259 Isokinetic profile and contralateral deficit of the lower limbs of artistic gymnastics athletes. (3rd March 2020)

• Record Type: Journal Article
• Authors: Dias, Stefânia Gonçalves; Batista Albuquerque Goulart Lemos, Natália; Lunardi, Morgana; Lemos, Fernando de Aguiar; Dias, Caroline Pieta; Oliva, João Carlos; Vaz, Marco Aurélio
• Is Part Of: British journal of sports medicine. Volume 54(2020)Supplement 1
• Page Start: A107
• Page End: A107
• Publication Date: 2020-03-03
• Subjects: Sports medicine -- Periodicals; 617.1027
• DOI: 10.1136/bjsports-2020-IOCAbstracts.259
• Languages: English
• ISSNs: 0306-3674

Abstract

Abstract : Background: The hamstring/quadriceps (H/Q) functional ratio detects muscle imbalance and monitors knee joint stability, making it a predictor of injury, especially ACL. The injury of this ligament in gymnasts is one of the most incident and of greatest negative impact on recovery and return to sports. Objective: To evaluate functional H/Q at different angular velocities and contralateral deficit of the lower limbs of female artistic gymnastics athletes. Design: Descriptive study. Setting: Federated athletes, participants of competitions at national and international level, in which two were part of the Brazilian Selection of Artistic Gymnastics. Patients (or Participants): Selected through a club in Porto Alegre, Brazil. They had an average of eight years of experience in the modality, minimum frequency of training of six times a week, six hours daily. Participants with any lesion that interfered or made it impossible to perform the evaluations were excluded. Interventions (or assessment of risk factors): Functional H/Q was calculated by dividing the peak of the hamstring eccentric torque by the peak of the quadriceps concentric torque, analyzed using the isokinetic dynamometer (Biodex Medical System). Main outcome measurements: Isokinetic protocol at two speeds: 1) 60°/s and 2) 120°/s; and Waterloo questionnaire to determine dominant member (DM). Results: 10 elite gymnasts were evaluated, (mean±SD age 14.9±3.7 yrs; body mass 45.6±7.0 kg and height 1.51±0.04 m). The DM, as well as the non-dominant (NDM) at the moment 60°/s (0.71±0.09; 0.77±0.12), had values below those established in the literature (functional H/Q ≤ 0.90), at the moment 120°/s were closer to normal (0.85±0.12; 0.88±0.13). 5 of the 10 athletes obtained values within the normal range in the MND at 120°/s. Conclusions: All athletes presented significant thigh muscle imbalance, with functional H/Q values lower than those proposed in the literature, with proximity between the limbs. Strength training program of hamstrings should be considered in order to prevent injuries caused by muscle imbalance.