Objective Measurement of Physical Activity in Youth: Current Issues, Future DirectionsTrost, Stewart G.Exercise & Sport Sciences Reviews: January 2001 - Volume 29 - Issue 1 - pp 32-36 Articles Abstract Author Information TROST, S.G. Objective measurement of physical activity in youth: current issues, future directions. Exerc. Sport Sci. Rev., Vol. 29, No. 1, pp 32-36, 2001. Second-generation activity monitors have revolutionized the way in which we measure youth physical activity. Use of the monitors avoids the problems associated with self-report methods and allows for the estimation of physical activity patterns over time. This article examines important methodological issues related to the use of activity monitors in children and adolescents. School of Human Movement Studies, The University of Queensland, Brisbane, Australia Accepted for publication: October 10, 2000 Address for correspondence: Stewart G. Trost, Ph.D., School of Human Movement Studies, The University of Queensland, Brisbane QLD 4072, Australia (E-mail: email@example.com). © 2001 Lippincott Williams & Wilkins, Inc.