Differences in handgrip strength-endurance and muscle activation between young male judo athletes and untrained individuals
| Autor: | Emerson Franchini, Julio Cesar Barbosa de Lima Pinto, Arnaldo Luis Mortatti, Renêe de Caldas Honorato, Jerusa Petróvna Resende Lara, André Igor Fonteles |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
medicine.medical_specialty Adolescent Body height Physical Therapy Sports Therapy and Rehabilitation Isometric exercise Muscle Strength Dynamometer Physical strength Functional Laterality Muscle coactivation Internal medicine Isometric Contraction medicine Humans Orthopedics and Sports Medicine Sexual Maturation Child Muscle Skeletal Young male biology Anthropometry Hand Strength business.industry Athletes Electromyography Muscle activation General Medicine biology.organism_classification ESPORTES medicine.anatomical_structure Cross-Sectional Studies Nephrology Muscle Fatigue Cardiology Physical Endurance Early adolescents business human activities Martial Arts Physical Conditioning Human |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Purpose: The aim of this study was to compare strength-endurance handgrip performance and muscle coactivation between judo athletes and untrained young males. Method: The sample was 38 judo athletes and 38 untrained young males, between 12 and 15 years-old. Maturational status was evaluated by age at peak height velocity. A maximal isometric handgrip test (three 5-s repetitions, with 90-s intervals) and an isometric strength-endurance handgrip test (ten 10-s all-out isometric handgrip repetitions, 20-s intervals) was conducted in dominant (D) and nondominant (ND) hands, using a dynamometer with EMG monitor to detect muscle activation. Results: ANCOVA analysis, controlling for maturational status, showed that judo athletes had higher values of maximal absolute (D = 33.6 ± 8.9 kgf vs 29.1 ± 9.0 kgf; ND = 33.8 ± 9.9 kgf vs 28.1 ± 8.1 kgf) and relative strength to body mass (D = 0.64 ± 0.12 kg/kgf vs 0.57 ± 0.13 kg/kgf; ND = 0.64 ± 0.16 kg/kgf vs 0.56 ± 0.14 kg/kgf). Moreover, judo athletes presented lower strength mean fatigue index (33.2 ± 6.9 % vs 37.9 ± 8.7 %) and muscle coactivation (48 ± 19.8 % vs 57.5 ± 22 %), only in the dominant hand, during the isometric strength-endurance handgrip test. During all repetitions of isometric endurance test there were no group or interaction between factors effects for absolute strength, relative strength and muscle coactivation. Conclusion: In summary, judo athletes present higher maximal absolute and relative strength and strength-endurance performance, concomitantly with decreased muscles co-activation (primary in dominant hand) during handgrip tests. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|