Abstract
1108 The purpose of this study was evaluate the suitability of the CSA activity monitor for assessment of physical activity. Activity data have been compared to total energy expenditure (TEE) and its derivatives measured by the doubly water (DLW) method. Seven young athletes (speed skaters)(mean age 18.5±1.0 y) were monitored by the CSA activity monitor for 8 consecutive days. Mean activity counts (cnts/min) were correlated against TEE, TEE-Resting Metabolic Rate (RMR), TEE-RMR/kilogram of body mass and Physical Activity Level (PAL=TEE/RMR). All measurements were performed twice during two different training periods. During the first period the main exercise performed was running whereas the second period mainly involved technique training. Activity counts were significantly correlated to all energy estimates (r=.90-.93, P<0.01) during the first period. When information about non-registered time was added to activity counts in a multiple regression analysis, the explained variance for TEE was 78%. No significant correlations were observed during the second period. The results indicate that the CSA activity monitor accurately assesses TEE and its derivatives during training periods which involves running. Activity counts is not related to energy estimates during a period of specific training (eg. inline skating, slideboard training).
Published Version
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