david462 said:ahhh. man. well im 20 years old. im doing it 6-7 days a week. what rate should i try to keep my HR at? and to do this do i just turn down the resistance?
im doing this right now to burn fat and for cardio.
OK, first off you don't need to do exercise like that THAT frequently. I realize you may be very energetic and you are fortunate to have youth on your side, but you should probably temper some of that enthusiasm and plan for a longer and more realistic exercise program than a crash program.
True fitness cannot be had overnight, just like fat loss. 3 to 5 days a week for beginners should be plenty for now. Adjust your diet by making minor adjustments over time. If you are serious about taking up exercise, then you will want a program that is sustainable over time. 6 & 7 days a week ain't it.
As far as your Max HR, if you're just starting out go ahead and use the formula (220 - AGE) for a while until you have been exercising for a while and are physically and emotionally ready for a max heart rate test. This length of time will depend on the individual but a solid 2 months for somebody who is 20 years old and is otherwise healthy and fit should be enough. For someone older a longer prep time is in order. The MaxHR test is HARD so you have to be up for it. I've only done 2 in the past 3 years and each time I felt like I was going to throw up a lung.
Exercise between 70% to 75% most of the time and occasionally go to 80% and occasionally go to 65%. That's going to seem dead slow but that's OK. Even powerlifters periodize their training and include light days. Periodizing your training works.
Over time as your body adapts to training you can adjust your intensity and time upward. It's best not to do both at the same time though.
Next, read. Go through this forum and start reading old posts. There is some excellent information burried in there. Much of it won't make sense at first but it will come over time. The knowledge will come in handy as you progress with your fitness program and are ready for new challenges.