I actually use a lot of HIIT for cardio...
I'm "Team Bowflex" so that's where I get a lot of it from.
HVT will have me hit muscle failure in 18 - 20 minutes.
Max Trainer is a good whole- body cardio experience... "The Machine" to steal from The Princess Bride. Instructor led or profile workouts. Sprint/upper body work
I have a Bowflex Velocore bike... with a 16" screen. Allows for instructor led or ride programs... pick music and accompanying video. Requires subscription, but we'll worth it compared to staring at a blank wall. I use this for endurance... max VO2
Currently I'm at about 180 bpm max... low/resting around 56 bpm. I shoot for 130 - 140 for aerobic work.
I'm conscious of knee stains/ stress. The bike is most friendly... Max Trainer second... HVT can get stressed with some of the jumping or lunging exercises (speed of reps is very high).
I've tried rowing but for me the low back/knee stress was a non-starter.
I use a Polar H10 chest strap due to its compatibility with the machines and smart watches
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