TheStack Baseball

TheStack Baseball brings Dr. Sasho MacKenzie's speed research to your training with dynamic, variable inertia speed training. Precision overload and overspeed training adapt to your progress, making bat speed gains efficient and effective, backed by millions of swings from The Stack System.

The app includes your own personal speed trainer to guide workouts, track Stack weight, rest, recovery, and gains, plus seamless tracking with the Stack Sensor. Share progress with teammates, coaches, and others, and connect to stay accountable. To start speed training, you’ll need a Stack Bat.