Calcium retention capacity (CRC) in kidney mitochondria after 20 min of bilateral renal ischemia where the mice body temperature was maintained at normothermia (IR-37 °C) or at mild therapeutic hypothermia (mTH) (IR-34 °C), and 2 h (a) or 24 h (b) of reperfusion, or after a Sham procedure with the same body temperature (Sham-37 °C and Sham-34 °C). Renal ischemia-reperfusion did not have any effect on CRC 2 h after reperfusion, but CRC was significantly altered at 24 h, whereas mTH prevented this decrease and preserved CRC. Data are presented as median with interquartiles. *** p < 0.001, Mann–Whitney test. ++ p < 0.01 vs. Sham-37 °C, Mann–Whitney test.