LUNGES
How to do it?
Lunges can be done with no weights, with dumbbells or with barbell.
First stand with feet shoulder-width apart. Step forward with your heel landing first on the ground. Continue the motion until the other legs knee is nearly touching the ground. Your knee should exactly be at 90 degrees angle and not over your toes. Then return to your starting position by using your front leg. Now you have done one repetition.
When doing this with weights, keep the barbell on your upperback/ shoulders and if you use the dumbbells keep them on your side one dumbbell in both hands. There are also other variations of the lunge. One is walking lunge, where you continue from the down position forward and do second lunge with the other leg, like you were walking.
What it targets?
The main muscles are the quadriceps muscles, gluteal muscles and hamstrings.
Tips for shaping butt
Start easy with no weights so you that you get the "idea" how it's done, there you can add weights as much as you like.