Chronic-pain corrective-exercise studio whose Pain-Free Movement Specialist curriculum was adopted by the American Council on Exercise as a certification track, Function First runs out of 3425 Fifth Avenue Unit 4 in 92103. Initial intakes run two hours and open with a seated, standing, and supine biomechanical assessment that maps pain drivers across the kinetic chain, a depth of movement analysis closer to the functional-neurology screening done at Inner Balance Institute than to a standard personal-training consult. Programming leans on the biopsychosocial pain model, integrating nervous-system cueing and load management for clients whose pain has outlasted traditional orthopedic treatment. The veteran-owned studio has consulted for the Los Angeles Chargers and developed the Core-Tex reactive training device used by pro teams and universities. The non-manipulative, motor-control-focused approach places Function First in the same movement-reeducation lineage as the somatic retraining delivered at Feldenkrais San Diego. Most complex cases are multi-visit programs for clients with five or more years of chronic pain who have cycled through injections, surgical consults, or failed conservative care without lasting resolution.