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The purpose of this study is to determine reproducibility and relative validity of the Short QUestionnaire to ASsess Health-enhancing physical activity (SQUASH).

Participants (36 men and 14 women, aged 27–58) were asked to complete the SQUASH twice with an inbetween period of approximately 5 weeks. In addition, participants wore the Computer Science and Applications (CSA) Activity Monitor for a 2-week period following the first questionnaire.

The Spearman correlation for overall reproducibility of the SQUASH was 0.58 (95%-CI 0.36–0.74). Correlations for the reproducibility of the separate questions varied between 0.44 and 0.96. Spearman's correlation coefficient between CSA readings and the total activity score was 0.45 (95%-CI 0.17–0.66).

In conclusion, the SQUASH is a fairly reliable and reasonably valid questionnaire and may be used to order …