On this page: About the National Data | Methodology | History
About the National Data
Data
Baseline: 51.1 percent of students in grades 9 through 12 participated in muscle-strengthening activity on 3 or more days of the past week in 2017
Target: 56.1 percent
Numerator
Number of students in grades 9 through 12 who participated in muscle-strengthening activity on 3 or more days of the past 7 days.
Denominator
Number of students in grades 9 through 12.
Target-setting method
Percentage point improvement
Target-setting method details
Percentage point improvement from the baseline using Cohen's h effect size of 0.10.
Target-setting method justification
Trend data were evaluated for this objective, but it was not possible to project a target because the trend was moving away from the desired direction. A percentage point improvement was calculated using Cohen's h effect size of 0.1. This method was used because it was a statistically significant improvement from the baseline and the Healthy People 2030 Workgroup Subject Matter Experts expected the data to move in the desired direction during the next decade.
Methodology
Questions used to obtain the national baseline data
(For additional information, please visit the data source page linked above.)
From the 2015 Youth Risk Behavior Surveillance System:
Numerator:
During the past 7 days, on how many days did you do exercises to strengthen or tone your muscles, such as push-ups, sit-ups, or weight lifting?- 0 days
- 1 day
- 2 days
- 3 days
- 4 days
- 5 days
- 6 days
- 7 days
History
Comparable HP2020 objective
Retained, which includes core objectives that are continuing from Healthy People 2020 with no change in measurement.
Revision History
Revised.
In 2024, the baseline race/ethnicity data were revised at the request of the data provider.
1. Effect size h=0.1 was chosen to correspond with 10% improvement from a baseline of 50%.
