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- Title
Reliability and Validity of a Novel Trunk-Strength Assessment for High-Performance Sprint Flat-Water Kayakers.
- Authors
Steeves, Darren; Thornley, Leo J.; Goreham, Joshua A.; Jordan, Matthew J.; Landry, Scott C.; Fowles, Jonathon R.
- Abstract
Purpose: To determine the reliability and validity of a novel trunk maximal isometric force assessment involving 7 different tasks with 200-m times for elite sprint flat-water kayakers. Methods: Ten elite sprint flat-water kayakers performed a series of maximal isometric voluntary contractions (MVCs) on 2 separate days to assess reliability. MVC force was assessed as the participants sat on a modified kayak ergometer and applied their maximal isometric force to a uniaxial load cell during 7 different tasks. The 7 tasks of interest were a seated trunk-forward flexion, bilateral (left and right) rotational pulls, bilateral rotational pushes, and a sport-specific bilateral kayak-stroke simulation. Twenty elite flat-water kayak athletes (10 male and 10 female) participated in the validity portion by completing the series of tasks in conjunction with a 200-m race. Results: MVC force values ranged from 84 to 800 N across all participants and all tasks. The average coefficient of variation of the 7 tasks ranged from 2.4% to 7.7%. Regression analysis showed Pearson correlations ranging from −.84 to −.22 for both absolute and relative values with 200-m performance times. Conclusions: MVC force measured in each task was considered reliable as a small degree of variance between trials was found. The summation of the 7 trunk scores showed very strong correlations with on-water performance, indicating that this assessment is valid for elite sprint kayakers.
- Subjects
ABDOMINAL exercises; ISOMETRIC exercise; ATHLETIC ability; STATISTICAL correlation; RANGE of motion of joints; RESEARCH methodology; MUSCLE contraction; MUSCLE strength; REGRESSION analysis; RESEARCH evaluation; ROWING; BACK exercises; TORSO; ELITE athletes; ERGOMETRY; RESEARCH methodology evaluation
- Publication
International Journal of Sports Physiology & Performance, 2019, Vol 14, Issue 4, p486
- ISSN
1555-0265
- Publication type
Article
- DOI
10.1123/ijspp.2018-0428