Players will be notified on the days that they need to train, which is typically 2-3 times per week. Training programs typically take 6-8 weeks to complete.

Yes. Our Cruiser and Flex programs are designed to be used in-season or during busier times.

You can view the full list of programs on our Training Programs page.

In TheStack Baseball mobile app, you'll have access to training metrics for any player that shares their profile with you.

Many kids as young as 7 years old enjoy and benefit from training with The Stack System. However, age alone shouldn’t determine whether your child should start speed training. It’s important to consider the following factors:

Enjoyment- Does your child enjoy training for baseball? While TheStack Baseball is designed to make speed training engaging and fun, it’s still structured training. If your child doesn’t find it enjoyable, their time may be better spent on other activities they love. For younger kids, we discourage replacing free play or participation in other organized sports with Stack training. That said, The Stack System requires only about 45 minutes per week and can easily be incorporated before or after baseball practice, making it a manageable addition to their routine.

Training Volume- How much baseball is your child already practicing? If they only practice a few hours per week, adding 45 minutes of Stack training can be beneficial. However, if they’re already practicing for several hours daily and taking hundreds of swings each week, adding more training could increase their overall workload to an unhealthy level. In some cases, replacing some baseball training with Stack sessions can be advantageous. Proper training volume is critical in youth sports to minimize the risk of injury. TheStack Baseball is a low-volume program with loads tailored to each athlete, but it’s important to monitor your child’s total workload, including swings, to avoid overtraining.

Developmental Readiness- The Long-Term Athlete Development (LTAD) model, used by many youth sports organizations, identifies critical windows of opportunity for speed development. For girls, these windows typically occur between the ages of 6–8 and 11–13 years. For boys, the first window generally occurs between 7–9 years. During these periods, children may respond particularly well to speed-focused training.However, it’s essential to tailor training to their individual development and readiness (https://www.baseball.ca/long-term-athlete-development#7).

In summary, kids as young as 7 can benefit from The Stack System, but it’s important to assess their interest, current training volume, and developmental stage to ensure a positive and productive experience.

Head to the Stack Bat Fitting Tool page to find out whether the Pro or Youth Stack bat is the right fit.

The sensor battery is a standard CR2032 lithium coin battery that only needs to replaced about once per year. Please watch the How to Change the Stack Bat Sensor Battery video.

Lost a weight?  No problem, email us at info@thestackbaseball.com and let us know what you need.  We'll work out details with you to send a replacement.

For now, TheStack Baseball App is only available on iOS, and requires using a device that is compatible with iOS/iPadOS 15.0 or later.  

A complete list of options can be found here:

iPhone

https://support.apple.com/guide/iphone/supported-models-iphe3fa5df43/15.0/ios/15.0

iPad

https://support.apple.com/en-us/HT212789

If you are anxious to get started now, you can use TheStack Baseball App on an iPad - the large display makes for a great training experience - or acquire an older iPhone. 

Your serial number is located on the threaded stem of your Stack hardware.