Train a More Powerful, Repeatable Swing Across Baseball, Softball, and Golf

Build muscle memory and hand speed with every rep, one device, three sports, proven results.

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Developed by Legends to Solve the Power Problem

PX 40/40 was born from Jose Canseco’s decades-long quest for consistent power hitting. As a two-time World Series champion, Canseco saw firsthand how even elite athletes struggle to repeat their best swing under pressure. Partnering with engineers, he developed a pressure-activated extender that delivers real-time feedback and builds fast-twitch memory—then brought in Ken Griffey Jr. to endorse the movement. What started as a personal training tool became a game-changing product built for every level of play.

Real-Time Correction That Builds Power and Speed

Corrects Swing Mechanics in Real Time


Tension-based cords activate throughout your motion, guiding your arm through the optimal path. 

Builds Muscle Memory & Speed

Creates resistance and acceleration that develop fast-twitch reflexes and hand speed.

Improves Consistency Across Sports

Train for baseball, softball, or golf—one device, three disciplines.

Protects the Elbow & Arm

Designed for safety, even during high-velocity swings.

Everything You Need to Start Training

Each PX 40/40 kit comes with

Designed for Athletes at Every Level

PX 40/40 is built for:

  • Youth athletes developing good habits early
  • Amateurs looking for consistency and confidence
  • Pros fine-tuning swing mechanics
  • Coaches & academies upgrading their training toolkit

Fixes Inconsistent Swings with Muscle Memory Training

Athletes at every level struggle to replicate their best swing.



PX 40/40 solves that by delivering real-time resistance and correction, training your body to fire the same way—every time. More power. More confidence. Less guesswork.

What the Pros Are Saying

“PX 40/40 is a game-changer. It's not just a training aid; it's a pathway to unlocking your full potential on the field or the course. Whether you're a seasoned pro or just starting out, PX 40/40 has something to offer everyone.”
— Ken Griffey Jr.

“The PX4040 isn’t just a training tool—it’s a revolution in the art of power hitting. It teaches you timing, torque, and technique—the same elements that made me one of the most feared hitters in the game.”
— Jose Canseco, 2x World Series Champion & 6x All-Star

Get An Exclusive Discount

We're Launching Soon. Get an exclusive discount by signing up now!