Meijer, M. (Michelle) (2015) The effect of fatigue, anticipation and sex on landing biomechanics in drops jumps followed by running in three directions. A randomized controlled trial. thesis, Human Movement Sciences.
Full text available on request.Abstract
Background: Numerous studies have shown that anterior cruciate ligament (ACL) injuries take place more often in the end of the game, day or season. This suggests that neuromuscular fatigue is an indirect potential risk factor for ACL injuries. It has thereby been reported that males use another landing technique than females and this was increased by fatigue. The combination of a jump and decision-making followed by running makes the research condition more sports realistic. Objective: To examine the influence of fatigue, anticipation and sex on the technique of a drop jump followed by running in three directions. Method: Thirty-two recreational athletes (16 males and 16 females) conducted anticipated and unanticipated double legged drop-jumps, followed by running to the left, straight or to the right, depending on the light indication prior to landing plates. They performed 30 jump trials in the pre-fatigue condition and 30 jump trials in the post-fatigue condition. Subjects in the experimental (EXP) group were exposed to a fatigue protocol. To investigate if angles and moments are influenced by sex, fatigue and anticipation and the interaction between them, a MANOVA procedure was used. Results: Subjects reached after the fatigue protocol on average 78.98% of their maximum jump height. The control (CTRL) group showed a significant greater hip flexion angle and a smaller ankle dorsiflexion moment and ankle range of motion (RoM) than the EXP group. The unanticipated condition results in greater knee flexion angles and moments and hip and ankle RoM than the anticipated condition. Males showed a significant greater knee flexion and abduction moment, vertical ground reaction force (vGRF) and ankle dorsiflexion moment than females. Females showed a significant greater hip and ankle flexion angle. Conclusion: There is an effect of fatigue on parameters that negatively affect the risk of ACL injuries. There is also an effect of anticipation on biomechanics that provide a stiffer landing. Key words: Anterior cruciate ligament, jump-landing technique, anticipation, fatigue
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Benjaminse, A. and Otten, B. |
| Faculty: | Medical Sciences |
| Date Deposited: | 15 Apr 2022 12:48 |
| Last Modified: | 15 Apr 2022 12:48 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3098 |
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