Biomechanical Difference between Loaded Countermovement and Static Squat Jumps

S. G. S. Coleman; C. Karatzaferi; Michael H. Stone

Biomechanical Difference between Loaded Countermovement and Static Squat Jumps

S. G. S. Coleman
, C. Karatzaferi
, Michael H. Stone

The University of Edinburgh

Research output: Contribution to conference › Presentation

Abstract

It was the aim of this study to assess differences between countermovement (CMJ) and static (SJ) unloaded and loaded squat jumps. Eight male national/international level athletes and badminton players performed a series of jumps on two Kistler force plates. Maximum vertical force (Fmax) and rate of force development (RFDmax), net impulse (Impnet) and vertical take-off velocity (VT-O) were calculated and compared using a Two-Way (Jump x Load) ANOVA with two repeated factors. Fmax increased significantly with load and displayed a significant interaction with jump type. RFDmax showed significant jump main and interaction effects. Impnet only changed significantly with load. These results may lend credence to the spinal reflex or elastic energy theory of enhanced CMJ performance.

Original language	American English
State	Published - Jun 2001
Externally published	Yes
Event	International Society of Biomechanics in Sports Annual Meeting - San Francisco, CA Duration: Jun 1 2001 → …

Conference

Conference	International Society of Biomechanics in Sports Annual Meeting
Period	6/1/01 → …

Keywords

biomechanical differences
squat jumps

Disciplines

Sports Medicine

Access to Document

BIOMECHANICAL-DIFFERENCES-BETWEEN-LOADED-COUNTERMOVEMENT-AND.pdfFinal published version, 120 KBLicense: Unspecified

Cite this

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title = "Biomechanical Difference between Loaded Countermovement and Static Squat Jumps",

abstract = " It was the aim of this study to assess differences between countermovement (CMJ) and static (SJ) unloaded and loaded squat jumps. Eight male national/international level athletes and badminton players performed a series of jumps on two Kistler force plates. Maximum vertical force (Fmax) and rate of force development (RFDmax), net impulse (Impnet) and vertical take-off velocity (VT-O) were calculated and compared using a Two-Way (Jump x Load) ANOVA with two repeated factors. Fmax increased significantly with load and displayed a significant interaction with jump type. RFDmax showed significant jump main and interaction effects. Impnet only changed significantly with load. These results may lend credence to the spinal reflex or elastic energy theory of enhanced CMJ performance.",

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T1 - Biomechanical Difference between Loaded Countermovement and Static Squat Jumps

AU - Coleman, S. G. S.

AU - Karatzaferi, C.

AU - Stone, Michael H.

PY - 2001/6

Y1 - 2001/6

N2 - It was the aim of this study to assess differences between countermovement (CMJ) and static (SJ) unloaded and loaded squat jumps. Eight male national/international level athletes and badminton players performed a series of jumps on two Kistler force plates. Maximum vertical force (Fmax) and rate of force development (RFDmax), net impulse (Impnet) and vertical take-off velocity (VT-O) were calculated and compared using a Two-Way (Jump x Load) ANOVA with two repeated factors. Fmax increased significantly with load and displayed a significant interaction with jump type. RFDmax showed significant jump main and interaction effects. Impnet only changed significantly with load. These results may lend credence to the spinal reflex or elastic energy theory of enhanced CMJ performance.

AB - It was the aim of this study to assess differences between countermovement (CMJ) and static (SJ) unloaded and loaded squat jumps. Eight male national/international level athletes and badminton players performed a series of jumps on two Kistler force plates. Maximum vertical force (Fmax) and rate of force development (RFDmax), net impulse (Impnet) and vertical take-off velocity (VT-O) were calculated and compared using a Two-Way (Jump x Load) ANOVA with two repeated factors. Fmax increased significantly with load and displayed a significant interaction with jump type. RFDmax showed significant jump main and interaction effects. Impnet only changed significantly with load. These results may lend credence to the spinal reflex or elastic energy theory of enhanced CMJ performance.

KW - biomechanical differences

KW - squat jumps

M3 - Presentation

T2 - International Society of Biomechanics in Sports Annual Meeting

Y2 - 1 June 2001

ER -