, Lulu! You're always welcome to our group of Turtles. It sounds like you have a really great, upbeat attitude in spite of your challenges. Jump on in!
Ariana, sounds good! One thing I would suggest is to do your warm up flat--or pick an elevation and stay there. No changes for that 5 minutes, okay? THEN kick it into high gear. I wouldn't worry about the heartrate thing on the machine. Instead, go by this rule: if you can sing, it's really easy. If you can talk but not sing, that's a little harder. If you can answer questions or converse in short sentences, that's harder (that's about a 6-7/10). If you can gasp 1 or 2 word answers, you're at an 8 or a 9. If you can't even manage "no", you're 10! So you should be going from:
3-4 (talking)--warm up for 5 minutes
**to**
7-8 (short-gasp answers) for 30 seconds
**to**
4-5 (talking) for 90 seconds
{repeat the last 2 as many times as your plan}
**to**
2-3 (cooldown) for 5-10 minutes
Hope that helps!
Oh yeah--I don't know what kind if fitness you're in, I don't know how long you've been exercising, limitations, abilities, etc. So this is the standard advisement:
Do this kind of workout (interval training) every OTHER day. The days in between, feel free to throw in either an LSS (long slow steady) workouot or take the day off. But for at least a few weeks, give your body the recovery time of 48 hours in between.