New Standard In Arm Support

More support than a sleeve. More mobility than a brace.
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2x ABCA AWARD WINNER
VALIDATED BY SCIENTIFIC RESEARCH
MULTI-PATENTED TECHNOLOGY
RECOMMENDED BY DOCTORS
WORN BY THE PROS
PROVEN TO REDUCE ARM STRESS
MAXIMIZE PERFORMANCE
SUPPORT RECOVERY
WORN IN ALL LEVELS OF BASEBALL
DYNAMIC ARM STABILIZATION
2x ABCA AWARD WINNER
VALIDATED BY SCIENTIFIC RESEARCH
MULTI-PATENTED TECHNOLOGY
RECOMMENDED BY DOCTORS
WORN BY THE PROS
PROVEN TO REDUCE ARM STRESS
MAXIMIZE PERFORMANCE
SUPPORT RECOVERY
WORN IN ALL LEVELS OF BASEBALL
DYNAMIC ARM STABILIZATION

Scientifically validated to reduce dynamic arm stress

REVOLUTIONARY ARM SUPPORT

The Kinetic Arm is the world's first dynamic arm stabilizer designed to support both the shoulder and elbow—and scientifically validated to reduce dynamic arm stress without restricting movement.

By providing dynamic dual-joint support during pitching, throwing, and swinging, Kinetic Arm helps athletes manage the demands of repetitive play while maintaining the natural movement required for performance.

Scientifically Validated

Doctor Recommended

Multi-Patented Technology

Trusted by 100k+ Athletes

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MOTION-RESPONSIVE SUPPORT

The Kinetic Arm delivers dynamic support designed to stabilize the shoulder and elbow during high-demand arm movement. Powered by multi-patented MuscleWeb® technology, it helps manage arm stress while maintaining natural range of motion during throwing and swinging.

A strategic network of polymer tension bands activates during high-stress phases of motion, providing external support to the arm when it’s needed most—helping manage mechanical load without restricting performance.

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ZERO RESTRICTION

ACTIVATED SUPPORT

Recommended by Medical Professionals

Orthopedic surgeons, sports medicine specialists, and physical therapists share their experiences with Kinetic Arm.

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This product exceeded my expectations! The quality is outstanding and it has made a real difference.

Dr. Lawrence Lemak

Dr. Lawrence Lemak

"The data shows that the Kinetic Arm could definitely have an impact in reducing overuse injuries."

"The Kinetic Arm has been instrumental in my rehab protocol for Ulnar Collateral Ligament reconstructions. We have also had great success in unloading our pitchers - its a new frontier!”

Dr. Rick Lehman

Dr. Rick Lehman

Orthopedic Surgeon & Medical Director at U.S. Center for Sports Medicine.

"The Kinetic Arm definitely shows promising uses for not only rehab professionals but also for performance coaches. I foresee that this prototype can usher in a new era of health and performance for throwing and swinging athletes."

Dr. Ryan Balmes

Dr. Ryan Balmes

 Board Certified clinical specialist in orthopedics and sports physical therapy.

"Excellent Product. In my line of work I am blessed to treat all levels of baseball players both after an injury for rehabilitation purposes along with healthy athletes in order to promote improved performance and injury prevention. I have searched high and low for good adjuncts to care to get my athletes back on the field as quickly and safely as possible and have finally found an awesome product to aid in injury prevention. Not to mention one that finally has some research popping up to back it. The Kinetic arm has been a game changer in my care plans for players returning from surgery or injury along with the athletes who are experiencing medial elbow discomfort with valgus stress or shoulder problems. I highly recommend this product!"

Dr. Alex Beebe

Dr. Alex Beebe

PT, DPT, OCS, CSVS, CMT

"I have been a Physical Therapist for over 20 years. I worked with a shoulder specialist, have been OCS certified since 2010, am a Champion Performance Specialist, and am a Certified Arm Care Specialist. More importantly, I am a father whose son plays high school and travel baseball. My son had an arm issue. We have used the kinetic arm (K1 initially) and now the K2 for essentially every throw he has made for the last 2 years. He wears it under his jersey during the games and at every practice. It has been a game changer for my son and essentially all my patients in the last 2 years that have had arm issues."

Dr. Shannon Loy

Dr. Shannon Loy

 PT, MPT, Cert. DN - Clinical Director Advance Rehabilitation

"As an orthopedic physical therapist, I really like this product for not only recovery from elbow and shoulder injuries, but also in helping to reduce said injuries in the first place. I have suggested this to numerous baseball and volleyball players who love its results! Fantastic product and I’m glad you guys took the time to think about how to make something like this because it’s definitely making a difference."

Dr. Joseph McCaleb

Dr. Joseph McCaleb

DaVinci Physical Therapy, of Lamar

Clinicians that recommend using the Kinetic Arm will get their athletes back into play sooner and reduce the risk of re-injury. I highly recommend using this as an easy solution for injury prevention.

Dr. Jason Weeks

Dr. Jason Weeks

DC, owner of Marietta Physical Rehab and Team Physician of X3 Sports

"I first heard about the Kinetic Arm about 18 months ago which prompted me to dive into the research. After looking at the extensive research conducted and viewing/testing the models first hand. I knew this was a must for many throwing athletes struggling with anything from labrum/rotator cuff injuries to UCL strains. I have now used it with a variety of my athletes in physical therapy and have seen it reduce pain with throwing from a 7/10 to a 0/10 by just simply putting it on. Rehabbing shoulder injuries in competitive athletes can be a challenge because of the stress involved with the throwing and swinging motions, but with the Kinetic Arms' ability to offload stress while allowing proper biomechanics and full ROM, the process can be streamlined with better outcomes. Highly recommend 10/10!"

Dr. Nathan Teter

Dr. Nathan Teter

PT, DPT & Owner of Apex PT

"The Kinetic Arm by all means can be considered a potential and literal game changer for the overhead athlete. The Kinetic Arm has the capacity to reduce harmful stress on the joints and its non contractile structures, while at the same time allowing for sustained duration and intensity for practices sessions with overhead athletes. The applicability of this product may extend to various sports including baseball, football, tennis, pickleball, and track and field athletes. As a physical therapist and strength and conditioning coach, I would strongly consider using this product for rehab and training alike to ensure the long term health of my overhead athletic patient or client."

Dr. Tyler Wallace

Dr. Tyler Wallace

PT, DPT, CSCS

"Not only does the data show a decrease in elbow torque, the Kinetic Arm has the potential to be a great tool for performance and rehabilitation for throwing and swinging athletes. After testing it myself and with a few of our golfers, it helped alleviate elbow torque and stress off the trail arm. I'm excited to see the growth of the Kinetic Arm in multiple sports."

Dr. Edward Kim

Dr. Edward Kim

PT, MTC, TPI0-M3 

Solving One Of Baseball's Biggest Challenges

Arm injuries have become one of the fastest-growing challenges in baseball. As players throw harder, compete year-round, and accumulate more repetitions than ever before, the shoulder and elbow are subjected to increasing levels of stress with every throw and swing.

Despite advances in strength training, recovery protocols, pitch counts, and arm care programs, overuse injuries continue to rise across youth, amateur, collegiate, and professional baseball.

The reality is that the greatest forces on the arm occur during the throwing and swinging motions themselves—when stress on the shoulder and elbow is at its highest. While traditional approaches focus on preparing the arm before activity or helping it recover afterward, they often overlook the moment when demand is greatest.

To truly support arm health and performance, athletes need more than training and recovery alone. They need support that helps manage and offload stress during action—when the arm needs it most.

The Reality of inevitable
ARM STRESS

Every throw, pitch, and swing places significant stress on the shoulder and elbow. During high-velocity throwing and powerful rotational movements, these joints are exposed to substantial forces as they work together to generate and control movement.

The problem is that stress often accumulates silently. Even when the arm feels healthy, each repetition places demand on the tissues responsible for stability, force production, and recovery.

For athletes who throw and swing repeatedly, that hidden stress adds up over time—making what happens during the movement just as important as what happens before and after it.

THROWING ARM DEMONSTRATION

WHERE PEAK STRESS OCCURS

The greatest stress on the shoulder and elbow occurs during critical phases of the throwing motion as the arm rotates, accelerates, and rapidly decelerates. These moments generate the highest mechanical forces on the joints during every throw.

During these phases, the arm must absorb tremendous load in a fraction of a second. Supporting the arm during motion can help manage this stress when the forces are at their greatest.

This is where a new approach to arm care becomes essential.
INNOVATIVE SOLUTION
DUAL-JOINT SUPPORT

The Kinetic Arm incorporates a multi-patented MuscleWeb® activated stabilizing technology, a flexible, multi-directional tension based support system designed to protect the elbow and shoulder during dynamic movements without restriction. Its flexible design delivers activated stabilization in the arm’s passive ranges, where stress is highest, reducing strain and injury risk. This unique combination of unrestricted mobility and dual-joint support makes the Kinetic Arm essential for safeguarding athletes' arms while optimizing their performance.

HOW IT WORKS
VALIDATED BY RESEARCH
BACKED BY DATA

With more than a decade of research and data collection across leading sports performance labs, Kinetic Arm has been studied for its effects on elbow torque, arm mechanics, and dynamic arm stress during high-demand movement.

Using advanced wearable sensors and 3D motion-capture technology, researchers have analyzed how dynamic external arm support can help athletes manage mechanical load and support efficient movement patterns. Most recently, research involving Kinetic Arm was presented by ASMI and ABBS at the 2025 MLB Winter Meetings, adding to the growing body of evidence supporting dynamic arm stabilization in baseball.

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"I was tired of watching athletes get shut down by arm injuries. I was determined to find a better way."

INVENTOR. INNOVATOR. PROBLEM SOLVER

Kinetic Arm was invented by former baseball player, trainer, and biomechanics consultant Jason Colleran after experiencing firsthand how overuse injuries can derail athletic careers. Motivated to find a better solution, Jason spent decades working with athletes and studying human movement—leading to the creation of a new class of dynamic arm support designed to help athletes manage arm stress during motion.

A PROBLEM HE LIVED

Jason’s experience as a former competitive baseball player gave him firsthand insight into the physical demands of throwing and the impact overuse injuries can have on an athlete’s career.

A Mission He Accepted

For more than two decades, Jason has worked with athletes across multiple professional sports, specializing in performance, biomechanics, and injury prevention. He dedicated years to researching, designing, testing, and refining what would ultimately become Kinetic Arm.

A Solution He Created

Developed a first-of-its-kind dynamic shoulder and elbow stabilizer scientifically validated to reduce dynamic arm stress without restricting movement and now trusted by hundreds of thousands of athletes worldwide.

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Kinetic Arm is for everyone in the game.

EVERY POSITION / EVERY LEVEL

From pitchers and catchers to position players and coaches, baseball demands repeated high-stress arm movement. The Kinetic Arm provides dynamic shoulder and elbow support designed to help athletes manage arm stress during throwing and swinging throughout practices, games, and long seasons.
Built for Pitchers

High-Velocity Pitching

Pitching generates some of the highest forces in sports. Every pitch places significant stress on the shoulder and elbow as the arm accelerates and rapidly decelerates at high velocity. The Kinetic Arm provides dynamic support designed to help manage the mechanical load created during high-speed pitching and repetitive throwing workloads—helping pitchers maintain consistency through innings, bullpens, and long seasons.
  • Helps manage arm stress during high-velocity pitching
  • Supports durability through innings, bullpens, and long seasons.
  • Helps maintain consistency and accuracy under heavy workloads
  • Built for the demands of modern power pitching
  • Comfortable & easy to wear under uniform
baseball pitcher throwing with kinetic arm in game
Built for Catchers

Constant Throws

Catchers make more throws in a single game than almost any other position on the field. From explosive pop throws to second base to the constant return throws back to the mound, the arm is under continuous demand. The Kinetic Arm provides dynamic shoulder and elbow support designed to help manage the mechanical load created by repetitive throwing while maintaining the quick release and mobility required behind the plate.
  • Helps manage arm stress from constant throwing behind the plate
  • Supports the shoulder and elbow during quick-release throws to the bases.
  • Helps maintain consistent arm strength through long innings
  • Supports durability during heavy defensive workloads
Built for Position Players

Powerful Defensive Throws

Position players rely on quick, accurate throws across the field—from turning double plays to making long throws from the outfield. These explosive movements place significant stress on the shoulder and elbow throughout games and practices. The Kinetic Arm provides dynamic support designed to help manage the mechanical load created by repeated defensive throws while maintaining full mobility and arm speed.
  • Helps manage arm stress during repeated defensive throws
  • Supports shoulder and elbow during high-effort fielding plays
  • Helps maintain arm strength through games and practices
  • Designed for everyday throwing demands across the field
Built for Two-Way Players

Pitching & Hitting Demands

Two-way players place exceptional demands on their arms by both pitching and hitting. High-velocity pitching combined with powerful rotational swings creates repeated stress on the shoulder and elbow throughout games and training. The Kinetic Arm provides dynamic support designed to help manage the mechanical load created by both throwing and swinging movements.
  • Supports shoulder and elbow during throwing and rotational swings
  • Helps maintain arm strength through dual-role demands
  • Designed for athletes who both pitch and hit
Built for Coaches & Trainers

Throw More BP

Coaches and trainers throw thousands of pitches throughout a season—during batting practice, drills, warmups, and player development sessions. This repetitive workload places constant stress on the shoulder and elbow over time. The Kinetic Arm provides dynamic support designed to help manage the mechanical load created by repetitive throwing so coaches and trainers can stay active on the field while working with their athletes.
  • Helps manage arm stress from repetitive batting practice throws
  • Supports shoulder and elbow during long practice and training sessions
  • Helps maintain arm endurance through daily throwing workloads
  • Designed for coaches and trainers who throw and demonstrate drills regularly.
Jason Colleran on field with several baseball players that are wearing the Kinetic Arm explaining significance of dual joint support

GAME-CHANGING

BENEFITS FOR PLAYERS

Where Performance Meets Protection

Athletes across multiple sports rely on the Kinetic Arm to support the shoulder and elbow during high-demand arm movement. Designed to help manage arm stress and fatigue while maintaining natural motion, it promotes efficient mechanics, enables more quality reps, and supports recovery and long-term arm health during throwing, swinging, serving, and other overhead activities.

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Picture of five young baseball players on field standing together wearing the kinetic arm sleeve smiling to camera
Youth baseball pitcher pitching from mound during game while wearing Kinetic Arm K2 Youth Sleeve under uniform, providing elbow and shoulder support, stabilizing joints, and reducing dynamic arm stress
ALL LEVELS & AGES
IN PRACTICE & GAME

Kinetic Arm is trusted by baseball players at every level, from youth and travel ball to collegiate and professional baseball. Worn by pitchers, catchers, and position players alike, the K2 Sleeve features a lightweight, low-profile design that fits comfortably under uniforms and is built to be worn during both practice and games.

Designed to support the demands of repetitive throwing and swinging, Kinetic Arm provides dynamic support to both the shoulder and elbow without restricting natural movement. Whether on the mound, behind the plate, in the batter's box, or in the field, it helps players stay comfortable, confident, and ready throughout the season.

NATIONWIDE & ABROAD
WORN BY THE PROS

The Kinetic Arm is trusted and worn by professionals at all levels of baseball, from Little League World Series participants to Major League Baseball stars. It has gained significant recognition in Japan, particularly in Nippon Professional Baseball (NPB), where prominent athletes like Shota Imanaga, now in the MLB, use it for recovery, performance, and protection. Its proven effectiveness and medical-grade construction, has led to widespread adoption in professional training programs across MLB, MiLB, NPB, NFL, ATP, and other elite leagues both nationally and internationally.

See Japan News Article
PROTECT THEIR ARM EARLY
Youth Baseball

For young baseball players, managing arm stress during growth and skill development is especially important. As youth athletes progress through repetitive throwing and swinging—often while navigating growth spurts—the shoulder and elbow can be exposed to increased mechanical demands.

The Kinetic Arm Youth Sleeve is designed to support young baseball players as they train, compete, and develop their skills through repetitive throwing and movement. Constructed with medical-grade materials and powered by MuscleWeb® technology, it provides dynamic, non-restrictive support to both the shoulder and elbow to help manage arm stress and support efficient mechanics during growth and high-use phases—without limiting natural motion.

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K2 BioKinetic® Sleeve
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HSA/ FSA Eligible
Available in Adult & Youth Sizes
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BLOGS / MEDIA / PODCASTS

LATEST ARTICLES

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FREQUENTLY ASKED QUESTIONS IN BASEBALL

Yes. The Kinetic Arm is designed for high-demand throwing movements like pitching. Many pitchers wear it during bullpens, training sessions, and games as part of their arm care routine to help manage the mechanical stress placed on the shoulder and elbow during repeated throwing.

Independent biomechanics research (Balmes DPT, 2023) found no statistically significant change in arm rotation, arm speed, or arm slot when wearing the K2 sleeve. In fact, the proprioceptive feedback of the sleeve appears to help athletes move through more efficient throwing patterns. College pitchers in published research report pitching with improved mechanics — not despite the sleeve, but because of the feedback it provides.

Many athletes wear the sleeve during practice, bullpens, training sessions, and games. It can also be used during throwing programs or recovery sessions depending on a player’s workload and arm care routine.

No. The Kinetic Arm is not a performance-enhancing device. It does not add power, velocity, or mechanical assistance to a throw or swing.

The sleeve is designed to provide dynamic support to the shoulder and elbow during high-demand arm movement. Its MuscleWeb® system helps manage mechanical arm stress while allowing athletes to move naturally through throwing and swinging motions.

Because it functions as a supportive sleeve rather than a mechanical aid, it is intended to support the arm during activity—not enhance performance or provide an unfair advantage.

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In most leagues, the Kinetic Arm is allowed because it functions as a support sleeve rather than a mechanical aid. However, players should always confirm equipment rules with their league or organization.

The K2 sleeve has been featured in two published clinical case reports as a component of return-to-play programs for UCL strain, glenohumeral labrum tears, and valgus extension overload in collegiate baseball players. Any use during active injury recovery should be part of a supervised protocol involving your sports medicine physician or physical therapist.

Yes. In addition to throwing, the sleeve can be worn during rotational movements such as swinging. The design allows full mobility while supporting the shoulder and elbow during high-demand arm activity.

Yes. The K2 BioKinetic® Sleeve is eligible for purchase with HSA and FSA funds through our partner Truemed. Select the Truemed option at checkout to use your pre-tax health savings dollars. This makes proactive arm care accessible as a qualified healthcare purchase.

EXPERIENCE THE POWER OF DYNAMIC ARM SUPPORT

Trusted by more than 100,000 athletes, Kinetic Arm is helping redefine how players support their arms and the smarter approach to performance, recovery, and durability.

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