Get fitter, stronger and more confident with adult kickboxing classes designed for every level. Complete beginners are always welcome — come train in a friendly, no-ego environment under world-class coaching.

Worried you're too unfit, too old, or too uncoordinated to start? You're not. The vast majority of our adult members had never trained before walking through the door. Here's exactly what your first four weeks look like.
Just turn up. No gear, no experience, no pressure — we'll lend you everything you need. Come and see if Diamond is the right fit for you.
We start at the very beginning: stance, guard, footwork and your first basic combinations. Nothing is assumed, nothing is rushed.
Apply what you've learned on the pads and in controlled partner drills. Technique starts to feel natural, and your fitness builds fast.
As you grow in confidence we layer in targeted conditioning — strength, core and cardio circuits that build real, functional fitness at your pace.
Adult kickboxing delivers far more than a workout. These are the changes you can expect — physically and mentally — when you train consistently with us.
Never thrown a punch in your life? Perfect. Our adult classes are built around real people starting from day one — no fitness level or experience required, just a willingness to give it a go.
Build genuine, functional strength and conditioning. Every class improves your cardiovascular fitness, core stability, mobility and stamina — the kind of fitness that shows up in everyday life.
Kickboxing is one of the highest calorie-burning workouts you can do. Consistent training, combined with a sensible lifestyle, is a powerful, sustainable way to manage your weight — and it's far more fun than the treadmill.
There's nothing quite like hitting the pads to clear your head. Training forces you to be fully present, and the endorphin rush you leave with is one of the best natural stress relievers there is.
Learn practical, proven self-defence skills that build genuine, quietly-earned confidence. You'll know how to move, how to strike, and crucially, how to stay calm under pressure.
Every new technique mastered is a win. Watch your confidence grow — on the mat first, then quietly in the office, in social situations, and in every other corner of your life.
Every hour-long adult session is structured the same way — balanced, purposeful and scaled to your level. You'll always know where you are and what comes next.
Mobility, light cardio and movement prep to get you ready to train.
New skills broken down step by step — combinations, footwork and defence.
High-energy rounds on the pads and with partners to embed technique under work.
Functional strength, core and cardio circuits tailored to your level.
Stretch and gradual recovery — you'll leave loose, relaxed and refreshed.

Your adult classes are led by Head Coach Sam Welch — a 5th Degree Black Belt with 22 years of competitive experience across kickboxing, Brazilian Jiu Jitsu and MMA. In BJJ he's a National, European and London Open Champion, with 15 years in BJJ and 10 years in MMA. He doesn't teach from textbooks; he teaches from two decades of lived, elite-level competition.
Searching for adult kickboxing in Northwood, kickboxing classes for beginners, or a fitness kickboxing session that actually keeps you coming back? Diamond Kickboxing runs dedicated adult classes at Holy Trinity Church of England Primary School in Northwood, welcoming everyone from complete first-timers to experienced martial artists.
Our adult programme is built around real people with real lives. Whether your goal is to lose weight, get fit, learn self-defence, manage stress or simply try something new, you'll be trained step by step under Head Coach Sam Welch — a 5th Degree Black Belt with 22 years of competitive experience across kickboxing, Brazilian Jiu Jitsu and MMA — a National, European and London Open BJJ Champion with 15 years in BJJ and 10 years in MMA. Every session blends technique, pad work and conditioning, so you build genuine skill alongside real, functional fitness.
Beginners are welcome at every class — no fitness level or experience is required to start, all equipment is provided, and you'll always train at your own pace in a friendly, no-ego environment. With members joining us from Northwood, Northwood Hills, Pinner, Eastcote, Ruislip, Ickenham, Hatch End, Rickmansworth and Watford, there's a Diamond adult class close to you. Book your free trial today.
Completely free, no commitment, no pressure — just turn up and give it a go.
Find your nearest venue, see the weekly timetable, or book your free trial in minutes.
Ready to become the best version of yourself? Step through the door and experience what real coaching feels like — we guarantee it'll be the best decision you make today.
Beginner friendly · All ages welcome · Join 130+ students