Learning Objective 1: 1. Describe current recommendations for physical activity in adolescents.
Learning Objective 2: 2. Describe the physical activity measurement capabilities with accelerometry.
Methods: Mixed methods were used to examine adherence to PEP and to obtain feedback from interviews with parents and teens. Teens were to wear the MTI Actigraph ® accelerometer while awake 5 days/week during PEP. At least 10 hours/day of accelerometer data were required for the analysis. Results: Twenty teens participated (13 T1DM, 2 T2 DM, 5 obese): 11 Hispanics, 9 Non-Hispanics; 14 males, 6 females. Mean age was 14.3 ± 1.6 yrs. Mean A1c levels were 9.1 ± 1.9 (T1DM) vs. 7.2 ± 0.7% (T2DM). Mean duration of moderate to vigorous physical activity (MVPA)/day was 58.9 ± 26.7 minutes, the mean intensity level was 3.9 ± 0.4 metabolic equivalents (METS), and the frequency of attaining 60 minutes of MVPA was 33.1 ± 27.5 % . There were no significant differences in adherence among groups. A limitation is that the teens wore the accelerometer the required 10 hours/day an average of 56 ± 30 days. Themes in interviews were gaining responsibility to exercise, improving glucose control, needing flexibility in routines, and disliking wearing the accelerometer. Conclusion: This is the first study to explore the use of accelerometers to measure longitudinal exercise adherence. Teens achieved moderate levels of activity close to the recommended duration of 1 hr/day, but not at the recommended frequency of 5 days/week. Further study is needed to develop and test strategies to promote exercise and measure adherence in this population.
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