Description

VIG20DTP2 reports the time period (minutes or hours) during which sample adults engaged in vigorous leisure-time physical activities lasting at least 20 minutes. This variable must be interpreted in conjunction with the variable VIG20DNO2, which reports the duration in number of units corresponding to the time period reported in VIG20DTP2. For example, a respondent who jogs for 30 minutes would have a VIG20DNO2 value of 30 and a VIG20DTP2 value of 1 (which is the IPUMS NHIS code for "minutes").

VIG20DMIN2, a recoded variable created by the staff at the National Center for Health Statistics, draws upon the information in VIG20DNO2 and VIG20DTP2 and reports the duration of vigorous physical activity (for at least 20 minutes) in a standardized unit of time, minutes.

Vigorous activities are described in the survey questionnaire as activities that "cause heavy sweating or large increases in breathing or heart rate." The Field Representative's Manuals for 1997 forward provide examples of vigorous leisure-time physical activities, although these examples were not routinely shared with respondents. These examples include fast walking, fast bicycling, jogging, strenuous swimming or sports play, vigorous aerobic dance, and strenuous gardening.

Comparability

Due to an error in the wording of the survey question, VIG20DTP2 is only available for quarters 1 and 2 of 1997. At that time respondents were asked to report how long they engaged in physical activities lasting a minimum of 20 minutes. This mistake was corrected beginning in quarter 3 of 1997, when the minimum duration of physical activity was lowered to 10 minutes.

To allow analysis of vigorous leisure-time physical activity across all quarters of 1997, the National Center for Health Statistics created "transitional" variables for 1997 only, covering respondents who exercised vigorously for at least 20 minutes.

Researchers who wish to analyze data from multiple years on adults' leisure-time vigorous physical activity should restrict their data from 1997 to quarters 3 and 4 and use variables beginning with "VIG10."

Universe

Availability

• 1997

Weights

• 1997 : SAMPWEIGHT