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Catskills Studio 6045 Main Street, Tannersville
longitudinal observational study direct bjj and mma Brazilian Jiu-Jitsu and mixed martial arts

Modern unexplored martial arts – what can mixed martial arts and Brazilian Jiu-Jitsu do for youth development?

Authors Tony Blomqvist Mickelsson
Publication Published online 2019; journal publication 2020
Evidence Audit Verified 2026-10-08 · Next Review: 2027-10-08
Academic Verification

Study Summary & Academic Scope

Sport & Domain

Brazilian Jiu-Jitsu and mixed martial arts

Population Covered

ages 15–24; 113 participants.

What Was Studied (Intervention)

Participants self-selected Brazilian Jiu-Jitsu or mixed martial arts; sport was not randomly assigned.

What It Measured

Self-control, prosocial behavior, and aggression before and after participation.

What the Source Reports (Key Findings)

Both groups reported increased self-control and prosocial behavior. Aggression-score directions differed, and the MMA group began with higher aggression scores.

What It Does Not Show (Limits & Boundaries)

Whether sport caused the changes, every youth participant, or Sensei Sandy BJJ classes.

Verification Protocol

Verified 2026-10-08 · review again 2027-10-08.