Participants were asked how often and how long in the 2 weeks before the interview they had walked, bicycled, and performed sport activities and light and heavy household activities. The total time spent on physical activity was calculated by multiplying the frequency by the duration of each activity, divided by 14.
Hand grip strength
Martin Vigorimeter
Hand grip strength of the dominant hand was measured three times. The highest value was used.
The SFQ consists of four statements which the person answers by checking an item at a 7-point scale. In this study a 3-point scale was used (yes that is correct, that is more or less correct, and no that is not correct).
Balance
Four-test balance scale
The Four-test balance scale includes four timed static balance tasks of increasing difficulty that are completed without assistive devices. Respondents were asked to hold each position for 10 seconds. In this study participants performed three tasks: side-by-side, semitandem, and tandem. If respondents could not perform at least one of these three tasks, then balance was coded as poor.