Headstrong Boxing Gym is home to several trainers to accommodate your needs and add variety to your boxing workout.

Nate Campbell, WBA, IBF and WBO lightweight champion

nate-campbellGet trained by a world champ! Nate Campbell visits Headstrong regularly and trains up and coming pros. He’s always scouting new talent.

Jack, Boxer & Trainer

Trainer Jack doing his thing!

Jack is a seasoned competing amateur boxer who offers one on one training for beginner to intermediate level boxers. He offers both boxing and fitness instruction.  904-713-3760

Julia Mullens, Boxer & Trainer

Julia Mullens and a Boxing Bunny member sparring. April 2012.

Julia offers introductory level boxing instruction and fitness training for women. Contact her at

Don Roberts, Boxer, Coach & Trainer

DonDon provides boxing instruction and coaching for all levels of boxers. His experience spans both martial arts and boxing, with several championships and awards. With 120 amateur and sub-amateur boxing matches, 6 championships and 10 professional matches. To schedule your sessions with Don, email him at or text him at: 904-655-1042

Mike Diamant, M.D., Boxer & Trainer

Mike offers appointment only based training:

  • One on one boxing instruction
  • Endurance cross training
  • Weight training
  • Power conditioning

Contact Mike to schedule a training session at 904-891-3945