We all need it.

We don't all get it.

There are guidelines for how much we should exercise.

The U.

S.

Department of Health and Human Services says.

If we're doing moderate aerobic exercise, so think walking, swimming or dancing.

We should do at least 2.5 hours of it per week.

If we're doing vigorous exercise like jogging, swimming laps or mountain biking will need at least an hour and 15 minutes a week, and that should all be spread out across the week.

The government also recommends strength training at least twice a week and working all major muscle groups when we do.

And CNN's Dr Sanjay Gupta agrees that working out like this can help us live to 100.

Yeah, I think the health benefits of exercise are too numerous to probably even saying a little session like this.

You know, it could reduce your risk of certain diseases.

You know it can improve your muscle mass.

Problem is, fewer than a quarter of Americans are actually getting the amount of exercise they should get.

Ah, lot of people have started turning tomb or extreme exercise or high intensity interval training.

This is when you exercise really intensely for a period of time, usually just under a minute.

Take a little break, do it again, and you do that cycle over and over again for 30 to 45 minutes.

The big argument for high intensity interval training is that not only might it help your metabolic profile overall help you lose weight, help you build endurance for your heart and your lungs.

But it might do it better then if you're doing the regular low interval training.

But here's a rule of thumb that you should remember.

Your maximum heart rate is typically 220 minus your age.

So for me, that's right around 170.

You don't wanna let the exercise that you do really get over that range.

First of all, it's potentially dangerous.

Second of all, you're probably not getting the benefits of exercise as much as you otherwise would.