Rolling In & Out
Plane of Motion
Sagittal & Transverse
Muscle Focus
Spring Setting
Light / Medium
Roll Up Bar Short Springs
Top Hooks
Spinal Flexors
Recs Atubdominis, Internal Oblique, External Oblique

Spinal Extensors
Erector Spinae, Semispinalis, Deep Posterior Spinal Group

Shoulder Flexors
Anterior Deltoid, Pectoralis Major, Coracobrachialis, Biceps Brachi

Shoulder Extensors
Latissimus Dorsi, Teres Major, Posterior Deltoid, Triceps Brachii

Scapular Depressors
Lower Trapezius, Serratus Anterior, Latissimus Dorsi, Pectoralis Minor

Scapular Adductors
Trapezius, Rhomboids, Levator Scapulae, Latissimus Dorsi (when arms are forward)

Hip Extensors
Gluteus Maximus, Hamstrings: Semimembranosus, Semitendinosus & Biceps Femoris

Other Muscles at Play
Objectives
Mobilizes the full spine— including the cervical region— through controlled flexion and extension.
Strengthens the rhomboids and midback to support steady scapular positioning.
Develops strong abdominal anchoring to control the movement from start to finish.
Provides a targeted stretch to the anterior tibialis when that muscle is shortened.
Focus on breathing to synchronize the movement.