There were five different questions about physical activities at work and leisure time in the questionnaire. They covered duration, frequency, intensity and a combination of all three. One of them had a good correlation with maximal oxygen uptake: Which of the following do you think you could perform – jogging two kilometres at high speed without stopping, jogging two kilometres without stopping, jogging two kilometres, but have to stop a couple of times, walk two kilometres without stopping, nothing of the above, do not know. The correlation was 0.498 and p < 0.001 (Spearman) and 0.504 (Pearson) which is regarded as a substantial relationship [24].
There were five different questions about physical activities at work and leisure time in the questionnaire. They covered duration, frequency, intensity and a combination of all three. One of them had a good correlation with maximal oxygen uptake: Which of the following do you think you could perform – jogging two kilometres at high speed without stopping, jogging two kilometres without stopping, jogging two kilometres, but have to stop a couple of times, walk two kilometres without stopping, nothing of the above, do not know. The correlation was 0.498 and p < 0.001 (Spearman) and 0.504 (Pearson) which is regarded as a substantial relationship [24].
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