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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
Marilia DOS SANTOS ANDRADE 1, Naryana C. MASCARIN 1, Roberta FOSTER 2, Zsuzsanna I. DE JARMY DI BELLA 2, Rodrigo L. VANCINI 3, Claudio A. DE LIRA 4
1 Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil; 2 Departamento de Ginecologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil; 3 Centro de Educação Física e Desportos, Universidade Federal do Espírito Santos, Vitória, ES, Brazil; 4 Setor de Fisiologia Humana e do Exercício, Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiânia, GO, Brazil
BACKGROUND: Muscular strength imbalance is an important risk factor for ACL injury, but it is not clear the impact of menstrual cycle on muscular strength balance. Our aims were to verify whether muscular balance (hamstring-to-quadriceps peak torque strength balance ratio) during menstrual cycle (luteal and follicular phases) and compare gender differences relative to strength balance to observe possible fluctuations in strength balance ratio.
METHODS: Thirty-eight soccer athletes (26 women and 12 men) took part in this study. Athletes participated in two identical isokinetic strength evaluations for both knee (non-dominant: ND and dominant: D). Peak torque for quadriceps and hamstring muscles were measured in concentric mode and hamstring-to-quadriceps peak torque strength balance ratio calculated.
RESULTS: Women had significantly lower hamstring-to-quadriceps peak torque strength balance ratio during the follicular compared to luteal phase, for the ND limb (p=0.011). However, no differences, between luteal and follicular phases, were observed in the D limb. In men, no difference in strength balance ratios was found between the ND and D limbs.
CONCLUSIONS: These data may be useful in prevention programs for knee (ACL) injuries among soccer female athletes.