Deficit Reverse Lunge + Single-Leg RDL

If your single-leg strength and stability need some work, then combining reverse lunges with a single-leg RDL would be a great way to start.

Adding a deficit to the reverse lunge upgrades the difficulty, but you can always start without. You can also go the other route and use the deficit for the deadlift component too, if you have the range of motion.

The horizontal nature of this exercise can help you develop athletic speed and help you prevent hamstring injuries.

If you're just after aesthetics though, this has you covered too. Develop that glute and upper hamstring area (some call it the "glute-ham tie in") and get a great butt pump with this killer combination exercise. – Gareth Sapstead