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On this page: About the National Data | Methodology | History
About the National Data
Data
Data source: National Health Interview Survey (NHIS), CDC/NCHS
Baseline: 27.6 percent of adults aged 18 years and over performed muscle-strengthening activities on 2 or more days of the week in 2018
Target: 32.1 percent
Numerator
Number of adults aged 18 years and over who report doing physical activities specifically designed to strengthen muscles at least twice per week.
Denominator
Number of adults aged 18 years and over.
Target-setting method
Projection
Target-setting method details
Linear trend fitted using weighted least squares and a projection at the 50 percent prediction interval.
Target-setting method justification
Trend data were evaluated for this objective. Using historical data points, a trend line was fitted using weighted least squares, and the trend was projected into the next decade. This method was used because three or more comparable data points were available, the projected value was within the range of possible values, and a projection at the 50 percent prediction interval was selected because no additional information could be used to assess the trend line, so the target was based on the projection.
Methodology
Methodology notes
For this indicator, adults were classified as doing strengthening activities if they responded that they did these activities 2 to 28 times per week.
History
Comparable HP2020 objective
Retained, which includes core objectives that are continuing from Healthy People 2020 with no change in measurement.
1.
Because Healthy People 2030 objectives have a desired direction (e.g., increase or decrease), the confidence level of a one-sided prediction interval can be used as an indication of how likely a target will be to achieve based on the historical data and fitted trend.