| Autor: |
Sullivan K; Department of Kinesiology, California State University, Northridge, CA, USA., Ferreira PR; Department of Physical Therapy, California State University, Northridge, CA, USA., Martinez VGF; Department of Kinesiology, California State University, Northridge, CA, USA., Marchetti PH; Department of Kinesiology, California State University, Northridge, CA, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
International journal of exercise science [Int J Exerc Sci] 2023 May 01; Vol. 16 (6), pp. 538-549. Date of Electronic Publication: 2023 May 01 (Print Publication: 2023). |
| Abstrakt: |
The primary purpose of this study was to evaluate acute dose response of different intensities with total volume equalized during the abdominal crunch exercise on muscle thickness, echo-intensity, peak force, time under tension, total load lifted, and perception of effort in recreationally-trained participants. Fifteen resistance-trained participants (23 ± 3 years) performed the abdominal crunch exercise in one of two different resistance training (RT) protocols in a randomized order: RT 4×10RM (4 sets of 10RM / 1-min rest) or RT 1×40RM (1 set of 40RM). Muscle thickness (MT), echo-intensity (EI), peak force (PF), time under tension (TUT), total load lifted (TLL), and session rating of perceived exertion (sRPE) were measured pre-test and post-test (0-min and 15-min). Two-way repeated-measures ANOVAs (2 × 3) were used to test differences between RT protocols (RT 4×10RM and RT 1×40RM ) and time (pre-test, post-0, and post-15) for MT, EI, and PF. Paired t-test was used to compare RT protocols for sRPE, TLL, and TUT. For MT, there were significant differences for RT 4×10RM between pre-x post-0 ( p = 0.011), pre-x post-15 ( p < 0.001), and post-0 × post-15 ( p = 0.02); and for RT 1×40RM between pre-x post-0 ( p < 0.001) and pre-x post-15 ( p = 0.003). For EI, there was a significant difference for RT 4×10RM between pre-x post-0 ( p = 0.002). For sRPE, there was no significant difference between RT protocols. For TLL and TUT, there were significant differences between RT protocols ( p < 0.05). In conclusion, both RT protocols (RT 4×10RM and RT 1×40RM ) induced similar increases in MT but not for EI. TLL and TUT were higher for RT 4×10RM . PF and sRPE were similar between RT protocols. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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