There's some sliding, so anything that isn't your body could catch/be crushed. HRMs are two pieces, right? The chest piece and the watch piece? The watch would definitely be a problem, and the chest piece likely would be for any moves where you need to have your chest against the bar or for any time you're wrapping fabric around your back/chest.
I started taking a mixed aerials circus class and it's AWESOME, but I have no idea how to track the calorie burn. I know I can just log the minutes manually, but I do this twice a week and don't want to be way off on my calories burned in the tracker.
The class is an hour and a half long; the first half hour is dedicated to warming up, which varies every time. It includes a few minutes of stretching at the beginning, then some cardio combination for 10-15 minutes (like running laps around the studio, jump roping, hula hooping, or some combination of several exercises in 30 second - 1 minute intervals before switching to a new one) then about 10 minutes of deeper stretching. Then the next hour is dedicated to the aerials. We work on trapeze, lyra, and silks, and if we're not learning a trick with the instructor, we're working on a piece of equipment on our own. There's some down time, a couple minutes at a time, between getting on the equipment and the next piece, or maybe you're getting chalk for your hands, or taking a water break, or listening to the instructor and watching her demonstrate, etc.
So I'm guessing there's about half an hour of cardio and stretching warmups and then probably like half an hour/45 minutes of actual on-equipment time? Just not sure what a reasonable estimate would be. (I also don't have a heart rate monitor, and probably couldn't wear one anyway because we're not supposed to wear anything that could catch on the bars or fabric.)
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