1. HIIT2FIT was founded by two national athletes who wanted to use their experience in their training to help others get into fitness. 2. Besides the Mean class, HIIT2FIT also offers the Lean class, which is a Hiit-based indoor cycling session. 3. The heart rate tracker has to be strapped snugly just under your chest for accurate tracking. You can rub some water underneath the strap to reduce chafing. It’s better to stay in the orange heart rate zone (80-90 per cent of maximum heart rate) longer than the red (over 90 per cent of maximum heart rate) during a session, so you get an effective workout but don’t burn yourself out.