Effect of post-exercise hydrotherapy water temperature on subsequent exhaustive running performance in normothermic conditions

Purpose

This study examined the effect of CWI (15min,temperatures of 8◦C and 15◦C) as a recovery strategy applied between two exhaustive submaximal performance in normothermic ambient conditions (∼22 ◦ C).

Design:

9 endurance-trained men completed two submaximal exhaustive running bouts on three separate occasions. The running bouts (Ex1 and Ex2) were separated by 15 min of

  • unimmersed seated rest (CON)
  • hip-level CWI at 8 ◦ C (CWI-8)
  • hip-level CWI at 15 ◦ C (CWI-15).

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temperature ,blood lactate and heart rate were recorded throughout, and VO2, running economy and exercise times were recorded during the running sessions.

Results:

Running time to failure (min) during Ex2 was significantly longer following CWI-8 than CON but not different between CWI-15 and CON or CWI-8 and CWI-15).

Time to failure (min) during Ex1 was not different among the three trials. However, time to failure during Ex2 was significantly longer in CWI-8 than CON and tended to be also longer in CWI-15 than CON while it was similar between CWI-8 and CWI-15.

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This outcome was supported by qualitative analyses showing a ‘likely’ beneficial effect of CWI-8 and CWI-15 compared with CON and a moderate ES. Skærmbillede 2015-12-11 kl. 13.53.50

Intestinal temperature responses are shown no differences in temperature among the three trials throughout Ex1 and the recovery period. However, intestinal temperature was significantly lower for CWI-8 and CWI-15 compared with CON for all time points apart from the point of failure during Ex2.

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Heart rate responses were significantly lower for most of Ex2 during CWI-8 and CWI-15 compared with CON (moderate ES) but they were similar at min 15 and at failure for the three conditions. Blood lactate was significantly higher in CWI-8 than in both CON and CWI-15 at the beginning of Ex2, but it was higher in CON compared with CWI-15 at the point of failure.

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Conclusions:

These data indicate that a 15 min period of cold water immersion applied between repeated exhaustive exercise bouts significantly reduces intestinal temperature and enhances post-immersion running performance in normothermic conditions.

 

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