ArticlePhysical Activity in Physical Education Teacher or Technology EffectsGrissom, Traci MspSc; Ward, Phillip PhD; Martin, Beth MA; Leenders, Nicole Y.J.M. PhD Author Information Scottish Corners Elementary School, Dublin, Ohio (Ms Grissom); The Ohio State University, Columbus (Drs Ward and Leenders); and the Wyandot Elementary School, Dublin, Ohio (Ms Martin). Corresponding author: Phillip Ward, PhD, The Ohio State University, 1760 Neil Ave, Columbus, OH 43210 (e-mail: [email protected]). Family & Community Health: April 2005 - Volume 28 - Issue 2 - p 125-129 Buy Abstract This study assessed if wearing a heart rate monitor influenced student activity levels in elementary physical education. Data were analyzed for 4 students using an alternating treatment design to assess differential effects between accelerometer activity counts obtained from students when wearing the heart rate monitor and when they were not wearing the monitor. Results show that (a) there was no difference in activity counts between the 2 conditions, (b) boys had higher means than girls, and (c) the variance between more and less active boys was greater than the variance among the girls. © 2005 Lippincott Williams & Wilkins, Inc.