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 88 reviews
Mickael Argaillot
La perfection

La perfection site avec des personnes opérationnels qui réponds très rapidement produit reçu en bonne et du forme Confort pour le article.
Pour moi vous pouvez avoir toute confiance

Product works as advertised

My son had forearm tightness (arm pump) in baseball when throwing. After using the 4Arm Strong device before practices
and games, he has not complained of any symptoms at all afterwards. At first he didn't think it worked because when he first used it he was expecting a definite "feeling" that he wasn't getting (I think he was expecting it to somehow stretch the area for him..) but now realizes the benefit of the device through the outcome of an arm that feels pain free after activity. Thank you for developing this product!

Yan Jansen
Elbow pain relief

Elbow pain from tendinitis--tennis or golf or motocross or construction or rock climbing or cowboying? I do all that too & this thing works! Fast to I found. A bit awkward at first but no big thing. Follow directions & videos once, even twice a day for 5-10 minutes & guaranteed you'll get results too in under a week, two max. It works.

Robert Narramore
Lost in the mail?

I have not received the item still waiting

Robert Meierdiercks
Great forearm exercises

Decreases forearm pump as it says it does.
Easy to use.