Influence of Muscle Hypertrophy on the Moment Arm of the Triceps Brachii Muscle
| Autor: | Yasuo Kawakami, Naokazu Miyamoto, Koichiro Murata, Tetsuo Fukunaga, Taku Wakahara, Hiroaki Kanehisa, Norihide Sugisaki |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Male
Adolescent Olecranon Elbow Biophysics Sensitivity and Specificity Muscle hypertrophy Elbow Joint medicine Humans Torque Orthopedics and Sports Medicine Olecranon Process Range of Motion Articular Muscle Skeletal medicine.diagnostic_test business.industry Rehabilitation Resistance training Reproducibility of Results Triceps brachii muscle Resistance Training Magnetic resonance imaging Hypertrophy Organ Size Anatomy Treatment Outcome medicine.anatomical_structure Range of motion business |
| Zdroj: | Journal of Applied Biomechanics. 31:111-116 |
| ISSN: | 1543-2688 1065-8483 |
| DOI: | 10.1123/jab.2014-0126 |
| Popis: | Although the moment arm of the triceps brachii muscle has been shown to be associated with the muscle’s anatomical crosssectional area, whether training-induced muscle hypertrophy alters the moment arm of the muscle remains unexplored. Therefore, the current study aimed to examine this. Eleven men underwent a 12-week resistance training program for the triceps brachii muscle. The maximum muscle anatomical cross-sectional area (ACSAmax), the moment arm of the triceps brachii muscle, and the anterior-posterior dimension of the olecranon were measured using a magnetic resonance imaging system before and after intervention. The ACSAmax (33.6 ± 11.9%, P < .001) and moment arm (5.5 ± 4.0%, P = .001) significantly increased after training, whereas the anterior-posterior dimension of the olecranon did not change (P > .05). The change in moment arm was smaller than that expected from the relationship between the ACSAmax and the moment arm before the intervention. The present results indicate that training-induced triceps brachii muscle hypertrophy could increase the muscle moment arm, but its impact can be small or negligible. |
| Databáze: | OpenAIRE |
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