One of the fitness industry's most effective tools has been around for years and is a favorite of boxers. Here's a hint of what it is, it's made out of a rope and it has two handles attached to it. If you guessed a jump-rope give yourself a pat on the back.
Using a jump-rope is one of the most effective cardiovascular workouts burning up to 1000 calories per hour. It tones muscle in the entire body and it is extremely easy to use. All you need is a jump-rope (costs between 10-20 dollars) and a pair of sneakers with good cushioning in them. I recommend using tennis sneakers because they are designed for a similar type of movement. Using a jump-rope is great because you will not need to leave your house for an extended period of time and you can jump in front of a television or while listening to music if you get bored.
Jumping rope is a different type of movement then you might be used to so I would recommend to start jumping for smaller periods of time and then slowly work your way up to 30 min -- 1 hr.
Make sure while you are using a jump rope that you only jump one time per swing. When you get proficient enough at this start learning more difficult jumps like jumping on one leg, jumping from side to side.
While you are jumping try to jump on a softer surface that is preferably not concrete, it will put more stress on your knees.
