With our enhanced stretch forearm device, you can improve grip strength, treat forearm and elbow pain, increase flexibility and durability, and prevent arm pump! 4Arm Strong comes with a 30-day money back guarantee!

  • Great for any athlete who uses their arms
  • Easy to use
  • Fits easily in your gym bag
  • Durable and made to last

At 4ARM STRONG, we wanted to help athletes of all types find a better way to improve forearm flexibility and function, relieve elbow pain, Carpal Tunnel Symptoms, reduce the risk of elbow injuries and also avoid performance killing arm pump. Arm pump happens when too much blood gathers in the forearm, which can cause you to lose grip strength. The 4ARM STRONG is designed to help you enjoy freer, less restrictive movement while you’re training or competing.


  • Weight: 0.65 lbs
  • Dimensions: 8 x 10 x 10 cm
  • Transparent injection-molded thermoplastic polymers
  • Delrin® high-performance acetal resin
  • Lightweight medical grade 6061 aluminum
  • Velcro fastening system.
  • Sizing: Measure your forearm at its widest point

Sizing based on your forearm size in inches:

Less than 11" = SMALL
11"-13" = LARGE

Xtra Lager = For forearms greater than 13" make sure to pick up a LARGE device AND the supplementary XTRA LARGE strap.


Order yours today!

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Customer Reviews

Based on 64 reviews
Mai più indurimento avambracci

Un innovativo sistema che permette di non far indurire i bracci facile da usare e di ottima qualità

Good so far!

So far ive had very fast recovery times and my forearm pump is wayy less compared to what it was!

Feeling Progress

After receiving my 4Arm Strong Device I was happy to find out the fit guide was spot on. It was very easy to use following the instructions and the online videos. I have been using it for the past 2 weeks and I feel that it has been effective. I am going riding this week and I am looking forward to feeling the improvement.

Major improvements to my debilitating armpump..

I normally suffer from armpump so bad during a race that I have no choice but to pull over and wait for it to go away, even after that I still have very limited forearm strength. After using 4arm strong for the first race this season I can honestly say that it has nearly completely eliminated armpump for me. Your arms will still obviously get sore from riding but it is much more manageable with the help of this device.

Motocross review

This product is truly amazing. I can’t thank 4 arm strong enough for sponsorship help and a great product. Within two times of using it the results have shown. I went from second to third place finishes to winning my first race.