Abstract
The purpose of this investigation was to examine ground reaction forces and dominant leg kinematics during a run followed by a rapid stop and a vertical jump. Eight elite collegiate basketball players performed three trials each. Three high speed video cameras recorded the position of selected anatomical markers while force data were recorded. Vertical ground reaction force at impact ranged from 1.6 to 4.25 times body weight. The pattern of the waveform was unimodal in three cases and bimodal in five. Anterior-posterior ground reaction forces at impact ranged from 0.5 to 2.5 times body weight. Five subjects demonstrated flexion at the hip during the landing phase. The other subjects maintained a constant hip angle until the propulsion phase of the jump was initiated. The subjects contacted the ground with the knee approximately ten degrees from full extension. The knee then underwent rapid flexion. VGRF is similar to that reported in the literature for landing from a jump. APGRF is markedly larger than that seen in running. The effect of this force on joint kinetics and possible joint injury needs to be examined.
| Original language | English |
|---|---|
| Pages (from-to) | 1082 |
| Number of pages | 1 |
| Journal | Journal of Biomechanics |
| Volume | 22 |
| Issue number | 10 |
| State | Published - 1989 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Orthopedics and Sports Medicine
Cite this
Ground reaction forces and dominant leg kinematics during a rapid stop and jump. / Shapiro, Robert; Threlkeld, Joseph; Ray, J. Michael.
In: Journal of Biomechanics, Vol. 22, No. 10, 1989, p. 1082.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ground reaction forces and dominant leg kinematics during a rapid stop and jump
AU - Shapiro, Robert
AU - Threlkeld, Joseph
AU - Ray, J. Michael
PY - 1989
Y1 - 1989
N2 - The purpose of this investigation was to examine ground reaction forces and dominant leg kinematics during a run followed by a rapid stop and a vertical jump. Eight elite collegiate basketball players performed three trials each. Three high speed video cameras recorded the position of selected anatomical markers while force data were recorded. Vertical ground reaction force at impact ranged from 1.6 to 4.25 times body weight. The pattern of the waveform was unimodal in three cases and bimodal in five. Anterior-posterior ground reaction forces at impact ranged from 0.5 to 2.5 times body weight. Five subjects demonstrated flexion at the hip during the landing phase. The other subjects maintained a constant hip angle until the propulsion phase of the jump was initiated. The subjects contacted the ground with the knee approximately ten degrees from full extension. The knee then underwent rapid flexion. VGRF is similar to that reported in the literature for landing from a jump. APGRF is markedly larger than that seen in running. The effect of this force on joint kinetics and possible joint injury needs to be examined.
AB - The purpose of this investigation was to examine ground reaction forces and dominant leg kinematics during a run followed by a rapid stop and a vertical jump. Eight elite collegiate basketball players performed three trials each. Three high speed video cameras recorded the position of selected anatomical markers while force data were recorded. Vertical ground reaction force at impact ranged from 1.6 to 4.25 times body weight. The pattern of the waveform was unimodal in three cases and bimodal in five. Anterior-posterior ground reaction forces at impact ranged from 0.5 to 2.5 times body weight. Five subjects demonstrated flexion at the hip during the landing phase. The other subjects maintained a constant hip angle until the propulsion phase of the jump was initiated. The subjects contacted the ground with the knee approximately ten degrees from full extension. The knee then underwent rapid flexion. VGRF is similar to that reported in the literature for landing from a jump. APGRF is markedly larger than that seen in running. The effect of this force on joint kinetics and possible joint injury needs to be examined.
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M3 - Article
VL - 22
SP - 1082
JO - Journal of Biomechanics
JF - Journal of Biomechanics
SN - 0021-9290
IS - 10
ER -