| Autor: |
Aitor Zabaleta-Korta, Eneko Fernández-Peña, Jon Torres-Unda, Maider Francés, Asier Zubillaga, Jordan Santos-Concejero |
| Rok vydání: |
2022 |
| DOI: |
10.21203/rs.3.rs-1530884/v1 |
| Popis: |
Purpose The aim of the present study was to analyse the role of exercises' resistance profile in regional hypertrophy. Methods 39 healthy women completed a 9-week resistance training program consisting of either 4 sets of 12 repetitions of inclined bicep curls (INC group) or preacher curls (PREA group) three times per week to muscle failure. Pre- and post-intervention muscle thickness was measured using B-mode ultrasound imaging with a linear-array transducer. Scan acquisition sites were determined by measuring the 50%, 60% and 70% of the distance between the posterior crest of acromion and the olecranon. Results No region of the INC group grew when comparing pre- to post-intervention. The 70% region of the PREA-group grew (Muscle thickness increased from 2.7 ± 0.43 to 2.94 ± 0.44). We found no growth differences between regions when analysing per group (p = 0.274), region (p = 0.571) or group*region (p = 0.367). Conclusion This study shows that regional hypertrophy is affected by the resistance profile of an exercise. Different regions of a muscle will grow in response to exercises that place the highest difficulty in specific points of the range of motion. Our results show that the distal region of the arm grows in response to exercises that place the highest amount of strain in the part of the range of motion in which the arm muscles are more elongated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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