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Latest Research
Research Details
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| Research Title: |
Effects of active warm up on thermoregulation and intermittent-sprint performance in hot conditions. |
| Type of Research: |
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| Category: |
Environment
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| Keywords: |
warm up, heat, Intermittent exercise, Core temperature, performance, team sport
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| Author(s): |
David Bishop, Neil Maxwell |
| Author(s) Bio Box: |
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| Release Date: |
25 June 2009 |
| Research Summary/Text: |
Warm up for participation in sport or athletic events is widely accepted practice to improve performance in short-term sprint, due to the effects of increased body temperature. Eight male field hockey athletes participated in a study investigating whether active warm-up in hot conditions would increase thermoregulatory strain associated with exercise, leading to decreased performance in repeated (inadequate recovery between) and intermittent (adequate recovery between) sprints. Subjects undertook three preliminary sessions and three experimental trials over a 4-week period. The experimental trial entailed subjects undertaking an intermittent sprint test (IST) in a hot environment following one of three warm up conditions (0 mins, 10 mins and 20 mins). The IST mimicked the average sprint profile of one half of a typical team-sport game, including 36 minutes of intermittent-sprint exercise. Thermoregulatory and metabolic responses (using measures of urine specific gravity, rectal temperature, capillary blood sampling and analysis, and calculations of the physiological strain index) and performance (using measures of work and power outputs) were measured.
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| Research Objectives: |
The aim of the research was to determine the effect of active warm-up on team-sport performance in a hot environment (35 degrees Celsius) by simulating the metabolic and thermoregulatory responses of trained team-sport athletes.
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| Research Outcomes: |
Longer active warm up (of 20 minutes duration) resulted in a greater increase in core temperature and was associated with a decrease in short-term repeated sprint ability in hot conditions. While prolonged intermittent sprint performance in the heat was not affected by any of the warm up conditions, it did not improve either.
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| Research Implications: |
In hot conditions, excessive warm up prior to participation in typical team-sport activity is not likely to confer performance benefits and may increase the risk of heat illness due to elevated core temperature.
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| Availability of Full Research Paper: |
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