"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." IF YOU'RE an advanced runner, you're probably no stranger to pushing limits. But have you considered ...

“If you live near flatter terrain, or you don’t have those rolling hills, treadmill workouts can be hugely beneficial for a ...

High-intensity interval training, or HIIT, is a great way to torch calories, boost your metabolism and get a great workout in a shorter amount of time. And if you're a fan of hopping on the treadmill ...

Sprint interval training, or SIT, is super trendy right now. It’s a great way to improve your running speed and to get in a hard interval workout, and I’ll explain exactly how. But I also need to ...

After months of walking or running outdoors, taking your workout inside to a treadmill can be an adjustment. We all miss the fresh air and change of scenery that being outside affords, but running on ...

High-intensity interval training (a.k.a., HIIT) is a triple threat: “It’s quick, easy, and effective,” says Angela Gargano, a certified trainer and creator of Strong Feels Good & Pull-up Revolution.

The treadmill can be more than a stopgap on days when the weather doesn't cooperate or the baby is napping upstairs. Done right, treadmill training will help you maintain and improve your fitness ...

As women enter their 40s and beyond, hormonal changes can make it harder to build muscle, maintain energy, and manage body composition. High-intensity training is one of the most powerful tools for ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. New perk: Easily find new routes ...

Truth is, there’s no “better” option. Both treadmill and outdoor running have their perks, and both can help you build ...