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/ Source: TODAY

TODAY is kicking off a new series, "Secrets of Fitness Trends" with lifestyle and fitness correspondent Jenna Wolfe.

First up: running. Running is a great way to stay in shape. It's easy, inexpensive and one of the best exercises for your cardiovascular health. But if running is your only activity, you're not getting a well-rounded workout. Add to your fitness routine by targeting the body parts you're not using when you run —your upper body.

Here's how you can get the most from your regular jog:

Start by running for 2 minutes.

Then do 20 push-ups.

Do that 10 times.

You can alternate with squats, slow mountain climbers and tricep dips.

Jenna Wolfe with running tips.TODAY

And if you have access to a class, these are three that will incorporate all the different muscles in your body.

Jenna Wolfe with running tips. TODAY