&gt; Also &quot;approaching the maximum recommended heart rate for her age [...] may well have exceeded it, thereby jeopardizing her health and safety&quot; seems a bit far-fetched - I&#x27;m not a small fellow by any means and I struggle to get my heart rate up to my max (~180bpm), much less over it[1].<p>Hmm. I&#x27;m pretty overweight and can easily go over 180bpm if I&#x27;m not watching myself on the treadmill - 5 minutes at 10-11kph will do it.