Shoulder Tensiomyography and Isometric Strength in Swimmers Before and After a Fatiguing Protocol.
| Autor: | Buoite Stella, Alex, Cargnel, Andrea, Raffini, Alessandra, Mazzari, Laura, Martini, Miriam, Ajčević, Miloš, Accardo, Agostino, Deodato, Manuela, Murena, Luigi |
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| Předmět: |
SHOULDER physiology
MUSCLE fatigue MEDICAL protocols EXERCISE physiology CROSS-sectional method BIOMECHANICS LATISSIMUS dorsi (Muscles) PEARSON correlation (Statistics) SKELETAL muscle DATA analysis ISOMETRIC exercise HIGH-intensity interval training PECTORALIS muscle NEUROPHYSIOLOGY DIAGNOSIS DESCRIPTIVE statistics NEUROMUSCULAR system MUSCLE strength SWIMMING ANALYSIS of variance STATISTICS ATHLETIC ability EXERCISE tests CONFIDENCE intervals DATA analysis software MUSCLES MUSCLE contraction RANGE of motion of joints ADOLESCENCE |
| Zdroj: | Journal of Athletic Training (Allen Press); Jul2024, Vol. 59 Issue 7, p738-744, 7p |
| Abstrakt: | Shoulder muscles are active during front-crawl swimming to provide propulsion and stabilize the glenohumeral and scapulothoracic joints. Researchers have proposed that fatigue might contribute to altered activation of these muscles and represent a risk factor for injuries. Tensiomyography (TMG) might function as a noninvasive tool to detect changes in contractile measures of the skeletal muscles due to exercise-induced neuromuscular fatigue, though it has not yet been used in the shoulder muscles of swimmers. To assess the effects of a fatiguing swimming protocol on shoulder muscle TMG measures and isometric strength in competitive swimmers. Cross-sectional study. Swimming pool facility. A total of 14 young front-crawl competitive swimmers (11 males and 3 females; age = 21 ± 3 years [range, 17–26 years], height = 1.78 ± 0.06 m, mass = 73.1 ± 9.2 kg). Participants completed TMG and isometric strength assessments before and after 30-minute, high-intensity swim training. The TMG assessment was performed on 7 muscles of the shoulder according to front-crawl biomechanics and the applicability of the technique to obtain data, such as time to contraction and muscle-belly radial displacement. Isometric strength was assessed using a digital handheld dynamometer during shoulder flexion, extension, external rotation, and internal rotation. Fatigue induced a smaller radial displacement, mostly observable in latissimus dorsi (−1.0 mm; 95% CI = −1.7, −0.3 mm; P =.007) and pectoralis major muscles (−1.4 mm; 95% CI = −2.4, −0.4 mm; P =.007). Only shoulder extension showed an isometric strength reduction after the fatiguing protocol (−0.03 N/kg; 95% CI = −0.05, −0.01 N/kg; F |
| Databáze: | Complementary Index |
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