United Boxing San Diego in Chula Vista's Otay district trains competitive amateur and professional fighters at 3800 Main Street, running separate ring sessions for youth ages five and up alongside adult striking programs. The gym's USA Boxing–affiliated competition pipeline has sent fighters to national-level tournaments, building a striking pedigree on Chula Vista's south side that complements the MMA grappling focus at Teams MMA. Structured classes separate beginners from advanced competitors across evening time blocks, with morning cardio boxing sessions adding conditioning for adults who train without full-contact sparring. Coaches emphasize defensive head movement and counter-punching combinations in sparring rounds, a technique-first approach that reduces the chronic cervical compression many boxers address at Clear Chiropractic. Ring sessions run on a regulation-size canvas platform surrounded by heavy bags and speed bag stations, with fighters progressing through four-round amateur bouts before advancing to six- and eight-round professional card preparation.