Plyometric training has shown to improve vertical jump height,but the design and implementation of a plyometric training programme for adolescents requires consideration of several variables as well as the time of the...Plyometric training has shown to improve vertical jump height,but the design and implementation of a plyometric training programme for adolescents requires consideration of several variables as well as the time of the season.The purpose of this study was to implement a pragmatic programme that improves vertical jump height,and to monitor the effects of a 15 week off-season plyometric and resistance training programme on the vertical jump height in adolescent female volleyball players.Ten adolescent female volleyball players(age:15.1±0.9 years,height:1.71±0.04 m,body mass:63.6±6.0 kg,volleyball training experience:5.1±1.4 years)underwent 15 weeks of plyometric and resistance training(twice and once a week,respectively).A single-targeted block periodised approach and a linear periodisation model were applied.Vertical jump height was assessed before the programme(T1),after 4 weeks(T2),after 12 weeks(T3)and at the end of the programme(T4).Jump height significantly increased by 8.8%over the full time of the investigation.No significant difference was found between T1 and T2 but for all other pairwise comparisons.Similarly,leg power was observed to increase by 6.5%(P=0.001).The 15-weeks training programme showed to improve jump height and leg power.In consideration of its practical nature and its results in comparison with similar intervention studies,the programme suggests practical relevance for coaches.展开更多
Purpose This study examined changes in vertical jump performance with progressively greater eccentric pre-loading in relation to growth and development in young female athletes.Methods Twenty young female athletes ran...Purpose This study examined changes in vertical jump performance with progressively greater eccentric pre-loading in relation to growth and development in young female athletes.Methods Twenty young female athletes ranging from 9 to 17 years old performed the following vertical jumps in random order:static jumps(SJs),counter-movement jumps(CMJs),and drop jumps(DJs)from drop heights of 20,30,and 40 cm(DJ20,DJ30,and DJ40,respectively).Measurements included peak force(PF),peak rate of force development(RFD),peak power(PP),eccentric impulse(ECC),and concentric impulse(CON).Measurements of growth included age,maturity offset,height,body mass,fat-free mass,and thigh muscle cross-sectional area(CSA).Results PF increased from the SJ-DJ20(P<0.009),then plateaued from DJ20-DJ40(P=1.000).RFD remained the same from SJ-CMJ(P=1.000),increased from CMJ-DJ20(P<0.001),and plateaued from DJ20-DJ40(P=0.874).PP increased from the SJ-CMJ(P<0.001),then plateaued from the CMJ-DJ40(P≥0.486).CON remained the same across all verti-cal jumps(P=1.000),while ECC increased from the SJ-DJ40(P≤0.038).Jump height(JH)increased from the SJ-CMJ(P<0.001),decreased from CMJ-DJ20(P<0.001),and plateaued from DJ20-DJ40(P=1.000).The change in PP from the SJ-CMJ(ΔCMJ-SJ)was related to all measurements of growth except CSA(r=0.558-0.815).Conclusion Young females produced greater power during the CMJ than SJ,but equivalent power from the CMJ-DJ40,despite increases in ECC.Additionally,ΔCMJ-SJ was not related to CSA,which suggests other underlying mechanisms affect stretch-shortening cycle utilization in young female athletes.展开更多
文摘Plyometric training has shown to improve vertical jump height,but the design and implementation of a plyometric training programme for adolescents requires consideration of several variables as well as the time of the season.The purpose of this study was to implement a pragmatic programme that improves vertical jump height,and to monitor the effects of a 15 week off-season plyometric and resistance training programme on the vertical jump height in adolescent female volleyball players.Ten adolescent female volleyball players(age:15.1±0.9 years,height:1.71±0.04 m,body mass:63.6±6.0 kg,volleyball training experience:5.1±1.4 years)underwent 15 weeks of plyometric and resistance training(twice and once a week,respectively).A single-targeted block periodised approach and a linear periodisation model were applied.Vertical jump height was assessed before the programme(T1),after 4 weeks(T2),after 12 weeks(T3)and at the end of the programme(T4).Jump height significantly increased by 8.8%over the full time of the investigation.No significant difference was found between T1 and T2 but for all other pairwise comparisons.Similarly,leg power was observed to increase by 6.5%(P=0.001).The 15-weeks training programme showed to improve jump height and leg power.In consideration of its practical nature and its results in comparison with similar intervention studies,the programme suggests practical relevance for coaches.
基金Efforts for this study were funded,in part,by the University of Nebraska Agriculture Research Division with funds provided by the Hatch Act(Agency:U.S.Department of Agriculture,National Institute of Food and Agriculture,Accession No:1000080,Project No:NEB-36-078)a grant from Abbott Nutrition,Columbus,OH.
文摘Purpose This study examined changes in vertical jump performance with progressively greater eccentric pre-loading in relation to growth and development in young female athletes.Methods Twenty young female athletes ranging from 9 to 17 years old performed the following vertical jumps in random order:static jumps(SJs),counter-movement jumps(CMJs),and drop jumps(DJs)from drop heights of 20,30,and 40 cm(DJ20,DJ30,and DJ40,respectively).Measurements included peak force(PF),peak rate of force development(RFD),peak power(PP),eccentric impulse(ECC),and concentric impulse(CON).Measurements of growth included age,maturity offset,height,body mass,fat-free mass,and thigh muscle cross-sectional area(CSA).Results PF increased from the SJ-DJ20(P<0.009),then plateaued from DJ20-DJ40(P=1.000).RFD remained the same from SJ-CMJ(P=1.000),increased from CMJ-DJ20(P<0.001),and plateaued from DJ20-DJ40(P=0.874).PP increased from the SJ-CMJ(P<0.001),then plateaued from the CMJ-DJ40(P≥0.486).CON remained the same across all verti-cal jumps(P=1.000),while ECC increased from the SJ-DJ40(P≤0.038).Jump height(JH)increased from the SJ-CMJ(P<0.001),decreased from CMJ-DJ20(P<0.001),and plateaued from DJ20-DJ40(P=1.000).The change in PP from the SJ-CMJ(ΔCMJ-SJ)was related to all measurements of growth except CSA(r=0.558-0.815).Conclusion Young females produced greater power during the CMJ than SJ,but equivalent power from the CMJ-DJ40,despite increases in ECC.Additionally,ΔCMJ-SJ was not related to CSA,which suggests other underlying mechanisms affect stretch-shortening cycle utilization in young female athletes.
