The donkey kick is a bent-knee hip extension from all fours. Keep the hips square and the kick will find the glute instead of the lower back.

Diagrams show the shape of the movement. Follow the written steps before you add load.
Equipment. Bodyweight, Mat
Muscles. gluteus maximus. Also core, hamstrings
All Cheeked Up publishes general fitness education. It is not medical advice, physical therapy, or a promise that your body will change. Stop any exercise that causes pain and talk with a qualified professional about injuries, pregnancy, or health conditions before you train.