I use my Fulcrumator with a single weight setup, and do swings. I alternate Fulcrumator swings with aerobic step ups every 3 minutes for at least 20 minutes. I also ride my Assault Bike for 20 minutes. I like to train daily , but life, wife, pharmacy, and old age frequently present obstacles.
The Fulcrumator’s revolving handles and momentum leverage properties allow for a rapid contraction/relaxation phase which is crucial for preload of the heart.
I believe the most important way of implementing “cardio” is the basic methods. Walk or ride bike back and forth to work, use stairs instead of elevator, stand up while doing office duties/administration etc. What you implement in daily life will always be of greater importance.
Whether HIT 2-3 times a week will compensate for a sedentary lifestyle - I believe so - but the combination of the two must be superior. For myself, I noticed my lifting somehow got easier after riding my bike to work regularly.
There is no need overthinking this. My take on kettlebell swings is just another good middle way of doing things. You will be good at - kettlebell swings - while raising the pulse convincingly.
10-1 is indicating the rep scheme. I start doing 10 reps, then 9, then 8, all the way down to 1, then built back up again, going 1, 2, 3, up to 10. Simple ascending/descending.