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4Arm Strong is a self-therapy device that creates traction on the forearm muscles toward the elbow while stretching in the opposite direction.

This type of assisted stretch can expand the fascia and lengthen the forearm flexor muscles in the anterior and posterior compartments of the forearm, as well as create a stretch in front of the elbow that otherwise couldn’t be achieved.  Anterior describes the inside or bottom of the forearm and posterior describes the top of the forearm. Expanding the fascia and stretching the forearm flexor and extensor group muscles can create more space in the forearm compartment, which allows blood to flow into the muscles with less constriction. Less constriction translates into less arm pump. It also results in a freer, less restrictive movement which almost always results in greater grip strength and freedom of movement in the hands and wrists.

Arm Pump:

  • Arm pump is simply the result of too much blood in a confined area. When certain athletes and professionals move their hand and wrist in a repetitive motion, or push and pull an object, they can experience tightness in the forearm and a loss of grip strength. Most people understand this as arm pump.
  • It is important to understand that arm pump isn’t a blood flow issue; it is a blood containment issue. Arm pump is no different than any other muscle pump caused by certain activities.
  • Many different activities can cause arm pump.  Twisting a throttle and pulling a clutch (Motorcycle sports) climbing a rock formation (rock climbers) using a tool or surgical device (surgeons, dentists, carpenters mechanics) pulling a hose (firemen) controlling an opponent (MMA, BJJ, wrestling, grappling) as well as pulling and pushing weights (Olympic weight lifting)
  • Fascia is a very stiff and constricting tissue. 4Arm Strong allows anyone to stretch and expand the fascia, allowing for blood to be increased in these muscles with less restriction.  4Arm Strong also effectively stretches the forearm muscles, which reduces their thickness, which will also decrease pressure.

Grip Strength:

  • Increasing grip strength has many benefits. Better control of a motorcycle, enhancing a rock climbers’ ability to climb, improving an MMA or Jiu Jitsu fighter’s ability to control their opponent. Unfortunately these types of athletes should avoid strengthening their grip with resistance training because this can cause the muscles in the forearm compartment to become larger, thus increasing the risk of arm pump.
  • 4Arm Strong not only increases grip strength, it actually reduces the circumference of the muscles because of the effectiveness of the stretch, so there is no risk of enlarging the forearm muscles.
  • Legendary motocross trainer, Aldon Baker believes this is one the greatest benefits of 4Arm Strong. “The value of reducing arm pump speaks for itself; the value of increasing grip strength without resistance training is monumental!”
  • Use of the 4Arm Strong results in reduced arm pump, stronger grip and better hand and wrist function. When the hands and wrists work with less tension, the entire body can function with less tension. It isn’t hard to see why trainers like Aldon Baker are so excited about this device!
  • Grip strength, or lack thereof can also be an indication of one’s cardiovascular health. 4Arm Strong, LLC has not performed any studies relating the use of 4Arm Strong to any particular individual’s cardiovascular health; however there are studies that do indicate increasing grip strength is beneficial to the cardiovascular system.

 Carpal Tunnel Symptoms:

  • Carpal Tunnel Syndrome is caused by the narrowing of the Carpal Tunnel in the wrist which puts pressure on the Median Nerve. While using the 4Arm Strong won’t expand the Carpal Tunnel, it can create a much more effective forearm stretch, which is highly recommended by physical therapists to treat Carpal Tunnel Symptoms. Stretching the forearm, specifically extending the wrist by pulling the thumb can create a Median Nerve release. Doing this stretch with the 4Arm Strong can be far more effective then stretching without it. 4Arm Strong can also create a much freer movement in the entire forearm which can result in improved hand and wrist function.

 Tennis and Golfer’s Elbow:

  • Tennis and Golfer’s Elbow is the result of overuse. The medical term for Tennis Elbow is, “Lateral Epicondylitis” which is an injury or tendonitis on the outside of the elbow. The medical term for Golfer’s Elbow is, “Medial Epicondylitis” which is an injury or tendonitis on the inside of the arm.


  • Small: 30 cms and under
  • Large: 30 cms and over

4Arm Strong Personal Therapy Device

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