How hard I should push myself?
I started to enjoy pushing my limits, thankfully :) I use elliptical cycle for cardio for at least 30 mins a day.
On average I use it at level 8/8, with 14kmh and about 160HR. At the end, for 5 to 15 minutes, I go faster at 16~ and I feel like it's almost impossible to continue. I sortof feel like losing myself physically. I avoid pain in my muscles. When I absualtely have to stop, I stop. I don't use HR but I suppose at that point I'm around 180 or more when I use my hand to count.
Occasionally, I feel like my heart stops beating or slows down for a few seconds on random times. Maybe once a week. But I feel good. Maybe that's related and is saying me to stop pushing?
I'm 100kg, m, 22, taking 1500-2000cal daily. My BMR: 1700.
The answer should be in terms of how hard I should push myself in terms of HR, feeling and post cardio effects.