The Short questionnaire to Assess Health-enhancing physical activity (SQUASH) is a Dutch questionnaire developed by the Dutch National Institute of Public Health and the Environment to give an indication of habitual physical activity level (section: lifestyle & environment).
The SQUASH was structured to enable the assessment of compliance to physical activity guidelines: the Dutch Healthy Exercise Norm. These guidelines are different for children (<18 years), adults (18-55 years), and older adults (>55 years)1 (table 1). The SQUASH was implemented in Lifelines 1A Questionnaire 2. The raw data were used to calculate SQUASH sum scores.

Habitual physical activity is measured by asking questions about “an average week in the past months”.
Questions were distributed over 4 categories:

1. Commuting (incl. walking and bicycling to and from work)
2. Leisure time (walking, bicycling, gardening, odd jobs and sports)
3. Household
4. Work and school

For each category, three main aspects are assessed¹⁾:

• Frequency (number of days in an average week)
• Duration (hours and minutes per day)
• Intensity (light, moderate, or vigorous)

NB: for household and work/school activities, intensity was measured in light/moderate and vigorous NNB: for work/school activities, frequency was omitted from some versions of 1A questionnaire 2.

To make it easier for subjects to know which type of activities were applicable, examples of activities were mentioned for sports, household activities, and activities at work²⁾.
Hobbies were not included in the SQUASH. These activities often have very low MET values (<2 MET), and were therefore considered to contribute negligibly to habitual activity levels. Hobbies that do have meaningful MET values are often noted as sports.
Note that the SQUASH questionnaire was not designed to measure energy expenditure, but to give an indication of the habitual activity level.