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Flex ProGrip for Baseball Elbow Health

Jun 6, 2025

Overview

This episode of the KP3 Community Podcast features an in-depth interview with Adam, co-founder of Flex ProGrip, discussing the innovation, development, and application of their product for improving forearm strength and reducing elbow injuries in baseball. Additional segments include an audience Q&A addressing misconceptions about workload management and closing community updates.

Flex ProGrip Origin and Development

  • Flex ProGrip was developed in response to a lack of solutions for why UCL (elbow) injuries occur in baseball.
  • The founders focused on understanding grip strength's connection to elbow health and performance.
  • They identified that training the muscle-tendon units around the elbow could increase resilience, unlike the constant strength of the UCL and bones.
  • Flex ProGrip uses force plates for each finger (excluding the thumb) to measure and train relevant forearm muscles for throwing athletes.

Product Differentiation

  • Unlike traditional grip tools, Flex ProGrip isolates finger-specific force and speed output, omitting the thumb, which does not contribute to medial elbow stabilization in throwing.
  • The device captures real-time data, tracks progress, and helps customize training.

Redefining Strength and Training Principles

  • Standard baseball grip routines often focus on aesthetics or non-specific strength, which may not translate to performance or protection.
  • Flex ProGrip emphasizes specific, high-intensity (≥70% max voluntary contraction) training for tendon stiffness and endurance.
  • Gains in tendon stiffness lag behind muscle strength and need focused, progressive loading over 8–12 weeks.
  • Objective assessments are prioritized for both maximizing player development and preventing overtraining.

Application in Athlete Readiness and Performance

  • Routine, minimally invasive strength assessments guide training intensity and recovery, typically using baseline and post-outing data.
  • Red-flag thresholds based on a large athlete database aid in decision-making for athlete health and program adjustments.
  • Testing and training are integrated, similar to how radar guns inform throwing and development in pitching.

Performance Enhancement Insights

  • The device helps identify finger bias (index vs. middle) impacting pitch types and injury risk, refining training or pitch selection.
  • Improving intrapersonal finger rate of force development can boost spin rate independent of velocity.
  • Objectivity allows for nuanced adjustments, potentially reducing injury rates and enhancing performance long-term.

Audience Q&A: Misconceptions on Limiting Pitchers

  • Workload management is not about limiting athletes but building up robust, ready pitchers through strategic progression.
  • Data shows a high rate of Tommy John surgeries among 16–19-year-olds, highlighting the need for monitored workload build-up.
  • Coaches are encouraged to rely on objective measures (not just pitch counts) and to tailor throwing programs to individual readiness, not tradition or convenience.
  • Parents and coaches are urged to use tracking tools and progressive buildup, especially during transitions between seasons.

Community and Upcoming Events

  • Flex ProGrip is hosting a webinar (June 10th at 12 p.m. ET) featuring medical and performance experts discussing new research on elbow health and Flex ProGrip’s impact.
  • KP3 community updates include new course modules and future podcast topics focusing on biomechanics and skill acquisition.
  • Listeners are invited to suggest future guests and remain engaged via website resources and email notifications.