There is A LOT of hip flexion and extension in yoga asana and in life. Sometimes, we can lose it. Some reasons for losing it are: habit, posture and injury (old or new) (foot, ankle or anywhere else really).
Here is a mini functional asana sequence we came up with to increase awareness and efficient movement around the hip and pelvis. It focuses on dissociating the ball and socket movement from the movement of the pelvis. Meaning, can you stabilize the pelvis (or hemi pelvis in this instance) so that you can get pure juicy hip flexion and extension within the hip (femoracetabular joint)?. Because pure juicy hip flexion and extension IS SO IMPORTANT for power, efficient movement, & protection of joints up and down the chain.