HEAVY-BALL PRO
400g Tennis Training Racquet for Improving Swing Speed
The Accelerator is a 400g tennis training racket developed to improve players' swing speed .
The racket's weight and design, which differ from standard rackets, allow players to train while improving their awareness of body mechanics, acceleration, timing, and contact point during the swing.
It's not just about making it heavy, but about developing the feel to swing it faster, more efficiently, and more sharply.
That's the value of an accelerator.
By continuing to use it, you will become more aware of the ease of swinging, maneuverability, and acceleration when you switch back to a regular racket, which will lead to an improvement in the quality of your shots in actual matches.
Features of the Accelerator
The Accelerator , with its unique design that differs from conventional racquets, provides a new stimulus to the player's swing. Weight, balance, and face size - everything is designed not just for hitting the ball, but to create a better swing.
Improving swing speed
By stimulating the brain to cope with heavy resistance, a normal racquet swing will feel surprisingly fast and light.
Improve endurance in matches
By learning the necessary body mechanics during an actual swing, you can more easily maintain high performance even in demanding matches.
Correct technical flaws
Because it reveals flaws in your form and inconsistencies in your stroke, it provides an excellent opportunity to improve your technique and develop a better swing.
To improve the accuracy of shots
The small 50-square-inch face size enhances accuracy and helps develop hand-eye coordination.
Increase the power of your shots
Mastering the movement of accelerating properly towards the ball will lead to more spin and more powerful shots during matches.
Recommended for people like you!
Accelerators are being utilized by players at various levels and positions.
For competitive junior athletes
For players aiming for stronger shots, a more stable swing, and greater consistency.
For general and advanced players
For those who want to review their form, or improve the power and quality of their hits.
To the coach
For developing feel in lessons, providing swing instruction, and creating differentiated lesson plans.
To Academy, Club
We can offer unique value through our training programs and merchandise.
How to utilize the Accelerator
The purpose of using an Accelerator is not simply to use it.
The goal is to give players the necessary challenges and bring out the best in their play.
For example, it can be used in the following situations:
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Focus on swing acceleration during warm-ups before practice/games.
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Switching from a regular racquet improves the feeling of swinging.
- He practices his swing during court changes in the match to prepare for the next game.
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During ball-feeding practice, you actually hit the balls, and then switch to a regular racquet to check the effect.
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Used as a problem-setting tool in coaching settings.
Even short periods of consistent effort can lead to cumulative changes.
Even short sessions of 5, 10, or 15 minutes, when done consistently, can help you notice changes in how you use your body and your swing feel.
The Accelerator helps players continuously improve their senses and playing style.
User feedback
"After using it during warm-up, my regular racket felt much easier to swing."
- Japan's top junior player
"It has improved my focus on the point of contact and has been very helpful in developing my awareness of my swing."
- Japan's top veteran player
"Introducing it in lessons makes it easier to explain to students and helps them understand the difference in perception."
- Coach in charge of strengthening/development
* Accelerators are used in a variety of settings, including by competitive athletes, amateur players, coaches, and academies.
Frequently Asked Questions
Can beginners use it?
Yes, beginners can use it.
However, since the Accelerator is a training device that applies a different kind of load than a regular racquet, we recommend starting with short sessions to avoid overexertion.
For beginners in particular, rather than using it for long periods, incorporating it into your warm-up or as part of building muscle memory will help you improve your awareness of your swing and focus on the point of contact.
Please use it gradually while maintaining proper form and being mindful of the physical strain on your body.
Can junior players use it?
Yes, junior players can use it as well.
However, we recommend adjusting the duration and frequency of use based on the player’s age, physique, muscle strength, and playing experience.
Since the Accelerator is heavier than a standard racquet, we recommend starting with short sessions under the supervision of a coach or parent, rather than using it for long periods right from the start.
When used properly, it can help improve swing speed, swing feel, awareness of the point of contact, and shot consistency.
How long should I use it each time?
As a general guideline, we recommend starting with short sessions of about 5 to 10 minutes per session.
The Accelerator is a training tool capable of providing high-quality stimulation even during short sessions,
but once you no longer feel the weight as a burden, you can gradually increase the duration of use.
You can use it efficiently by incorporating it into your warm-up, swing checks, or stroke practice,
and it’s also highly effective as preparation for the next game - such as during court changes in a match.
How is it different from a regular racquet?
Unlike a standard racquet, the Accelerator is a training-specific racquet designed to improve swing speed, enhance awareness of the point of contact, and optimize body mechanics.
It is heavier than a standard racquet and features a smaller head size,
so it is designed to demand:
・More efficient swing mechanics
・Greater precision in identifying the point of contact
・Higher levels of concentration
As a result, you’ll likely notice a difference in ease of follow-through and maneuverability when you switch back to a standard racquet.
Is wholesale purchasing available?
At this time, we do not offer wholesale purchases; however, we are open to discussions with corporate and organizational customers, such as coaches, academies, clubs, and shops.
We will evaluate whether we can provide a proposal based on the quantity to be introduced, sales format, desired region, and intended use.
At Heavy-Ball Pro, we are committed to supporting our partners in every aspect, including on-site implementation and sales expansion.
The Accelerator is more than just a product; it has the potential to transform the learning environment for players.
If you are interested in implementing the Accelerator or establishing a partnership, please feel free to contact us.