The Caltrac accelerometer as a physical activity monitor for school-age children.

@article{Sallis1990TheCA,
  title={The Caltrac accelerometer as a physical activity monitor for school-age children.},
  author={James F. Sallis and Michael J. Buono and J J Roby and David Carlson and Judith A. Nelson},
  journal={Medicine and science in sports and exercise},
  year={1990},
  volume={22 5},
  pages={698-703}
}
The performance of the Caltrac accelerometer was studied in elementary school-age children under field and laboratory conditions. In Study 1, 35 children (20 boys, 15 girls, mean age = 10.8 yr) wore the accelerometer and a heart rate (HR) monitor for 2 d. Caltrac activity counts per hour were compared to the mean "activity HR", which was calculated by subtracting the mean of the five lowest HRs of the day from each recorded HR. Pearson r's between accelerometer and activity HR were 0.54 (P less… CONTINUE READING