On a soccer field or basketball court, athletes must move while tracking opponents, responding to teammates, and changing plans. Preparing for those demands means considering how physical skills hold up when attention is divided.

This episode of the University Orthopedics PT Podcast with Dan Bien, Meredith Chaput, Ph.D., PT, DPT, SCS, explores neurocognitive rehabilitation after ACL injury. An assistant professor at the University of Central Florida, Chaput studies how the nervous system adapts after musculoskeletal injury and how those findings might inform clinical care.

How a knee injury affects the nervous system

The ACL contains sensory receptors that help provide information about the knee to the brain. Chaput explains that injury disrupts that input, and reconstruction does not necessarily fully restore the original connection.

The nervous system adapts to the altered information. Those adaptations can involve regions associated with movement, sensation, vision, and attention. Researchers are studying how rehabilitation might influence these changes and which adaptations matter most for long-term recovery.

Adding cognitive challenges with a purpose

Dual-task training combines a physical activity with an additional cognitive demand. That might mean responding to a visual cue during an exercise, making a movement decision, or stopping a planned response when a signal changes.

Chaput discusses the Control to Chaos Continuum as a framework for selecting and adjusting these challenges. She emphasizes that cognitive demands can be introduced throughout rehabilitation when matched appropriately to the patient’s physical abilities and understanding of the task.

An athlete may be ready for a more complex challenge during a familiar exercise while needing a simpler approach when learning a new movement. Progression therefore depends on the skill being practiced and the person performing it, rather than a fixed point on the recovery calendar.

Choosing tools that serve the goal

Lights, flashcards, visual cues, and virtual reality can all create opportunities for dual-task training. Chaput encourages clinicians to identify the demand they want to introduce, such as divided attention, decision-making, or response inhibition, and choose tools accordingly.

She also examines the differences between unstable surface training and perturbation training. The discussion underscores the need to consider the joint involved, the stage of recovery, and the intended response when selecting an intervention.

Looking more closely at return to sport

Strength, jumping and hopping ability, and psychological readiness remain important parts of the return-to-sport discussion. Chaput describes adding cognitive challenges to physical tests to explore whether performance changes when the athlete must manage another demand.

Interpreting those changes requires context. Someone with limited baseline physical capacity may show little additional decline during a dual task, even though important deficits remain. Researchers are still determining which measures and thresholds are most useful and how they relate to later outcomes.

For clinicians and athletes, the episode offers a practical introduction to an evolving field: understanding how movement interacts with attention, sensory information, and decision-making throughout recovery.