A prone, global back-extension pattern that integrates thoracic extension, glute-ham co-contraction, and scapular organization while the pelvis stays heavy and quiet. Think of it as a cousin to Swan/Dart, skewed toward a long-lever isometric hold rather than a press-up.
Both drills are prone posterior-chain exercises. One Leg Kick emphasizes hamstring curl + hip extension on a Sphinx/forearm support with thoracic lift. Double Leg...
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