- Title
- Physiological responses to cold water immersion following cycling in the heat
- Creator
- Halson, Shona; Quod, Marc; Martin, David; Gardner, Andrew; Ebert, Tammie; Laursen, Paul
- Date
- 2008
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/59365
- Identifier
- vital:384
- Identifier
- ISSN:1555-0265
- Abstract
- Cold water immersion (CWI) has become a popular means of enhancing recovery from various forms of exercise. However, there is minimal scientific information on the physiological effects of CWI following cycling in the heat. Purpose: To examine the safety and acute thermoregulatory, cardiovascular, metabolic, endocrine, and inflammatory responses to CWI following cycling in the heat. Methods: Eleven male endurance trained cyclists completed two simulated ?40-min time trials at 34.3±1.1°C. AU subjects completed both a CWI trial (11.5°C for 60 s repeated three times) and a control condition. (CONT; passive recovery in 24.2±1.8°C) in a randomized cross-over design. Capillary blood samples were assayed for lactate, glucose, pH, and blood, gases. Venous blood samples were assayed for catecholamines, Cortisol, testosterone, creatine kinase, C-reactive protein, IL-6, and IGF-1 on 7 of the 11 subjects. Heart rate (HR), rectal (Tre), and skin temperatures (Tsk) were measured throughout recovery. Results: CWI elicited a significantly lower HR (CWI: ?11.6±9 bpm vs. CONT: ?106±4 bpm; P = .02), Tre (CWI: ?1.99±0. 50°C vs. CONT: ?1.49±0.50°C; P = .01) and Tsk. However, all other measures were not significantly different between conditions. All participants subjectively reported enhanced sensations of recovery following CWI. Conclusion: CWI did not result in hypothermia and can be considered safe following high intensity cycling in the heat, using the above protocol. CWI significantly reduced heart rate and core temperature; however, all other metabolic and endocrine markers were not affected by CWI. © 2008 Human Kinetics, Inc.; C1
- Publisher
- Human Kinetics
- Relation
- International Journal of Sports Physiology and Performance Vol. 3, no. 3 (2008), p. 331-346
- Rights
- Copyright Human Kinetics
- Rights
- This metadata is freely available under a CCO license
- Subject
- Core temperature; Cryotherapy; Recovery; Thermoregulation
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