LOAD-POWER RELATIONSHIP DURING A COUNTERMOVEMENT JUMP: A JOINT LEVEL ANALYSIS

被引:6
作者
Williams, Kym J. [1 ,2 ,3 ]
Chapman, Dale W. [2 ,4 ]
Phillips, Elissa J. [5 ]
Ball, Nick B. [2 ]
机构
[1] Australian Inst Sport, Strength & Conditioning, Bruce, Australia
[2] Univ Canberra, Res Inst Sport & Exercise, Bruce, Australia
[3] Flinders Univ S Australia, Coll Educ Psychol & Social Work, Bedford Pk, SA, Australia
[4] Australian Inst Sport, Physiol, Bruce, Australia
[5] Australian Inst Sport, Movement Sci, Bruce, Australia
关键词
jump profiling; force-velocity relationship; optimal load; BODY RESISTANCE EXERCISES; ATHLETIC PERFORMANCE; MAXIMUM STRENGTH; PEAK POWER; SQUATS; OUTPUT; MUSCLE; FORCE; SPECIFICITY; ABILITY;
D O I
10.1519/JSC.0000000000002432
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
This study aimed to investigate whether hip, knee, and ankle peak power is influenced by the relative load lifted, altering the joint and system load-power relationship during a countermovement jump (CMJ). Twenty-three male national representative athletes (age: 20.3 +/- 3.1 years, squat 1 repetition maximum [1RM]: 133.8 +/- 24.8 kg) completed 3 CMJs at relative barbell loads of 0, 10, 20, 30, and 40% of an athlete's estimated back squat 1RM. Ground reaction force and joint kinematics were captured using a 16 camera motion capture array integrated with 2 in-ground triaxial force plates. Hip ((x) over tilde = 20%, range 0. 40%), knee ((x) over tilde = 0%, 0. 20%), and ankle ((x) over tilde = 40%, 0. 40%) peak power was maximized at different percentages of absolute strength, with an athlete-dependent variation in load-power profiles observed across all lower-body joints. A decrease in system (body + barbell mass) peak power was significantly (p <= 0.05, r = 0.45) correlated with a reduction in knee peak power. Timing of instantaneous system and hip peak power occurred significantly closer to toe-off as load increased. The findings highlight that the generation and translation of lower-body joint power is influenced by external load and athlete-dependent traits. This subsequently alters the load-power profile at a system level, explaining the broad spectrums of loads reported to optimize system power during a CMJ. When training, we recommend that a combination of barbell loads based on assorted percentages of the estimated 1RM be prescribed to optimize joint and system power during a CMJ.
引用
收藏
页码:955 / 961
页数:7
相关论文
共 40 条
[1]   Ability of closed and open kinetic chain tests of muscular strength to assess functional performance [J].
Augustsson, J ;
Thomeé, R .
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS, 2000, 10 (03) :164-168
[2]  
Baker D, 2001, J STRENGTH COND RES, V15, P92
[3]   Repeatability of gait data using a functional hip joint centre and a mean helical knee axis [J].
Besier, TF ;
Sturnieks, DL ;
Alderson, JA ;
Lloyd, DG .
JOURNAL OF BIOMECHANICS, 2003, 36 (08) :1159-1168
[4]   OPTIMAL LOADING FOR THE DEVELOPMENT OF PEAK POWER OUTPUT IN PROFESSIONAL RUGBY PLAYERS [J].
Bevan, Huw R. ;
Bunce, Paul J. ;
Owen, Nick J. ;
Bennett, Mark A. ;
Cook, Christian J. ;
Cunningham, Dan J. ;
Newton, Robert U. ;
Kilduff, Liam P. .
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 2010, 24 (01) :43-47
[5]  
Bobbert M F, 2001, Exerc Sport Sci Rev, V29, P95, DOI 10.1097/00003677-200107000-00002
[6]   Effects of Isometric Scaling on Vertical Jumping Performance [J].
Bobbert, Maarten F. .
PLOS ONE, 2013, 8 (08)
[7]   ACCURACY OF DETERMINING THE POINT OF FORCE APPLICATION WITH PIEZOELECTRIC FORCE PLATES [J].
BOBBERT, MF ;
SCHAMHARDT, HC .
JOURNAL OF BIOMECHANICS, 1990, 23 (07) :705-710
[8]   COORDINATION IN VERTICAL JUMPING [J].
BOBBERT, MF ;
SCHENAU, GJV .
JOURNAL OF BIOMECHANICS, 1988, 21 (03) :249-262
[9]   MECHANICAL OUTPUT ABOUT THE ANKLE JOINT IN ISOKINETIC PLANTAR FLEXION AND JUMPING [J].
BOBBERT, MF ;
SCHENAU, GJV .
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE, 1990, 22 (05) :660-668
[10]  
Bourque PJ, 2003, DETERMINANTS LOAD PE, P112