Climate and the Exercising Child

Bar‐Or, Oded

doi:10.1007/978-1-4612-5593-2_9

Cited by 9 publications

(2 citation statements)

References 60 publications

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“…Meyer et al (1992) demonstrated that adults have elevated sodium (Na) and chloride (Cl) concentrations in sweat. It has also been shown that body core temperature increases at a higher rate for any given level of hypohydration in children than in adults (Bar-Or et al 1980). Despite the multitude of differences in the physiological responses of the child, the critical question is whether these characteristics will limit performance in children.…”

Section: Fluid Intake and Compositionmentioning

confidence: 99%

The Young Athlete

Unnithan¹,

Baxter‐Jones²

2000

Nutrition in Sport

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Section: Fluid Intake and Compositionmentioning

confidence: 99%

The Young Athlete

Unnithan¹,

Baxter‐Jones²

2000

Nutrition in Sport

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“…Available evidence indicates the increased susceptibility of children and older adults to dehydration and the resulting complications. In children, the more inefficient thermoregulation results in an earlier and more pronounced impairment of physical performance (Bar-Or, 1983). In seniors, cognitive performance is especially prone to acute dehydration (Wilson & Morley, pp.…”

mentioning

confidence: 99%

Summary and Outlook

2003

Eur J Clin Nutr

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Temperature-related overestimation of energy expenditure, based on heart-rate monitoring in obese boys

Kriemler

Hebestreit

Bar‐Or

2002

European Journal of Applied Physiology

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An equation has been developed to reduce the error in predicting energy expenditure (EE) from heart rate (HR) monitoring, by correcting for climate-related HR increases. To evaluate the effects of such a correction in a "real life" situation, a group of 9- to 14-year-old obese boys [mean (SD) 36.6 (3.3)% body fat; n=14] was monitored for 6 days during the summertime. An activity interview was taken daily. During times of outdoor activities, measurements of HR were corrected for the influence of ambient temperature ( T) using the aforementioned equation. Time spent outdoors was 196.7 (21.1) min/day at a T of 17-34 degrees C. Temperature correction reduced the time spent at HR>140 beats/min and >160 beats/min by 20-25% during outdoor activity. Estimated outdoor EE corrected for the influence of temperature was 2.46 (2.37) MJ; the uncorrected value was 2.68 (2.45) MJ. The respective values for the waking hours and over 24 h were 7.34 (2.77) MJ versus 7.55 (2.81) MJ and 10.83 (2.72) MJ versus 11.05 (2.77) MJ, respectively. The excessive HR measured in a warm summer climate could explain 8.8 (3.5)% of EE during outdoor activities, which resulted in a 2.9 (2.7)% overestimate of EE during daily waking hours and a 1.9 (1.8)% overestimate of the total 24-h EE. Thus, the influence of temperature on HR may, at least in part, explain the previously reported overestimate of EE calculated using the HR/oxygen consumption relationship versus that calculated using the doubly labelled water method. We recommend correcting HR for the influence of climate in studies using HR profiles to determine outdoor physical activity levels and/or EE during summertime. However, when total daily EE or waking hours EE is assessed, even in subjects who are engaging in long intervals of outdoor play, the temperature correction required is minimal.

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Climate and the Exercising Child

Cited by 9 publications

References 60 publications

The Young Athlete

The Young Athlete

Summary and Outlook

Temperature-related overestimation of energy expenditure, based on heart-rate monitoring in obese boys

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