Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2019 ) 18 , 586 - 595

Research article
Daily Step-Based Recommendations Related to Moderate-to-Vigorous Physical Activity and Sedentary Behavior in Adolescents
Daniel Mayorga-Vega1, , Carolina Casado-Robles2, Jesús Viciana2, Iván López-Fernández3
Author Information
1 Department of Didactic of Musical, Plastic and Corporal Expression, Faculty of Humanities and Education Sciences, University of Jaen,
2 Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada,
3 Biodynamic and Body Composition Laboratory, Faculty of Education Sciences, University of Malaga,

Daniel Mayorga-Vega
✉ Department of Didactic of Musical, Plastic and Corporal Expression, Faculty of Humanities and Education Sciences, University of Jaen, Spain.
Email: dmayorgavega@gmail.com
Publish Date
Received: 08-03-2019
Accepted: 02-07-2019
Published (online): 01-12-2019
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ABSTRACT

Among adolescents empirical studies examining the total daily steps translation of the moderate-to-vigorous physical activity recommendation are scarce and inconsistent, and there are no previous studies with cadence-based steps and related to sedentary behavior. The main objective of the present study was to establish and compare the accuracy of daily step-based recommendations related to the moderate-to-vigorous physical activity and sedentary behavior thresholds in adolescents. The present study followed a cross-sectional design. A total of 126 adolescents (56 girls) aged 12-15 years old were assessed by ActiGraph GT3X accelerometers for eight consecutive days (moderate-to-vigorous physical activity, sedentary behavior, and steps) and the multistage 20-meter shuttle run test (cardiorespiratory fitness). ROC curve analyses showed that total daily steps (AUC = 0.94, 0.89-0.99; Threshold ≥ 11,111 steps/ day; P = 0.93; k = 0.67; p < 0.001) was a more appropriate indicator than cadence-based daily steps for distinguishing between physically active and inactive adolescents. Daily step-based thresholds represent a promising way to translate a total daily sedentary behavior threshold (e.g., total daily steps, AUC = 0.87, 0.81-0.93; Sensitivity = 0.87; Specificity = 0.70). Adolescents who met a favorable combination of step-based recommendations related to both physical activity and sedentary behavior thresholds had a higher probability of having a healthy cardiorespiratory fitness profile than those who did not meet either of them (e.g., risk ratio = 5.05, 1.69-15.08) or only the one related to physical activity (e.g., risk ratio = 4.09, 1.36-12.29). These findings may help policy-makers to provide accurate daily step-based recommendations that would simplify the physical activity and sedentary behavior thresholds for adolescents.

Key words: Steps/ day, step counts, walking cadence, cut-off point, thresholds, children


           Key Points
  • Total daily step-based recommendations are preferable than for those with cadence-based steps because they are not only simpler but also more accurate for classifying adolescents as physically active and inactive.
  • A threshold of total daily steps ≥ 11,111 steps/ day seems to be the most appropriate to distinguish adolescents that meet the physical activity recommendation among adolescents.
  • Daily step-based recommendations represent a promising way to translate a total daily sedentary behavior threshold among adolescents.
  • Adolescents who met a favorable combination of step-based recommendations related to both physical activity and sedentary behavior thresholds had a higher probability of having a healthy cardiorespiratory fitness profile than those who did not meet either of them or only the one related to physical activity.
 
 
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