Snippit is made possible by listeners like you.

Please help support the podcast:

► https://www.patreon.com/snippitscience 

 

 

We hope you enjoyed our first podcast. As we mentioned in the first episode, this podcast has been the culmination of quite a long time talking about this concept. To see this come to fruition gives us both a big buzz.  As with all podcasts, we realise that the content is important but also how it is packaged together.  We have some cool ideas to keep this concept fresh so stay tuned.

This week’s podcast delves into the concept of passive heat maintenance (PHM) in elite swimmers.  The concept of PHM around warm-up and competitive performance is simple:

One of the benefits of warm-up is an increase in muscle temperature

From cessation of warm-up, we start to lose muscle temperature

For every 1 degree C in muscle temperature we lose (or gain), there is a 4% loss (or gain) in power output

Within 20 min, you can lose 45% of heat gained by warm-up, and by 45 min, any gain in muscle temperature has been completely lost

You can maintain muscle temperature passively by using specialised garments that have heating panels or by using simple heat reflective survival blankets

If you want a more detailed discussion of PHM, visit Chris's personal blog: https://chrisgaviglio.com/blogs/news/improve-performance-by-4-do-this-one-simple-thing

 

  

Today's episode is:

J Sci Med Sport. 2016 Apr; 19(4):354-8

https://www.sciencedirect.com/science/article/pii/S1440244015000948

Epub 2015 Apr 30

 

Heated jackets and dryland-based activation exercises used as additional warm-ups during transition enhance sprint swimming performance.

McGowan CJ, Thompson KG, Pyne DB, Raglin JS, Rattray B.

 

Abstract

 

OBJECTIVES:

The lengthy competition transition phases commonly experienced by competitive swimmers may mitigate the benefits of the pool warm-up. To combat this, we examined the impact of additional passive and active warm-up strategies on sprint swimming performance.

 

DESIGN:

Counterbalanced, repeated-measures cross-over study.

 

METHODS:

Sixteen junior competitive swimmers completed a standardised pool warm-up followed by a 30min transition and 100m freestyle time-trial. Swimmers completed four different warm-up strategies during transition: remained seated wearing a conventional tracksuit top and pants (Control), wore an insulated top with integrated heating elements (Passive), performed a 5min dryland-based exercise circuit (Dryland), or a combination of Passive and Dryland (Combo). Swimming time-trial performance, core and skin temperature and perceptual variables were monitored. Time variables were normalised relative to Control.

 

RESULTS:

Both Combo (-1.05±0.26%; mean±90% confidence limits, p=0.00) and Dryland (-0.68±0.34%; p=0.02) yielded faster overall time-trial performances, with start times also faster for Combo (-0.37±0.07%; p=0.00) compared to Control. Core temperature declined less during transition with Combo (-0.13±0.25°C; p=0.01) and possibly with Dryland (-0.24±0.13°C; p=0.09) compared to Control (-0.64±0.16°C), with a smaller reduction in core temperature related to better time-trial performance (R(2)=0.91; p=0.04).

 

CONCLUSIONS:

Dryland-based exercise circuits completed alone and in combination with the application of heated tracksuit jackets during transition can significantly improve sprint swimming performance. Attenuation in the decline of core temperature and a reduction in start time appear as likely mechanisms.

 

Copyright © 2015 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.

 

KEYWORDS:

Core temperature; Passive heating; Swim performance

 

PMID: 25987491

DOI: 10.1016/j.jsams.2015.04.012 

 

 

Please subscribe to Snippit:

 ► http://snippitscience.com

 ► https://snippitscience.podbean.com

 ► https://soundcloud.com/snippitscience

 ► http://bit.do/snippititunes

 ► http://bit.do/snippitspotify

 ► http://bit.do/snippityoutube

 ► http://bit.do/snippitnewsletter

 ► http://feed.podbean.com/snippitscience/feed.xml RSS

 

Explore our other content:

 ► https://bfrradio.podbean.com

 ► https://chrisgaviglio.com

 ► https://twitter.com/ChrisGaviglio

 ► https://twitter.com/Jared_CS

 

Follow SnippitScience on social media:

 ► https://twitter.com/snippitscience

 ► https://www.facebook.com/snippitscience

 ► https://www.instagram.com/snippitscience

 ► https://www.pinterest.com/snippitscience

 ► https://snippitscience.tumblr.com

 ► https://www.reddit.com/r/snippitscience

 ► https://snippitscience.wordpress.com

 

 

Please like, share, and comment below, subscribe at the top of the page, and help support the podcast:

► https://www.patreon.com/snippitscience 

 

Thank you for your support!