Dale, D. L., & Corbin, C. (2000). Using accelerometers and hart-rate monitors in elementary physical education: findings and future challenges. Medicine and Science in Sports and Exercise, 32(5), Supplement abstract 340.

This study used accelerometers and heart rate monitors to measure physical activity in children in physical education classes and at lunchtime. The validity and accuracy of these instruments was evaluated.

Accelerometry revealed boys to be have significantly higher scores during lunchtime but not during physical education. Heart rates varied greatly and did not yield gender differences.

These findings do not support the use of these devices for monitoring physical activity because of the large variation in heart rates observed.

Implication. Heart rates are not a valid measure of physical activity in children.

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