I tried doing HIIT on a treadmill at my gym alternating between 3.6 mph and 10mph for 1 min each for 20 minutes total. My concern is that 10mph is not my sprint speed/all out. But am a little frightened of going over 10mph as I might fall, hit my head, and look like an idiot.
Does anyone do HIIT on a treadmill? Does anyone do over 10mph? I figure I would need to go 12mph. If someone is going that fast, I'd give it a shot.
Does anyone do HIIT on a treadmill? Does anyone do over 10mph? I figure I would need to go 12mph. If someone is going that fast, I'd give it a shot.