randomized controlled trial
direct bjj
Brazilian Jiu-Jitsu
Effects of a school-based Brazilian jiu-jitsu programme on mental health and classroom behaviour of children from Abu Dhabi: a randomised trial
Academic Verification
Study Summary & Academic Scope
Sport & Domain
Brazilian Jiu-Jitsu
Population Covered
sixth-grade boys; 88 enrolled; 80 analyzed.
What Was Studied (Intervention)
Brazilian Jiu-Jitsu compared with regular physical education; 12 weeks; 2 times each week.
What It Measured
Teacher-rated behavioral outcomes in one Abu Dhabi school program.
What the Source Reports (Key Findings)
Teacher-rated emotional symptoms (p=.007), hyperactivity and inattention (p<.001), total difficulties (p=.002), and externalizing behavior (p=.001, η²=.07) differed on selected measures.
Selected detailed results: The reported values were p=.007 for emotional symptoms, p<.001 for hyperactivity/inattention, p=.002 for total difficulties, and p=.001 with η²=.07 for externalizing behavior.
What It Does Not Show (Limits & Boundaries)
ADHD treatment, every child, or Sensei Sandy BJJ classes. Results do not promise an individual outcome.
Verification Protocol
Verified 2026-10-08 · review again 2027-10-08.