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Detection of physiological changes in knee cartilage using parametric T2 relaxation maps estimated with a dictionary method
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Orientador(es)
Resumo(s)
To investigate half-marathon running and recovery effects on knee articular cartilage (KAC) health in athletes, using dictionary-matching T2 maps, to detect changes and recovery patterns in KAC. Eleven asymptomatic volunteers (4 females, 7 males; mean age 40 ± 5 years, mean BMI 22.7 ± 1.4 kg/m2) completed a fixed-pace half-marathonwere studied. All were right-knee dominant and engaged in regular running. Sagittal T2-weighted Multi-Echo Spin-Echo images at 3 T were used to assess T2 values pre-run, post-run, and one week later for global and compartmental KAC. Recovery programme included low-intensity running, strength training and rest. Repeated measures ANOVA or equivalent non-parametric tests with post-hoc comparisons compared T2 values over time. Separate analyses were conducted based on laterality, gender and anatomical compartments. Significance was set at < 0.05. Post-run T2 values decreased significantly by 0.9 ms (− 2.0%, p < 0.001), with up to 5.3% reductions in medial tibial (MT) and femoral (MF) compartments. Recovery patterns varied by compartment, sex and laterality. Most compartments returned to baseline within one week; the lateral condyle (LatC) showed incomplete recovery (− 4.7%, Proportional Recovery Index (PRI) = − 0,1); the right knee’s MT exhibited overcompensation (6.3%, PRI = 2.6). Males showed higher baseline T2 values and more efficient recovery in the LatC compared to females (PRI = − 0.1 vs. − 0.4). Half-marathon running induces reversible reductions in KAC hydration, with most compartments recovering or overcompensating within one week. Dictionary-matching T2 mapping offers a robust approach for monitoring cartilage integrity and guiding individualised recovery strategies.
Descrição
Palavras-chave
Knee articular cartilage T2 mapping Dictionary matching Running Recovery Overtraining syndrome
Contexto Educativo
Citação
Coelho, J. M., Fernandes, T. T., Alves, S. M., Vilaça, A., Nunes, R. G., Nogueira, L., & Oliveira, A. (2026). Detection of physiological changes in knee cartilage using parametric T2 relaxation maps estimated with a dictionary method. European Journal of Applied Physiology, 126(2), 811–824. https://doi.org/10.1007/s00421-025-05898-9
Editora
Springer Nature