VERTICAL JUMP HEIGHT

Vertical Jump Height

Abstract

Recent study illustrates that extending former to personal undertaking declines performance. However, these extending attack are not agent of athletes throughout moderately hot up methods, as they are generally time consuming. The objective of the present study was to analyze if the length of acute static extending is to blame for deficiency in isokinetic top torque production.

Fourteen juvenile, male, gifted, semiprofessional Athletes players, from distinct Greek first nationwide partition groups, with an mean age of 18.5±0.6 years, size of 177.6±4.3 centimetres, body mass of 70.8±3.5 kg and 8.4±0.5 years of teaching, were randomly chosen to become involved the study. All participants presented three static extending protocols, in nonconsecutive teaching session. The first extending protocol was presented one time for 30 s (volume 30), the second 10 times for 30 s (volume 300) and the third 16 times for 30 s (volume 480). Range of shift (ROM) was very resolute throughout knee flexion, utilising a goniometer. The top torque of the superior leg extensors was assessed on a Cybex NORM dynamometer at angular velocities of 60, 90, 150, 210 and 270 °·s-1. The outcomes of the statistical investigation demonstrated that top torque stayed unchanged next the static extending for 30 s in all angular velocities, while it declined (P<0.01 to P<0.001) next the static extending for 5 or 8 min in all angular velocities. The outcome propose that a lone extend (training capacity 30 s) does not make declines in top torque in evaluation to multiple extends (training capacity 480 s).

Table of Content

ABSTRACTII

CHAPTER 01: INTRODUCTION1

Background of the Research1

Problem Statement1

Aim1

Research question:3

Null Hypothesis3

Alternate Hypothesis4

Significance4

Hypothesis4

CHAPTER 02: LITERATURE REVIEW5

Jump performance and power output10

CHAPTER 03: METHODOLOGY28

Research Method28

Subjects29

Instrumentation29

Procedures30

Subjects31

Equipment31

Procedures32

Statistical analysis32

CHAPTER 05: ANALYSIS34

CHAPTER 05: CONCLUSION41

REFERENCES42

CHAPTER 01: INTRODUCTION

Background of the Research

Stretching throughout warm-up has become a customary perform in organising for workout or athletic happenings (Beaulieu, 1981). Although static extending has been discovered to be productive in making an acute boost in ROM in a junction (McNair and Stanley, 1996; Wiemann and Hahn, 1997; Zakas, 2005), latest investigations have shown that static extending may furthermore outcome in a important acute decrease of 5-30% power (Cramer et al., 2004; Nelson et al., 2001; Behm et al., 2001; Fowles et al., 2000; Kokkonen et al., 1998) and power output (Cornwell et al., 2001) of the extended sinew groups.

Problem Statement

Routine static extend lasting 45 s (3×15 s) was utilised by Knudson et al. (2001), who discovered no important decline in leaping performance. Power et al. (2004) furthermore utilised static extending of a long length (e.g. 270 s), and discovered 9.5% declines in the maximal isometric force of the quadriceps, but not in leaping performance.

Aim

The objective of this study is to see if pre-performance stretching or a extended events of stretching will increase one-by-one upright leap height. Athletes have attempted pre-performance stretching for numerous years as part of their moderately hot up routines. However, previous research has shown that it may have a detrimental result on performance. (N. A. Maffiuletti, 2000) discovered that pre-performance stretching had an adverse sway ...