Research
Grounded in the evidence.
Every protocol in Fit2Play is built on established return-to-play and performance literature and validated testing methods — the same equipment and benchmarks used by leading high-performance programs.
Return to Sport & Rehabilitation
Single leg vertical jump performance identifies knee function deficits at return to sport after ACL reconstruction in male athletes
Kotsifaki et al. · 2021
The Deceleration Index: Is it the Missing Link in Rehabilitation?
Wolfe et al. · 2023
Arthrogenic muscle response induced by an experimental knee joint effusion is mediated by pre- and post-synaptic spinal mechanisms
Palmieri et al. · 2004
Sprint, Speed & Change of Direction
Maximal locomotor function in elite football
Buchheit & Eriksrud · 2024
Effects of Light Versus Very Heavy Resisted Sprint Training on Multidirectional Speed in Semi-professional Soccer Players
Baena-Raya et al. · 2024
The Deceleration Deficit: A Novel Field-Based Method to Quantify Deceleration During Change of Direction Performance
Clarke et al. · 2022
Reliability of phase-specific outcome measurements in change-of-direction tests using a motorized resistance device
Westheim et al. · 2023
Validity and reliability of a motorized sprint resistance device
Rakovic et al. · 2022
Reliability, factorial validity, and interrelationships of five commonly used change of direction speed tests
Stewart et al. · 2014
Muscle contributions to fore-aft and vertical body mass center accelerations over a range of running speeds
Hamner et al. · 2013
Lower Limb Strength & Power
Surface EMG
Effects of Resistance and Speed on EMG activity of Thigh muscles in Elite Athletes Throughout Resisted Sprint Running
Macchi et al. · 2025
Analysis and Biophysics of Surface EMG for Physiotherapists and Kinesiologists: Toward a Common Language With Rehabilitation Engineers
McManus et al. · 2020
Surface EMG in Clinical Assessment and Neurorehabilitation: Barriers Limiting Its Use
Campanini et al. · 2020
The Advantages of Normalizing Electromyography to Ballistic rather than isometric or isotonic tasks
Suydam et al. · 2017
Interpreting signal amplitudes in surface electromyography studies in sport and rehabilitation sciences
Vigotsky et al. · 2018