Lie on one side, both knees bend to 90 degrees and arms relaxed. Maintain chin tuck, blades set and core set. Breathe out, lift the top leg towards the ceiling keeping the knee bend. Breathe in, lower the leg back to starting position. Repeat.
ars.els-cdn.com/content/image/1-s2.0-S105064111730
Exercises - Performance Health Academy
Hip abduction exercises to help strengthen muscles
Hip Flexion Side-Lying
7 Hip Abductor Exercises to Work the Small Glute Muscles in Your Butt
Maximum voluntary isometric contraction of hip abduction in neutral in
How To: Side-Lying Hip Abductions - Monster Longe
Goniometric measurement of side lying hip extension.
Best Exercises After Total Hip Replacement Surgery - E3 Rehab