Jack Dix1, Stephanie Marsh2, Bart Dingenen3, Peter Malliaras4. 1. Peninsula Sports Medicine Group, Nepean Hwy Edithvale, 3196, Australia. Electronic address: jack.dix@tsic.com.au. 2. Peninsula Sports Medicine Group, Nepean Hwy Edithvale, 3196, Australia. Electronic address: stephanie.marsh@psmgroup.com.au. 3. UHasselt, Faculty of Medicine and Life Sciences, Biomedical Research Institute, Agoralaan, 3590, Diepenbeek, Belgium. Electronic address: bart.dingenen@uhasselt.be. 4. Department of Physiotherapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, PO Box 527, Frankston Vic, 3199, Australia. Electronic address: peter.malliaras@monash.edu.au.
Abstract
OBJECTIVE: To systematically review literature investigating the relationship between hip muscle strength and dynamic lower extremity valgus during movement tasks in asymptomatic females. METHODS: Four databases (CINAHL, SPORTDiscus, Embase and Ovid MEDLINE) were searched in February 2017. Studies investigating the relationship between hip muscle strength and dynamic knee or lower extremity valgus during movement tasks among asymptomatic females over 18 years old were included. Meta-analyses were performed where two or more studies used similar tasks. RESULTS: Five studies reported no relationship between hip strength and dynamic lower extremity valgus. Greater peak lower extremity valgus was associated with reduced hip strength in eight studies, and greater hip strength in three studies. In the meta-analysis, a relationship between weaker hip strength and greater dynamic lower extremity valgus was found for ballistic single leg landing, but not double leg landing or single leg squat tasks. CONCLUSIONS: Although the relationship between hip strength and dynamic lower extremity valgus is conflicting, meta-analysis revealed lower extremity dynamic valgus was consistently associated with hip strength in single leg ballistic tasks, but not double leg ballistic or single leg squat tasks. The relationship between hip strength and dynamic lower extremity valgus may be conditional to task demand.
OBJECTIVE: To systematically review literature investigating the relationship between hip muscle strength and dynamic lower extremity valgus during movement tasks in asymptomatic females. METHODS: Four databases (CINAHL, SPORTDiscus, Embase and Ovid MEDLINE) were searched in February 2017. Studies investigating the relationship between hip muscle strength and dynamic knee or lower extremity valgus during movement tasks among asymptomatic females over 18 years old were included. Meta-analyses were performed where two or more studies used similar tasks. RESULTS: Five studies reported no relationship between hip strength and dynamic lower extremity valgus. Greater peak lower extremity valgus was associated with reduced hip strength in eight studies, and greater hip strength in three studies. In the meta-analysis, a relationship between weaker hip strength and greater dynamic lower extremity valgus was found for ballistic single leg landing, but not double leg landing or single leg squat tasks. CONCLUSIONS: Although the relationship between hip strength and dynamic lower extremity valgus is conflicting, meta-analysis revealed lower extremity dynamic valgus was consistently associated with hip strength in single leg ballistic tasks, but not double leg ballistic or single leg squat tasks. The relationship between hip strength and dynamic lower extremity valgus may be conditional to task demand.
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