التفاصيل البيبلوغرافية
| العنوان: |
Elbow Joint Angles in Elbow Flexor Unilateral Resistance Exercise Training Determine Its Effects on Muscle Strength and Thickness of Trained and Non-trained Arms |
| المؤلفون: |
Shigeru Sato, Riku Yoshida, Ryosuke Kiyono, Kaoru Yahata, Koki Yasaka, João Pedro Nunes, Kazunori Nosaka, Masatoshi Nakamura |
| المصدر: |
Frontiers in Physiology, Vol 12 (2021) |
| بيانات النشر: |
Frontiers Media S.A., 2021. |
| سنة النشر: |
2021 |
| المجموعة: |
LCC:Physiology |
| مصطلحات موضوعية: |
maximal voluntary contraction torque, isometric, concentric, eccentric, cross-education effect, range of motion, Physiology, QP1-981 |
| الوصف: |
The present study compared two unilateral arm curl resistance exercise protocols with a different starting and finishing elbow joint angle in the same ROM for changes in elbow flexors strength and muscle thickness of the trained and non-trained arms. Thirty-two non-resistance trained young adults were randomly assigned to one of the three groups: extended joint training (0°–50°; EXT, n = 12); flexed joint training (80°–130°; FLE, n = 12); and non-training control (n = 8). The exercise training was performed by the dominant arms twice a week for 5 weeks with gradual increases in the training volume over 10 training sessions, and the non-dominant (non-trained) arms were investigated for the cross-education effect. Maximal voluntary contraction torque of isometric (MVC-ISO), concentric (MVC-CON), and eccentric contractions (MVC-ECC), and thickness (MT) of biceps brachii and brachialis of the trained and non-trained arms were assessed at baseline and 4–8 days after the last training session. The control group did not show significant changes in any variables. Significant (P < 0.05) increases in MVC-ISO torque (16.2 ± 12.6%), MVC-CON torque (21.1 ± 24.4%), and MVC-ECC torque (19.6 ± 17.5%) of the trained arm were observed for the EXT group only. The magnitude of the increase in MT of the trained arm was greater (P < 0.05) for EXT (8.9 ± 3.9%) than FLE (3.4 ± 2.7%). The cross-education effect was evident for MVC-ISO (15.9 ± 14.8%) and MVC-CON (16.7 ± 20.0%) torque of the EXT group only. These results suggest that resistance training at the extended elbow joint induces greater muscle adaptations and cross-education effects than that at flexed elbow joint. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
1664-042X |
| Relation: |
https://www.frontiersin.org/articles/10.3389/fphys.2021.734509/full; https://doaj.org/toc/1664-042X |
| DOI: |
10.3389/fphys.2021.734509 |
| URL الوصول: |
https://doaj.org/article/de4a73e412514feea426ba670dee8d2e |
| رقم الانضمام: |
edsdoj.4a73e412514feea426ba670dee8d2e |
| قاعدة البيانات: |
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