MPs in non-diving subjects. The data show the MPs in (A) blood and (B) perspiration. Blood and perspiration were collected before and after a 60 min terrestrial workout, as described in the Methods. The sub-groups for blood MPs are represented as the number of MPs/µL, where significant increases were seen for all the sub-groups post-exercise except for CD41 (mean ± SD, n = 5, * p < 0.05, paired t-test). The sub-groups for perspiration MPs are represented as the % of MPs expressing proteins specific to alternative cell types, as described in the text. Significant changes post-exercise are as shown (mean ± SD, n = 5, * p < 0.05, paired t-test; NS indicates not statistically significant).