Fig 1. Biochemical variables assayed pre-marathon (B), upon completion (T0) and next-day (T24) in 18 successful finishers with complete data across the three measurement points.

T0 vs B ***P<0.0005, **P<0.005, *P<0.05. T24 vs B ^§§§P<0.0005, ^§§P<0.005, ^§<0.05. T24 vs T0 ⁺⁺⁺P<0.0005, ⁺⁺P<0.005, ⁺P<0.05. CK–creatine kinase; cysC–cystatin C; KIM-1 –Kidney Injury Molecule 1; NGAL–neutrophil gelatinase associated lipocalin; NSE–neuron specific enolase; sCr–serum creatinine; TP–Total protein.