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Biomechanical differences between unilateral and bilateral landings from a jump: gender differences.
Clin J Sport Med. 2007 Jul; 17(4):263-8.CJ

Abstract

OBJECTIVE

To determine the effect of landing type (unilateral vs. bilateral) and gender on the biomechanics of drop landings in recreational athletes.

DESIGN

This study used a repeated measures design to compare bilateral and unilateral landings in male and female athletes. A repeated measures multivariate analysis of variance (type of landing*gender) was performed on select variables.

SETTING

Biomechanics laboratory.

PARTICIPANTS

Sixteen female and 16 male recreational athletes.

MAIN OUTCOME MEASURES

Kinetic, kinematic, and electromyographic (EMG) data were collected on participants while performing bilateral and unilateral landings from a 40-cm platform.

RESULTS

Compared to bilateral landings, subjects performed unilateral landings with increased knee valgus, decreased knee flexion at initial contact, decreased peak knee flexion, decreased relative hip adduction, and increased normalized EMG of the rectus femoris, medial hamstrings, lateral hamstrings, and medial gastrocnemius (P < 0.005). During both types of landing, females landed with increased knee valgus and normalized vertical ground reaction force (VGRF) compared to males (P < 0.009), however, the interaction of landing type*gender was not significant (P = 0.29).

CONCLUSIONS

Compared to bilateral landings, male and female recreational athletes performed unilateral landings with significant differences in knee kinematic and EMG variables. Female athletes landed with increased knee valgus and VGRF compared to males during both types of landing.

Authors+Show Affiliations

Division of Physical Therapy, Long Island University, Brooklyn, NY 11201, USA. evangelos.pappas@liu.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

17620779

Citation

Pappas, Evangelos, et al. "Biomechanical Differences Between Unilateral and Bilateral Landings From a Jump: Gender Differences." Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine, vol. 17, no. 4, 2007, pp. 263-8.
Pappas E, Hagins M, Sheikhzadeh A, et al. Biomechanical differences between unilateral and bilateral landings from a jump: gender differences. Clin J Sport Med. 2007;17(4):263-8.
Pappas, E., Hagins, M., Sheikhzadeh, A., Nordin, M., & Rose, D. (2007). Biomechanical differences between unilateral and bilateral landings from a jump: gender differences. Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine, 17(4), 263-8.
Pappas E, et al. Biomechanical Differences Between Unilateral and Bilateral Landings From a Jump: Gender Differences. Clin J Sport Med. 2007;17(4):263-8. PubMed PMID: 17620779.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biomechanical differences between unilateral and bilateral landings from a jump: gender differences. AU - Pappas,Evangelos, AU - Hagins,Marshall, AU - Sheikhzadeh,Ali, AU - Nordin,Margareta, AU - Rose,Donald, PY - 2007/7/11/pubmed PY - 2007/9/21/medline PY - 2007/7/11/entrez SP - 263 EP - 8 JF - Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine JO - Clin J Sport Med VL - 17 IS - 4 N2 - OBJECTIVE: To determine the effect of landing type (unilateral vs. bilateral) and gender on the biomechanics of drop landings in recreational athletes. DESIGN: This study used a repeated measures design to compare bilateral and unilateral landings in male and female athletes. A repeated measures multivariate analysis of variance (type of landing*gender) was performed on select variables. SETTING: Biomechanics laboratory. PARTICIPANTS: Sixteen female and 16 male recreational athletes. MAIN OUTCOME MEASURES: Kinetic, kinematic, and electromyographic (EMG) data were collected on participants while performing bilateral and unilateral landings from a 40-cm platform. RESULTS: Compared to bilateral landings, subjects performed unilateral landings with increased knee valgus, decreased knee flexion at initial contact, decreased peak knee flexion, decreased relative hip adduction, and increased normalized EMG of the rectus femoris, medial hamstrings, lateral hamstrings, and medial gastrocnemius (P < 0.005). During both types of landing, females landed with increased knee valgus and normalized vertical ground reaction force (VGRF) compared to males (P < 0.009), however, the interaction of landing type*gender was not significant (P = 0.29). CONCLUSIONS: Compared to bilateral landings, male and female recreational athletes performed unilateral landings with significant differences in knee kinematic and EMG variables. Female athletes landed with increased knee valgus and VGRF compared to males during both types of landing. SN - 1050-642X UR - https://www.unboundmedicine.com/medline/citation/17620779/Biomechanical_differences_between_unilateral_and_bilateral_landings_from_a_jump:_gender_differences_ L2 - https://doi.org/10.1097/JSM.0b013e31811f415b DB - PRIME DP - Unbound Medicine ER -