Physics Does Not Care About Your Swing Thoughts.
The golf swing is a violent, asymmetrical ballistic movement lasting approximately 1.2 seconds. It subjects the lumbar spine to compressive forces up to 8 times body weight.
The Joint-by-Joint Approach
Physical therapist Gray Cook and strength coach Mike Boyle popularized the "Joint-by-Joint Approach," which dictates that the body is a stack of joints alternating between a need for mobility and stability.
- Ankles: Need Mobility
- Knees: Need Stability
- Hips: Need Mobility
- Lumbar Spine (Lower Back): Needs Stability
- Thoracic Spine (Upper Back): Needs Mobility
When a mobile joint (like the hips) becomes stiff from sitting, the body forces the adjacent stable joint (the lower back) to become mobile to make up the difference. This is the exact mechanism for 90% of golf-related lower back pain.
The Role of the Central Nervous System
Tightness is often a neurological defense mechanism. If you lack strength in your glutes to control deep hip flexion, your brain will physically tighten your hamstrings to prevent you from going into a range you cannot control. Stretching the hamstrings without strengthening the glutes is a temporary and useless fix.