This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.Obesity can lead to many diseases. Childhood obesity increases the risk of early development of these diseases. Promoting exercise in children helps to combat childhood obesity; however, people who work with children must ensure that children exercise safely. The environmental conditions in which a child exercises can affect exercise success and safety.
Aims1) To compare the heat acclimation responses of 9-12 year old lean vs. obese boys during eight 70 minute exercise sessions conducted in a warm environment within a 14 day period. (Trials 1-8)2) To determine the critical environmental conditions defining the upper limit of the prescriptive zone in 9-12 year old acclimated lean and obese boys during light-to-moderate intensity exercise. (Trials 9-12)Hypotheses:1) In response to an exercise in the heat acclimation protocol, the degree of acclimation will be attenuated in obese compared to lean 9-12 year old children. (Trials 1-8)2) During light-to-moderate intensity exercise in a warm environment, the critical environments for heat-acclimated obese vs. lean 9-12 year old children will be shifted downward on a psychometric chart, towards a lower critical water vapor pressure. (Trials 9-12)
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