Lunges and other single-leg variations are great for improving size, strength and overall athletic performance.
To increase glute and hamstring activation, lunge with a forward torso lean. It’s easy to maintain a straight back position and puts more focus on your glutes and hamstrings.
For more focus on your quads, keep an upright torso.
Shorter strides for more quad emphasis, or longer strides for more hamstrings/glutes.
Avoid hyperextending your lower back to achieve an upright torso.