The ultimate ten-minute workout: No weights, no gym, just you

You don't need to spend hours in the gym to get fit — if you can find 10 minutes, you can do it.

I call this the pyramid workout, and it's far and away my go-to routine because you can do it anywhere, anytime, with anyone. No equipment or large space is required. I do this in my bedroom when I don't want to go to the gym. I do it in my hotel room when I'm on the road. I do it on the beach when I'm on vacation —you get the idea.

So, only got 10 minutes? Go for it:

100 jumping jacks

90 butt kickers

80 wide jogs in place

70 alternating kicks

60 pikes

50 Russian twists

40 high knees

30 mountain climbers

20 squat thrusts

10 slow push ups