The Full-Body Resistance Band That Builds Speed When Training Harder Can't.

It's built not to. Your hands are free and you throw the same shadowboxing, bag and pad work you already do; the band adds resistance through the whole movement. Start with controlled rounds, then build the pace. Customers say it helps their form: "It improves ur technique you go way faster even after the first time" (Julian R.).

There's no dead weight hanging off your wrists or ankles the way there is with ankle weights or weighted gloves. The resistance comes from cords running from your wrists and ankles to the belt. Start with controlled reps, and if you're carrying an injury, check with your doctor or coach first. One customer put it this way: "Applies resistance at no cost to joint health." (Mohammad M.)

It's on sale right now for less than a single personal-training session, and it comes with two speed e-books worth $42, free. Compare that with roughly $400 for dumbbells, ankle weights and weighted gloves. And you have 30 days to try it: if you don't notice faster, sharper punches, we'll refund you in full.

Most people feel it the first time they take it off: 79 of 277 reviews mention their hands feeling lighter and faster. For lasting speed, most users report noticeably faster punches within 2–3 weeks of consistent training (3–4 sessions a week).

We get it. It looks unusual the first time you see it. It's a waist belt with wrist and ankle bands, and that's what lets it load your punches and kicks at the same time. It's the band Joshua trained in on the way to 453 punches in 60 seconds, and Michael "Venom" Page uses his in his warm-ups: "Even today… I was using it… a lot in my warmups." Most people wear it at home or in the gym anyway.

No. Wear it for the rounds you choose (shadowboxing, bag, pads), 3–4 sessions a week, then take it off. That last part matters: taking it off is when you feel the speed.

Genes play a part. Scientists have found a "speed gene" (GALNT13) linked to more fast-twitch fibre, and explosive power is estimated to be around 70% heritable. But Joshua had decent genetics and just-above-average speed. Plyometrics, dumbbells and training harder didn't move it. One change, training his punches against resistance in the Ji Band, took him from 240 to 453 punches in 60 seconds (+89%) with no extra training time.

Generic bands are designed for gym exercises. Dumbbells load your arms straight down and only your arms, ankle weights only load your legs, and you can't throw real shots while gripping a weight. The Ji Band is one hands-free harness for punches and kicks, made for martial-arts movement by the world's fastest puncher.

It fits heights from 5'5" to 6'5" and waists up to 38". Not sure? Email support@jimartialarts.com before you order.

Email support@jimartialarts.com and we'll sort it out. Standard delivery is 3–8 business days (location dependent), and you're covered by our 30-day money-back guarantee.