Old 09-04-20, 06:57 AM
  #46  
basscadet
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Most people who think they're doing HIIT are not doing HIIT. HIIT is not climbing a hill, it is max effort sprinting every 1-2 minutes until your legs are jelly. If you can sustain what you think is HIIT for more than 10-15 minutes, it ain't HIIT. Your HR will be maxed and you will be gassed, not really safe to do on a bike IMHO.
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