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The effect of a cold beverage during an exercise session combining both strength and energy systems development training on core temperature and markers of performance.

Lafata D, Carlson-Phillips A, Sims ST, Russell EM - J Int Soc Sports Nutr (2012)

View Article: PubMed Central - HTML - PubMed

Affiliation: VP Nutrition & Research, Athletes' Performance & Core Performance, 2629 E Rose, Garden Lane, Phoenix, AZ, 85050, USA. acarlson@athletesperformance.com.

ABSTRACT

Background: Although studies have investigated the effects of hydration on performance measures, few studies have investigated how the temperature of the ingested liquid affects performance and core temperature during an exercise session. The hypothesis of the present study was that cold water would improve thermoregulation and performance as measured by bench repetitions to fatigue, broad jump for force and power and total time to exhaustion for cardiovascular fitness

Methods: Forty-five, physically fit, adult males (30.28 ± 5.4 yr, 1.77 ± 7.8 m, 83.46 ± 11.5 kg; 13.7 ± 4.8 %BF; 49.8 ± 6.3 ml/kg/min V02) completed two 60-minute exercise sessions. Subjects consumed either COLD (4°C) or room temperature (RT) water (22°C) in randomized order. Core temperature was measured every 15 minutes throughout each trial using a digestible thermometer. Three performance tests were performed upon completion of the exercise session: bench press to fatigue, standing broad jump, and bicycle time to exhaustion

Results: Although both groups significantly increased their core temperature (p<0.001) over the course of the exercise session and presented a significant decline in hydration status (p<0.001), participants in the COLD water trial had a significantly (p=0.024) smaller rise in core temperature (0.83°) over the duration of the trial in comparison to RT (1.13°). The participants in the COLD water trial were able to delay their increase in core body temperature for at least 30 minutes, whereas participants in the RT trial increased body temperature from baseline after 15 minutes. There was no significant difference between the COLD or the RT trials in broad jump and TTE performance tests. Bench press showed a small, albeit significant (p=0.046), decrease in performance when drinking COLD CONCLUSION: Drinking cold water can significantly mediate and delay the increase in core body temperature during an exercise session in a moderate climate with euhydrated subjects. The ingestion of COLD improved performance for 49% and 51% of the participants in the broad jump and TTE performance tests respectively, but did not reach statistical significance. Moreover, although minimal, subjects experienced a decrease in performance on the bench press during the COLD.

No MeSH data available.


Comparison of core temperature increase over the duration of the trial.ap<0.05.
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Figure 1: Comparison of core temperature increase over the duration of the trial.ap<0.05.

Mentions: There was a significant effect for time such that body temperature increased in both groups over the course of the 60-minute exercise session (p<0.001). There were no significant interactions between condition and time (p=0.380) such that subjects behaved similarly to the effect of exercise over time, regardless of water temperature condition. The post-hoc analysis of changes in body temperature over time indicates that, when drinking RT water, a significant increase in body temperature was observed after 15 minutes. In the COLD condition, the increase in body temperature was delayed until 45 minutes. There were no significant interactions between condition and time (p=0.141) such that subjects behaved similarly to the effect of exercise over time, regardless of water temperature condition. Figure 1 shows the change in core temperature from baseline at each 15-minute time point.


The effect of a cold beverage during an exercise session combining both strength and energy systems development training on core temperature and markers of performance.

Lafata D, Carlson-Phillips A, Sims ST, Russell EM - J Int Soc Sports Nutr (2012)

Comparison of core temperature increase over the duration of the trial.ap<0.05.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472188&req=5

Figure 1: Comparison of core temperature increase over the duration of the trial.ap<0.05.
Mentions: There was a significant effect for time such that body temperature increased in both groups over the course of the 60-minute exercise session (p<0.001). There were no significant interactions between condition and time (p=0.380) such that subjects behaved similarly to the effect of exercise over time, regardless of water temperature condition. The post-hoc analysis of changes in body temperature over time indicates that, when drinking RT water, a significant increase in body temperature was observed after 15 minutes. In the COLD condition, the increase in body temperature was delayed until 45 minutes. There were no significant interactions between condition and time (p=0.141) such that subjects behaved similarly to the effect of exercise over time, regardless of water temperature condition. Figure 1 shows the change in core temperature from baseline at each 15-minute time point.

View Article: PubMed Central - HTML - PubMed

Affiliation: VP Nutrition & Research, Athletes' Performance & Core Performance, 2629 E Rose, Garden Lane, Phoenix, AZ, 85050, USA. acarlson@athletesperformance.com.

ABSTRACT

Background: Although studies have investigated the effects of hydration on performance measures, few studies have investigated how the temperature of the ingested liquid affects performance and core temperature during an exercise session. The hypothesis of the present study was that cold water would improve thermoregulation and performance as measured by bench repetitions to fatigue, broad jump for force and power and total time to exhaustion for cardiovascular fitness

Methods: Forty-five, physically fit, adult males (30.28 ± 5.4 yr, 1.77 ± 7.8 m, 83.46 ± 11.5 kg; 13.7 ± 4.8 %BF; 49.8 ± 6.3 ml/kg/min V02) completed two 60-minute exercise sessions. Subjects consumed either COLD (4°C) or room temperature (RT) water (22°C) in randomized order. Core temperature was measured every 15 minutes throughout each trial using a digestible thermometer. Three performance tests were performed upon completion of the exercise session: bench press to fatigue, standing broad jump, and bicycle time to exhaustion

Results: Although both groups significantly increased their core temperature (p<0.001) over the course of the exercise session and presented a significant decline in hydration status (p<0.001), participants in the COLD water trial had a significantly (p=0.024) smaller rise in core temperature (0.83°) over the duration of the trial in comparison to RT (1.13°). The participants in the COLD water trial were able to delay their increase in core body temperature for at least 30 minutes, whereas participants in the RT trial increased body temperature from baseline after 15 minutes. There was no significant difference between the COLD or the RT trials in broad jump and TTE performance tests. Bench press showed a small, albeit significant (p=0.046), decrease in performance when drinking COLD CONCLUSION: Drinking cold water can significantly mediate and delay the increase in core body temperature during an exercise session in a moderate climate with euhydrated subjects. The ingestion of COLD improved performance for 49% and 51% of the participants in the broad jump and TTE performance tests respectively, but did not reach statistical significance. Moreover, although minimal, subjects experienced a decrease in performance on the bench press during the COLD.

No MeSH data available.