Legs to Base-Line connection rectus femoris gluteus maximus

Gluteus maximus & rectus femoris muscles support the legs through a full range of movement connected to Base-Line. Rectus femoris aligns the hip & knee joints.

The Five Main Muscles for a Full Range of Natural Movement, Dynamic Alignment & Balance. - LessWrong 2.0 viewer

Gluteus Maximus - Physiopedia

Gluteus Maximus Muscle - an overview

Gluteus maximus - Origin, insertion and actions

Biarticular muscles are most responsive to upper-body pitch perturbations in human standing

Tips for Turnout – Isolating Your True Turnout – The Ballet Blog

Pelvic Girdle Pain - muscle energy techniques

Upper leg EMG activation during walking.Vastus Lateralis (VL), Rectus

EMG patterns of 16 trunk, pelvis and leg muscles during the foot

Rectus Femoris - Physiopedia