CD8A and Familial prostate cancer: Additionally, we found no statistically significant correlations between changes in T-cell density and the number of exercise training sessions attended or changes in maximal oxygen consumption.In this secondary analysis of a randomized controlled trial, we found no impact of the exercise regimen on tumour-infiltrating CD3<sup>+</sup> and CD8<sup>+</sup> T-cell density in human prostate cancer.