A Probe Into The Relationship Between Jumping Ability And Fitness Of Some Youth Male Basketball Players

Purpose: Basketball sports is a kind of sports items which requires very good body quality,especially excellent jumping ability. However, what correlation and differentiation exist on there between the jumping ability and the body quality?How to select the most effective means of training and how to make it better and to innovate it in order to improve on jumping ability is still a research subject which urgently waited to be solved. Through study between jumping ability and body quality of basketball player, this essay seek for the correspording relationship between them so as to realize the essence of jumping ability more deeply and to estimate kind of training method and training means more objective and roundly, then provide theory basis for innovating and designing more purposive and more rational means of training.Methods: thirty-two male collegiate basketball athletes who are studing in Department of P·E of 2004 grade in Wuhan Institute of Physical Education participated as subjects in this study.taking the score of no run-up jumping, run-up double-feet jumping and run-up one-feet jumping as the dependent variable,and taking twenty indices of body quality tested which reflect strength and rate ablity of the subjects as independent variable.then do regression analysis and correlation analysis between the jumping ability and the body quality.Results: 1)The regression equation between the no-run-up jumping and the body quality: Y1 = 93.976– 14.117 X11 + 18.494 X3 + 0.609 X1 ;2) The regression equation between the run-up double-feet jumping and the body quality: Y2 = 366.454– 43.739 X11– 3.715 X16 ;3) The regression equation between the run-up one-feet jumping and the body quality: Y3 = 84.106 + 1.446 X2– 6.411 X11– 2.073 X16 ;4)The follow is induced by correlation analysis:there are high degree relativity between the jumping ability and X11 ,X12 ,X1 ,X2 , X9 ,X10 ,X13 ,X14 ,X3 ,X5 ,X16 ;there are middling degree relativity between the jumping ability and X7 ,X8 ,X18 ;there are no relativity between the jumping ability and X4 ,X6 ,X15 ,X17 ,X19 ,X20 .Conclusion:1) There have the highist degree relativity between the jumping ability and"moderate loaded extending-body jerk". Obvious defference between"moderate loaded extending-body jerk"and"jerk"is the former having a process of extending hip joint quikly in large range and center of the body ascending at all times while extending knee joint,which is more conformist with jumping in baskeball sports about biomechanics mechanism—strength character and mode to exert the force. There also have differentiataion between"extending-body jerk"and"knee-half-bent squat". Because the former is in company with putting up arm while lifting bar,but the later is not so.It is the most valid way to improve on jumping ability with strength training in company with extension of hip joint and arm quikly in large range. 2) There have highist degree relativity between the no-run-up jumping and"peak loaded knee-half-bent squat",but"peak loaded knee-full-bent squat"is not so.It proved that quikly jumping capability basis on the maximal strength exerted by extending knee joint and hip joint in concordant with the jumping in basketball sport. 3)It is also very high degree of correlation between jumping ability and"double-foot drop jumps"and"one-foot drop jumps"which require very good response strength produced by extending knee joint and ankle joint. So the response strength produced by extending knee joint and ankle joint is vital to jumping ability. 4) Comparing"60m- accelerating-run"to"30m- accelerating-run",the former have higher degree of correlation with jumping ability , because it demand for more excellent acceleration capability and coordination which influence jumping ability deeply. 5) By doing correlation analysis,we find that there are very high degree of correlation between jumping ability and"moderate loaded straight -knee jack heel"and"moderate loaded bend -knee jack heel".but"peak loaded straight -knee jack heel"and"peak loaded bend -knee jack heel"are medium degree of correlation instead of high degree. It proved that speed strength exerted by extending ankle joint is more important than maximal strength . However, straight–knee and bend–knee are not significant difference . 6) By grouping the subjects according to the scores of juming, we found that jumping ability are close correlative to the body quality expressed by"moderate loaded extending-body jerk","peak loaded knee-half-bent squat","drop jumps","60m- accelerating-run","moderate loaded jack heel"and so on.