<qa>  What was the standardized verbal encouragement given at 30-second intervals during the 400-m400 meter self-paced walk 400-m W. Participants were instructed to walk at a pace they could maintain without overexerting themselves until they complete the 400-m W or could no longer continue. Standardized verbal encouragement was given at 30-second intervals during the walk. Participants taking longer than 15 minutes to complete the 400-m W were considered unable to successfully perform the test. 