Split squats are a great alternative to lunges. They involve far less forward motion, and they still give your glutes the extra special attention they need. Your quads may be doing most of the work, but your glutes are brought in for stability.
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Stand with your feet spread about 1 meter apart, one far in front of the other. Place your hands on your hips for balance as you dip into the squat.
It will feel exactly like a lunge, but instead of going forward or backward you simply stay in place. Shift your weight off the ball of your feet and toes, and use the heel of your front foot to push yourself back up. Squeeze your glutes as you come back up, and you'll feel the burn in no time!
If you're going to add weight to this exercise, place the barbell behind your neck rather than across your shoulders. This will keep the weight behind you, forcing your glutes to work harder!