Effect of Monitor Placement and of Activity Setting on the MTI Accelerometer Output

• DOI: 10.1249/01.mss.0000048829.75758.a0
• Publication Date: 2005-12-13T18:03:23Z
• Authors: AGNETA YNGVE; ANDREAS NILSSON; MICHAEL SJ??STR??M; ULF EKELUND
• Keywords: Treadmill; Metabolic equivalent; Pace

YNGVE, A., A. NILSSON, M. SJÖSTRÖM, and U. EKELUND. Effect of Monitor Placement Activity Setting on the MTI Accelerometer Output. Med. Sci. Sports Exerc., Vol. 35, No. 2, pp. 320–326, 2003. Purpose To examine effect monitor placement (hip vs back) activity setting (treadmill track) output from Manufacturing Technology Inc. (MTI), (model WAM 7164). Methods: In a laboratory study, 28 subjects (14 men, 14 women) walked at normal pace, fast jogged comfortable pace an indoor track. These activities were repeated treadmill using individual speeds track locomotion. Oxygen uptake was measured simultaneously portable metabolic system. One worn hip one lower back. field 34 (18 16 each wore two monitors low back placement) for seven consecutive days. Results: ANOVA showed significant effects (P = 0.009) < 0.001), indicating that counts differ between different body sites settings (track treadmill). Gross energy expenditure predictive equations developed thereafter evaluated in study. Time spent moderate vigorous intensity physical 38% 85% 0.001) higher when calculated treadmill-based as compared to track-based equations. Free-living estimates not affected by placement. Conclusion The relationship during locomotion is setting-specific. When habitual assessed free-living subjects, derived may overestimate time activity, whereas does influence interpretation data.