A posture headache, often called a cervicogenic headache, is head pain caused by muscle tension and joint strain in the neck, most often from forward head posture and rounded shoulders.
A weak core is a lack of strength and endurance in the deep stabilizing muscles of the trunk, which forces the lower back to absorb load it was not built to carry, often showing up as recurring, non-specific back pain.
Stretching for back pain loosens tight muscles for short-term relief, while core strengthening builds the deep-muscle stability that produces lasting relief, which means the two solve different halves of the same problem.
Adjacent segment stress is the added movement demand placed on the spinal segments directly above and below a fusion, since the fused level itself can no longer move, that movement has to happen somewhere.
Thoracic mobility for rotational athletes is the mid-back's capacity to rotate independently of the hips and lower back, providing the range needed for a full, powerful swing, serve, or throw.
