What are some good cardiovascular exercises that work?

is running up and down stairs a good work out? if so, how many should I do a day?

if I exercise for like 45 minutes in the morining then eat breakfeast that good

I cant afford going to my gym anymore and im just thinking of doing some of those cardio/body sulpting videos... But I don't ...

Preferably with as little or compact of equipment as possible. And no exercise bike... I can't use them because of my knees.

wats a good exercise 4 a nice back & arms,plus inner thighs??

Whats a good way 2 get motivated for exercise?

what would be a good thing to do for bicep wrok outs.like what exercises should I do?how much should I do them?what foods sho...

does anyone know any good exercises to lose fat of your lower stomach and to make calf and upper arm muscles thinner

What are good work out videos for yoga, pilates, aerobics, etc.? Is there a specific trainer and or brand that's good?

Remember those machines where a belt wrapped behind you and made your fat shake while you stood there. how were those suppos...