Lunges

Muscles worked quads, glutes, hamstrings This is probably one of the best leg workouts you are going to get without a gym and luckily its pretty straightforward. All you have to do is take a large step with one foot and bend your knee to a 90 degree angle (as in the image above). Although you can walk forward with each lunge you dont have to. You can stay in the same spot if you want and just keep switching legs. Heck, you could even do these in the shower.