 4.11, so wecan say there is a difference ability to influence the ball between the athletes who haveprior knowledge of high strength with low leg muscle. (3) the effect of the interactionbetween Plyometrics exercises and initial ability of leg muscle strength to increase theheading ability, used analysis of variance two Way. Based on the results of two waysvariance analysis calculation, obtained Fobservasi = 0.61, this calculation results wereconsulted with ???????????????????????? with Dk numerator= 1 and Dkpenyebut = 36, and a significance level of0.05 was obtained ???????????????????????? = 4.11, for observation F> ???????????????????????? or 0.61 <4.11, so it can be saidthere is no interaction effect between Plyometrics exercises and initial ability of legmuscle strength to increase the heading ability.There is a significant difference The influence of plyometrics exercises betweenHurdel Hop And Doubel Leg Bound To increase the ability of the ball . Bound Legexercises influence Doubel have an increased ability to head the ball Better From at HopHurdel exercise to review the increase ball . There is a difference findings Significantlyball between athlete has the ability early strength of leg muscles high and low .Improved results The ball in athletes have the ability early high leg muscle strengthBetter From The athletes have the ability Preliminary leg muscle strength was low. nosignificant effect Its Interaction between plyometrics exercises and leg muscle strengthagainst an increase in the ability of the ball .Key Word : hurdhel hop exercises, double leg bound exercises, prior ability of high legmuscle strength and prior ability of low leg muscle strength