Returning athletes to sport after ACL reconstruction surgery requires more than simply rebuilding strength. It requires restoring movement quality, deceleration control, sprint mechanics, and the confidence to handle the chaotic demands of sport again.
Diwesh Poudyal of Champion Physical Therapy and Performance walked us through how motorized resistance can support each stage of the ACL return-to-sport process. From early quad restoration to late-stage sprint preparation, the goal is to progressively rebuild the athletic qualities athletes need on the field in an intentional and systematic way.
Rather than focusing on isolated exercises, his framework starts with the demands of the sport and works backward to build a progression that prepares the athlete for those demands. So starting with month 9 and eventually arriving at month 4, when looked at in reverse, it should look like a logic and effective ACL rehab protocol.
Month 4: Rebuilding Strength and Early Movement
Around month 4 post-op is often when athletes begin transitioning more into performance-based training. The priority at this stage is restoring strength, rebuilding quad capacity, and reintroducing controlled locomotive patterns.
Typical focuses include:
-Resisted marching and early jogging progressions
-Low-level eccentric deceleration drills
-Intro to single-leg hopping work
-Extensive quad strengthening and accessory work
Motorized resistance becomes particularly useful here because coaches can manipulate velocity and loads independently, creating stimuli from eccentric overload to max-force isokinetics.
Month 5: Introducing Deceleration and Sprint Preparation
Once strength and movement control improve, training begins to bridge toward sprinting. At roughly week 22, athletes may be introduced to submaximal sprinting at around 50% intensity, assuming they meet specific KPIs.
Training emphasis shifts toward:
-Eccentric overload deceleration drills
-Forward lunging and hopping variations
-Early change-of-direction prep
-Continued quad development and isokinetic strength work
Deceleration becomes a central theme. Sprinting isn’t just about acceleration, athletes must also safely create eccentric force fast when stopping or changing direction. Motorized resistance allows coaches to overload the braking phase by assisting the athlete toward the machine and forcing them to control the deceleration under load.
Month 6 and Beyond: Building Toward Higher Sprint Speeds
As athletes approach later phases of rehab, sprinting intensity gradually increases. The earlier phases of resisted marching, hopping, and eccentric-focused deceleration drills prepare athletes for these higher demands. By month 6 and beyond, athletes must be able to handle both faster sprint speeds and the associated braking forces.
Each phase should build toward the next, creating a progression that restores:
-Force production
-Elasticity and plyometric ability
-Acceleration mechanics
-Deceleration control
When done well, the entire progression forms a clear bridge between early rehab and full sport readiness.
Maintaining Quad Strength Throughout the Process
A question from the audience focused on whether isokinetic quad training continues later in rehabilitation.
The answer was yes.
Quad strength remains a critical factor not just during rehab, but even once athletes return to sport. Many athletes continue performing isokinetic quad work during the entire process to maintain strength and prevent regression.
With a consistent isokinetic speed limit (ex. ~0.2m/s), a knee extension becomes a simple but powerful tool to not only give a quad strength stimulus, but also objective data to track progress throughout the entire process.
Principles for Building Return-to-Sport Programs
The biggest lesson from the webinar was not a specific exercise, that a thoughtful programming philosophy combined with the hardware and software to support that is when practitioners can get high-level and repeatable return-to-play outcomes.
Effective return-to-sport training should:
-Start with the demands of the sport
-Prioritize athletic qualities over exercises
-Progress gradually from controlled strength work to full athletic movements
-Emphasize deceleration and eccentric force production, not just acceleration
ACL rehab is rarely linear and every athlete presents unique variables such as graft type, sport demands, and recovery timelines. But with intentional programming and the right tools, coaches can build progressions that systematically restore athletic performance.
Published: March 4, 2026