From the 2008 National Health Interview Survey:
How often do you do LEISURE-TIME physical activities specifically designed to STRENGTHEN your muscles such as lifting weights or doing calisthenics? (Include all such activities even if you have mentioned them before.)
Read if necessary: How many times per day, per week, per month, or per year do you do these activities?
For this indicator, adults were classified as doing strengthening activities if they responded that they did these activities 2 to 28 times per week.
This Indicator uses Age-Adjustment Groups: