Issn Print: 0195-9131
Publication Date: 1996/05/01
VALIDATION OF SELF-REPORTED EXERCISE SESSIONS USING A TRI-TRAC ACCELEROMETER1137
A. D. Meier; J. M. Jakicic; R. R. Wing; B. A. Butler
Excerpt
It has been suggested that individuals over-report the amount of exercise they do. This study examined the validity of self-reported exercise sessions in obese females. Fifty overweight females (BMI=34.0±4.2 kg/m2) who were participating in a behavioral weight control program were included in this study. Subjects were randomly assigned to a long-bout (LB) or a short-bout (SB) exercise condition, with both groups instructed to exercise 30 min./d on 5 d/wk. LB was to exercise in one continuous bout (1-30 minute session/day). whereas SB was to divide the exercise into multiple 10 minute bouts (3-10 minute sessions/day). Subjects recorded their exercise in a daily exercise log. A Tri-Trac accelerometer was worn for a 1 week period to validate the daily exercise logs. LB reported 4.3±1.2 exercise sessions and the Tri-Trac recorded 3.7±2.1 exercise sessions (p>0.05). In the SB condition, subjects reported 11.8±3.7 exercise sessions and the Tri-Trac recorded 11.8±5.8 exercise sessions (p>0.05). The number of subjects in each group who under-reported the number of exercise sessions compared to the Tri-Trac was similar to the number who over-reported the number of exercise sessions. LB reported 38.4±8.6 min./session and the Tri-Trac showed a duration of 39.2±7.8 min./session (p>0.05), whereas SB reported 17.0±10.7 min./session and the Tri-Trac showed a duration of 17.6±6.8 min./session (p>0.05). These results suggest that individuals can accurately report their exercise in a daily exercise log. Moreover, the Tri-Trac may be a useful device for identifying individuals who inaccurately report their exercise behaviors.
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