Physiological and thermoregulatory responses to exercise in a cold environment have been well documented in adults. However, limited information is available regarding the physiological and perceptual responses in children exercising in a cold environment. The purpose of this study was to compare the metabolic, cardiorespiratory, and perceptual responses of children performing submaximal exercise in a cold and neutral temperature. Sixteen children (8 male, 8 female), with a mean ± SD age, height, and weight of 11.4 ± 0.9 yrs, 149.4 ± 8.8 cm, and 40.0 ± 7.2 kg, respectively, participated as subjects in this study. Laboratory assessments occurred on three different days. On the first day of testing, a graded exercise test on a cycle ergometer was administered to determine ventilatory threshold (VT) and VO2max (1.21 + 0.18 I-min-1, 1.74 + 0.21 1-min-1, respectively). On seperate days, subjects cycled in 5°C or 22°C for 30 minutes at an intensity corresponding to VT (103 ± 11 W). The order of testing was counterbalanced. V02, HR, and RPE were assessed every 5 minutes; blood samples from an indwelling catheter were taken every 10 minutes for blood lactate (LA) determination. Data were analyzed using arepeated measure ANOVA. V02, VE, HR, and LA responses were significantly (p < 0.05) higher in the cold (1.36 ± 0.18 vs 1.14 ± 0.18 1-min-1, 35.6 ± 5.3 vs 29.2 ± 5.8 1-min-1, 165.7 ± 12.3 vs 155.9 ± 12.9 bpm, and 2.18 ± 1.18 vs 1.53 ± 0.84 mmol-l-1, respectively) (Mean ± SE). RPE values tended to be higher in the cold (13.6 + 3.4 vs 12.6 + 2.9); however, the difference was not statistically significant (p > 0.05). More research is needed to determine the factors responsible for cold-induced alterations in the exercise response. / School of Physical Education
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/184276 |
| Date | January 1992 |
| Creators | Marsh, Melinda L. |
| Contributors | Ball State University. School of Physical Education., Mahon, Anthony D. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | ix, 65 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
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