(via https://www.youtube.com/watch?v=z2ADBraXLgk)

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(via https://www.youtube.com/watch?v=z2ADBraXLgk)
The clamshell exercise
The clam exercise is great for your glutes and hip stabilisers. You should feel fatigue in your glutes and sides of your hips, but this exercise should not be painful.
Teaching points
Lay on your side with the knees bent and so the feet are in a line with your back
Lift the top knee away from the bottom knee, keeping the feet in contact
Make sure your pelvis and lower back stay still
Return to the starting position
Variations & progressions
Perform with the legs straight and lift the top leg completely away from the lower leg
To make the exercise harder, lift the feet off the floor so only the bottom knee is in contact with the floor.
Thank you to sportsinjuryclinic.net