8 Items That Double As Homemade Workout Equipment

“You can keep this on during your regular workouts as long as there is no pain or discomfort,” says elite trainer Jen Selter. “If you have stairs in your house or apartment building, I would also recommend using the backpack to work out the glutes and quads on the stairs. That way you’re also getting in a bit of cardio, as well.” Filling suggestions: water bottles or books. RELATED: You Can Do This Stairs Workout in 15 Minutes—at Home