| 我有一個問題想請教各位專家:To prevent injuries from over-exhaustion in high-intensity work, the
 International Labor Organization (ILO 1983) has recommended that
 the average heart rate at work should not exceed 150 beats/min. And
 the peak heart rate should not exceed 180 beats/min.
 The physiological basis for these recommendations is unclear to me.
 Are there any scientific basis for the recommendations?
 I have searched it for a long time, but it is still not available.
 If you have any literature supporting the recommendations,
 please inform  me as soon as possible. Thank you very much!
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