About the Gym
Jimmy's Gym has a distinct identity in Utrecht: a raw, authentic old-school boxing gym, the kind of place where the walls carry posters of legends like Ali and Frazier and the warm-up runs to soul and funk. Members describe it warmly and repeatedly as a place with no arrogance and no nonsense, where beginners are genuinely looked after and the group energy is high. Boxing is the heart of it, described by the gym as the most honest sport there is, but the offer is broad.
Alongside boxing, the gym runs Thai kickboxing under Walter Janssen, a 5th Dan black belt and A-level kickboxing trainer; MMA and grappling sessions under UFC-based rules; CrossFit-style strength and conditioning; and private one-on-one coaching. There are also group clinics for teams and companies. Pricing is straightforward and affordable, from an unlimited monthly pass down to once-a-week and youth options, with a free trial lesson available. One cautionary note appears in reviews about an auto-renewing membership, so it's worth checking the contract terms, but on the training itself, the verdict is overwhelmingly positive.
Class Schedule
Contact gym for current schedule
Pricing
Trial Class
One-time
Unlimited
All classes
10-Class Pack
Valid 3 months
Head Coach
Walter Janssen
Walter Janssen leads the Thai kickboxing programme at Jimmy's Gym as a 5th Dan black belt, A-level kickboxing trainer and former international referee, with decades of experience teaching men, women and youth for fitness, discipline and competition.