Side Lying Wide Opener

Side Lying Wide Opener Exercise Description

The Side Lying Wide Opener is a bodyweight mobility drill that promotes thoracic spine rotation and opens the front of the shoulder and chest. Performed on your side with the hips and knees stacked, you “open” the top arm in a wide arc, encouraging movement through the mid‑back while limiting motion from the low back. Primary tissues targeted include the pectoralis major/minor and anterior deltoid in a horizontal abduction stretch, with the thoracic extensors and obliques guiding controlled rotation. It’s useful for improving shoulder girdle mobility and ribcage excursion while maintaining a neutral lumbar spine. The emphasis is smooth rotation, relaxed breathing, and keeping the pelvis quiet so the motion occurs where intended—the thoracic spine and scapulothoracic interface.

Muscle Groups: Chest, Pecs
Target Muscles: Pectoralis Major - Sternal Head
Assisting Muscles: Deltoid - Anterior, Pectoralis Minor
Stabilizing Muscles: External Obliques, Iliocostalis, Internal Obliques, Longissimus
Body Area: Upper Body
Body Parts: Chest
Body Surface: Front
Body Symmetry: Unilateral
Equipment: Bodyweight
Exercise Patterns: Other
Exercise Type: Stretching
Functional Grouping: Horizontal Shoulder Adduction
Joint Involvement: Multi-joint
Muscle Location: Mid Chest
Movement Direction: Rotational
Muscle Position: Anterior
Gender: Male

How To Do The Side Lying Wide Opener Exercise

‘- Lie on your side with head supported; hips and knees bent ~90°, knees, ankles, and hips stacked.
– Extend both arms forward at shoulder height, palms together, shoulders stacked and relaxed away from ears.
– Lightly brace the trunk; keep the top knee anchored to the floor or a pillow to minimize lumbar rotation.
– Inhale; as you exhale, sweep the top arm in a wide arc backward, rotating through the mid‑back. Let your eyes follow your hand.
– Aim to place the back of the top hand and forearm toward the floor without forcing the range; keep ribs down and pelvis still.
– Keep the shoulder blade gliding back and down—avoid shrugging—and maintain a long neck.
– Breathe calmly at end range, feeling expansion through the chest and lateral ribcage.
– Return the arm along the same arc to the start position under control.
– Switch sides to train both directions with the same setup and cues.

Side Lying Wide Opener Tips

‘- Stack hips, knees, and ankles with hips and knees bent about 90° before you start.
– Keep both arms extended forward at shoulder height with palms together and shoulders relaxed away from your ears.
– Lightly brace your trunk and keep the top knee anchored to the floor or a pillow to minimize lumbar rotation.
– As you sweep the top arm in a wide arc, focus on rotating through the mid‑back while keeping the pelvis quiet.
– Let your eyes follow your top hand to encourage smooth, coordinated rotation.
– Aim the back of the top hand and forearm toward the floor without forcing the range.
– Keep your ribs down and your pelvis still to maintain a neutral lumbar spine.
– Allow the shoulder blade to glide back and down as the arm opens, avoiding any shrugging.
– Maintain a long neck throughout the movement.
– At end range, breathe calmly and feel expansion through the chest and lateral ribcage before returning the arm under control.

Side Lying Wide Opener Beginner Introduction

The Side Lying Wide Opener is a gentle, bodyweight mobility exercise centered on smooth upper‑body rotation and relaxed breathing. It takes place on the floor in a side‑lying position, with the legs bent and layered, and both arms initially reaching forward. From there, the top arm travels in a broad sweep behind the body, inviting movement through the mid‑back while the lower back and pelvis stay quiet and steady.

This flowing arc creates a stretching sensation through the chest, front of the shoulder, and the front of the upper body, while the upper back, core, and side abs guide the rotation. The shoulder blade glides along the ribcage rather than lifting toward the ear, which highlights control around the shoulder girdle. Calm, steady breaths at the farthest comfortable point of the motion encourage expansion through the chest and sides of the ribs. Overall, this drill offers a controlled way to explore rotation through the mid‑back, support shoulder mobility, and coordinate breathing with movement.