The New Era FitScore study built a 90-second, full-body reactive fitness test. Clubs can use it as a general profile, but role-specific decisions still need match data, individual baselines, and proof that changes exceed normal test error.

Deva, Berisha, Prieto-González and Sagat’s New Era FitScore study developed a comprehensive fitness test, the New Era FitScore (NEFS), integrating full-body movement with reactive agility and neuromotor components. It used a 90-second circuit that combines burpees with reactive sprints triggered by randomized Witty SEM lights. The sample was 96 participants, including 24 U15 male soccer players. The authors reported high overall test-retest reliability, ICC (2,1) = 0.940, 95% CI = 0.906-0.961, and, in the U15 soccer group, a correlation with Yo-Yo test distance and estimated VO2max of r = 0.742, p = 0.002.