This 20-Minute Cardio Workout Spikes Your Metabolism for 36 Hours Without Stepping Foot in a Gym originally appeared on Men's Fitness. Can't get to the gym but need to get some cardio in? Changes are ...

Now that the weather is beginning to turn, you’d be forgiven for not wanting to lace up your running shoes and brave the rain. But does that mean you need to let your cardio slip? Definitely not. With ...