chiropractic adjustment (also known as chiropractic spinal
manipulation) has many very incredible and powerful results. One such
documented result is an immediate increase in muscle strength.
Researchers again documented an increase in skeletal muscle strength
immediately following a chiropractic adjustment to the spine. When
ten subjects received a chiropractic adjustment to their sacroiliac
joint, researchers noted a significant improvement in their quadriceps
muscle strength. The sacroiliac or SI joint is the joint formed between the tailbone (sacrum) and the large pelvic bone (ilium).
Source: JMPT. Volume 29, Issue 2; February 2006.