If you want a workout partner who's in great shape, has lots of energy and is always in a good mood, look no further than your four-legged friend. Whether you're looking for a long-distance partner, a trail running companion or a fast-paced sprinter who'll push the pace, here are 15 dogs that fit the bill.

Man's (and woman's) best friend can also make an excellent running partner! But before the two of you hit the trails, take a moment to consider how to prepare and stay safe.

This science-backed running workout hits the sweet spot between HIIT training and steady-state cardio. With this method, you burn more calories than steady-state cardio and build lean, strong muscle without mindlessly logging mile after mile.

Runners are a frequently injured group. But even a small amount of regular strength training improves your structural fitness so you can stay healthy while running. Here are the most effective strength workouts you should be doing if you're a runner.

Running and cycling are both excellent forms of aerobic exercise. Both allow you to engage large muscle groups in a sustained activity, which elevates your heart rate and delivers a wide variety of health benefits. But which delivers more benefits? You decide.