If you haven't already discovered the numerous benefits of interval training then please do yourslef a favor and read this article and see for yourself why interval training is quickly becoming the number one personal workout program for both it's fat burning potential, it's ability to build muscle strength and it's cardiac benefits.
Interval training is able to build leg muscular strength and endurance, melt fat off your body and give your heart a good workout simply because it is two forms of cardio in one.
Interval training entails the back and forth of two different cardio exercises that typically provide different results and are of varying intensities like jogging and sprinting. Interval training workouts are cardio sessions on steroids because they burn twice as much fat and burn twice as many calories in half the amount of time.
The great thing about interval training is that you can do it anywhere... on the beach, at the park on a hike, the possibilities are endless... Once you've stretched out and you're warm you can begin your interval training session with a light jog. My rule of thumb is that you should be able to carry a light conversation with someone for this to be considered a light jog. You'll do this for two minutes and then you'll pick it up a notch...
Basically what you're going to do is jog for two minutes and then once those two minutes are up you're going to pick up your jog to an all out sprint! Jog and then sprint. Jog and then sprint. Jog and then sprint. All in two minute intervals. Back and forth. Back and forth.
Interval training gives you a ton of benefits in a fraction of the time it would take you if you were to replace interval training with individual workouts that accomplish the same results as interval training - build more muscular legs, burn fat, burn calories and a cardio workout.
You can continue on with your hour long marathon cardio sessions or you can try interval training today.