Mood and Ambulatory Monitoring of Physical Activity Patterns in Youth with Polycystic Ovary Syndrome - 11/07/15

Doi : 10.1016/j.jpag.2014.10.010

Julie C. Michael, PhD ^1,^⁎ , Nermeen E. El Nokali, PhD ², Jessica J. Black, PhD ³, Dana L. Rofey, PhD ^2,³
¹ Divisions of Endocrinology and Behavioral Health, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania
² Division of Weight Management, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania
³ Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania

^∗Address correspondence to: Julie C. Michael, PhD, Johns Hopkins Division of Child and Adolescent Psychiatry, Bloomberg 12N, 1800 Orleans St, Baltimore, MD 21287; Phone: +1 443-287-3188; fax: +1 410-955-8691

Sous presse. Épreuves corrigées par l'auteur. Disponible en ligne depuis le Saturday 11 July 2015

Abstract

Study Objective

To provide initial insight into physical activity patterns and predictors of moderate to vigorous physical activity (MVPA) in youth with polycystic ovary syndrome (PCOS) by using a multisensor activity monitor.

Design

Cross-sectional study analyzing baseline MVPA data using real-time continuous monitoring of physical activity. Body mass index (BMI) and depressive symptoms were examined as predictors of MVPA.

Setting

A large, urban children's hospital in the United States.

Participants

Thirty-five youth (aged 12 to 21 years) previously diagnosed with PCOS (mean BMI = 38.0 kg/m²; mean age = 15.4 years, 79% white) who were participants in a behavioral lifestyle intervention.

Main Outcome Measures

Total steps, total MVPA, longest continuous bout of MVPA, and frequency of MVPA bouts lasting for 5 to 9 minutes and 10 or more minutes.

Results

Sixty percent of youth averaged at least 1 daily MVPA bout lasting 10 or more minutes, and 14% averaged a daily MVPA bout lasting 30 or more minutes. BMI was negatively correlated with MVPA bout duration (P = .04). Parental ratings of depression, but not self-report ratings, were predictive of participants' total MVPA (β = −.46; P = .01), number of 5- to 9-minute bouts (β = −.39; P = .03), and bouts of 10 or more minutes (β = −.35; P = .05).

Conclusion

Youth with PCOS may benefit from being prescribed multiple bouts of MVPA lasting less than 30 continuous minutes to meet national recommendations and achieve health benefits. BMI and parental endorsement of child's depression symptoms may be important to consider when assessing and prescribing MVPA to youth with PCOS.

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Key Words : Polycystic ovary syndrome, Physical activity, Obesity, Depression, Ambulatory monitoring