The Comprehensive High-level Activity Mobility Predictor-Sport (CHAMP-S)

Abstract

The Comprehensive High-level Activity Mobility Predictor (CHAMP) is a reliable and valid outcome measure that assesses high-level mobility in Service Members (SM) with traumatic lower limb loss. The CHAMP has the potential to be used to assess current high-level mobility capabilities in healthy, athletic individuals, to determine those athletes that may be at risk for injury, can be administered throughout rehabilitation process, and can assist with return to play decision making for collegiate athletes that suffer lower limb injuries. PURPOSE: To develop the reliability and validity of the Comprehensive-High-Level Activity Mobility Predictor-Sport (CHAMP-S) in Division I Collegiate Football Players. METHOD: 206 student athletes participated in the study. 97 were tested at one time by three testers (two using the paper format and one using a mobile device application) to determine CHAMP-S interrater reliability. 115 had completed CHAMP-S, anthropometric measures, upper and lower limb power, speed, and agility measures and underwent correlation analysis. 206 underwent ANOVA followed by post hoc analysis to determine differences between CHAMP-S scores between different football positions. Twenty athletes who underwent season ending injury were administered the CHAMP-S every 4-5 weeks throughout rehabilitation to assess change in high-level mobility and determine return to sport. RESULTS: The ICC’s for the CHAMP-S items ranged from 0.90 (95% Confidence Interval, CI: [0.85, 0.93]) to 0.98 (95% Confidence interval, CI: [0.97-0.99]) for Single Limb Stance, Four-meter side step test, L-Test, and Illinois Agility Test. The CHAMP-S was significantly correlated with BMI, % Body Fat, Vertical Jump, Broad Jump, 40-yard dash, and shuttle run. The CHAMP-S demonstrated differences between linemen and skilled position players in all planes of movement. All 20 athletes returned to play safely and have not suffered re-injury to the ipsilateral or contralateral lower extremity. The athletes achieved 103% ± 5% (95-109%) of their baseline CHAMP-S score (p = 0.09). CONCLUSION: The CHAMP-S is a reliable and valid measure of high-level mobility in Division I Collegiate Football Players that can help determine differences by position and assist return to sport following lower limb injury.