Abstract：
:The aim of this study was to determine whether a relationship exists between stroke parameters and critical swimming speed (which is defined as the speed that can theoretically be maintained without exhaustion). Stroke parameters (stroke rate and length) and velocity were recorded for each 25-m length during a controlled sprint interval training set in which participants swam one of the four competitive strokes at a range of intensities below, at, and above critical speed. Eleven participants (8 females, 3 males; age 17.9 +/- 0.9 years) completed a progressive (descending) set of 8 x 100 m repetitions in a 25-m pool according to target times that ranged in intensity from 65% to 100% of the swimmer's best time (the intensity for each repetition increased by 5% throughout the set). The data showed that participants reached critical speed on the fourth repetition and that substantial and unpredictable changes in stroke parameters occurred once critical speed had been reached. Specifically, post-critical speed stroke rate and stroke length were significantly (P < 0.01) greater and less, respectively, than the pre-critical speed values, and these changes occurred in an abrupt and non-linear manner. Overall, the findings suggest that critical speed represents a transition point between two different sets of stroke parameter relationships--one for low-intensity aerobic swimming and one for high-intensity anaerobic swimming.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Barden JM,Kell RTdoi
10.1080/02640410802475205subject
Has Abstractpub_date
2009-02-01 00:00:00pages
227-35issue
3eissn
0264-0414issn
1466-447Xpii
907909947journal_volume
27pub_type
杂志文章abstract：:This study examined if short-duration record power outputs can be predicted with the Anaerobic Power Reserve (APR) model in professional cyclists using a field-based approach. Additionally, we evaluated if modified model parameters could improve predictive ability of the model. Twelve professional cyclists (V̇O2max 75...
journal_title：Journal of sports sciences
pub_type： 杂志文章
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abstract：:In this study, we measured the vertical and horizontal take-off forces, plantar pressures and activation patterns of four muscles (vastus lateralis, gluteus maximus, tibialis anterior, gastrocnemius) in 10 ski jumpers in simulated laboratory conditions when wearing either training shoes or ski jumping boots. We found ...
journal_title：Journal of sports sciences
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abstract：:The use of high-resolution physical activity intensity spectra obtained from accelerometry can improve knowledge of associations with health and development beyond the use of traditional summary measures of intensity. The aim of the present study was to compare three different approaches for determining associations f...
journal_title：Journal of sports sciences
pub_type： 杂志文章
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journal_title：Journal of sports sciences
pub_type： 杂志文章
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abstract：:The aim of this study was to establish the effectiveness of a resistance training programme, designed to improve vertical jumping ability, on the grab, swing and rear-weighted track starts in swimming. Twenty-three female non-competitive swimmers participated (age 19.9 +/- 2.4 years; mean +/- s). The diving techniques...
journal_title：Journal of sports sciences
pub_type： 临床试验,杂志文章,随机对照试验
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
pub_type： 杂志文章,meta分析
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journal_title：Journal of sports sciences
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pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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