Comfort, P 
ORCID: https://orcid.org/0000-0002-1131-8626, Thomas, C, Dos'Santos, T, Suchomel, TJ, Jones, PA ORCID: https://orcid.org/0000-0002-3295-7670 and McMahon, JJ
2018,
'Changes in dynamic strength index in response to strength training'
, Sports, 6 (4)
, p. 176.
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Abstract
The primary aim of this investigation was to determine the effects of a four-week period of in-season strength training on the dynamic strength index (DSI). Pre and post a four-week period of strength-based training, twenty-four collegiate athletes (age = 19.9 ± 1.3 years; height = 1.70 ± 0.11 m; weight 68.1 ± 11.8 kg) performed three isometric mid-thigh pulls and countermovement jumps to permit the calculation of DSI. T-tests and Cohen’s effect sizes revealed a significant but small (p = 0.009, d = 0.50) decrease in DSI post-training (0.71 ± 0.13 N·N−1) compared to pre-training (0.65 ± 0.11 N·N−1); however, when divided into high and low DSI groups, differential responses were clear. The low DSI group exhibited no significant or meaningful (p = 1.000, d = 0.00) change in DSI pre to post-training (0.56 ± 0.05 N·N−1, 0.56 ± 0.09 N·N−1, respectively), whereas the high DSI group demonstrated a significant and large decrease (p = 0.034, d = 1.29) in DSI pre to post-training (0.85 ± 0.05 N·N−1, 0.74 ± 0.11 N·N−1, respectively), resulting in a significant and moderate difference (p = 0.034, d = 1.29) in the change in DSI between groups. These results demonstrate that DSI decreases in response to strength training, as expected, due to an increase in isometric mid-thigh pull peak force, with minimal change in dynamic (countermovement jump) peak force
| Item Type: | Article |
|---|---|
| Schools: | Schools > School of Health and Society > Centre for Health Sciences Research |
| Journal or Publication Title: | Sports |
| Publisher: | MDPI |
| ISSN: | 2075-4663 |
| Related URLs: | |
| Depositing User: | USIR Admin |
| Date Deposited: | 19 Dec 2018 13:32 |
| Last Modified: | 21 Nov 2019 14:45 |
| URI: | http://usir.salford.ac.uk/id/eprint/49564 |
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