{"id":495059,"date":"2022-01-08T04:00:18","date_gmt":"2022-01-08T11:00:18","guid":{"rendered":"https:\/\/www.swimmingworldmagazine.com\/news\/?p=495059"},"modified":"2022-01-07T15:17:24","modified_gmt":"2022-01-07T22:17:24","slug":"swimming-world-january-2022-presents-swimming-technique-concepts-maximizing-swimming-velocity-part-7-optimal-stroke-cycle-for-butterfly-and-freestyle","status":"publish","type":"post","link":"https:\/\/www.swimmingworldmagazine.com\/news\/swimming-world-january-2022-presents-swimming-technique-concepts-maximizing-swimming-velocity-part-7-optimal-stroke-cycle-for-butterfly-and-freestyle\/","title":{"rendered":"Swimming World January 2022 Presents – Swimming Technique Concepts – Maximizing Swimming Velocity Part 7: Optimal Stroke Cycle For Butterfly and Freestyle"},"content":{"rendered":"

The latest issue of Swimming World Magazine<\/em><\/span>
\nis now available for download in the<\/span> Swimming World Vault<\/span><\/strong><\/a>!<\/p>\n

Non-Subscribers Can Download This Issue Here<\/span><\/a><\/p>\n

 <\/p>\n

Maximizing Swimming Velocity Part 7: Optimal Stroke Cycle For Butterfly and Freestyle<\/span><\/h1>\n

By Rod Havriluk<\/span><\/p>\n

Previous articles in this series presented the stroke cycle component times for the arms for elite male sprinters. The average propulsive phase times could be slightly longer because swimmers do not always take full advantage of the time that they could generate propulsion. The average non-propulsive phase times could be shorter because swimmers waste considerable time.<\/p>\n

A swimmer who takes full advantage of the propulsive phase and eliminates the wasted time on the non-propulsive phase can optimize stroke cycle time. This article presents optimal times for both the propulsive and non-propulsive phases of butterfly and freestyle with corresponding predicted performance improvements.<\/p>\n

PROPULSIVE AND NON-PROPULSIVE PHASES<\/strong><\/span>
\nIn butterfly and freestyle, the propulsive phase includes both the pull and push phases. The non-propulsive phase combines the recovery and entry phases. The striped bars in the graph in Fig.1 show the average propulsive and non-propulsive phase times at sprint pace for elite male swimmers from two studies (Chollet, Seifert, Boulesteix, Carter, 2006; Seifert, Chollet, & Bardy, 2004).<\/p>\n

AVERAGE PROPULSIVE PHASE TIME<\/span>
\n<\/strong>The butterfly and freestyle arm positions are similar at the beginning of the propulsive phase as shown in Figs. 2 and 3. The average propulsive phase is longer than one-half second for both strokes. However, swimmers often prematurely lift the elbows to begin the exit phase\u2014a technique limitation that is almost universal. A propulsive phase of 6-tenths of a second is consistent with gaining maximum benefit.<\/p>\n

\u00a0<\/span><\/p>\n

To read more about the optimal stroke cycle for butterfly and freestyle complete with illustrations, <\/span><\/a>
\n<\/strong>Click here to download the full January issue of Swimming World Magazine, available now!<\/span><\/a><\/strong><\/p>\n

 <\/p>\n

Dr. Rod Havriluk is a sport scientist and consultant who specializes in swimming technique instruction and analysis. His newest ebooks in the \u201cApproaching Perfect Swimming\u201d series are \u201cOptimal Stroke Technique\u201d and \u201cSwimming Without Pain,\u201d and are available at swimmingtechnology.com<\/a>. Contact Rod through info@swimmingtechnology.com<\/a>. All scientific documentation relating to this article, including scientific principles, studies and research papers, can be provided upon demand.<\/em><\/p>\n

 <\/p>\n

\"Swimming<\/a>[Photo Courtesy: Robert Hanashiro \/ USA Today Sports]<\/p>\n

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FEATURES<\/p>\n

012<\/span> THE TOP 5 STORIES OF 2021<\/strong><\/span>
\nby David Rieder<\/strong>
\nWhile the pandemic and its massive effects on the sport were the lone top story of 2020, the action in the pool returned to center-stage in 2021. Unsurprisingly, the focus of the year\u2019s top stories centers on Tokyo, where the Olympics produced some amazing performances and historic results.<\/p>\n

016<\/span> 2021 ATHLETES OF THE YEAR<\/strong><\/span>
\nby Dan D\u2019Addona and Matthew De George<\/strong><\/p>\n