Lunging is beneficial in more ways than one. Whether you're trying to tone your quads, build your butt muscles or strengthen your calves, lunging is the perfect exercise to help you reach your goals. Better yet, the functional, multi-joint exercise can be modified to meet your fitness needs, so there's really no excuse.
As mentioned, a lunge is an exercise multitasker. It recruits your hips, glutes, quads, hamstrings, and core and the hard-to-reach muscles of your inner thighs.