Biological Rhythms: Flight Engineer (FE)-6 Gerst removed a digital walk holter and actiwatch to end a data take for Biological Rhythms and saved the data to a medical laptop. Biological Rhythms 48 hours studies the effects of long-term microgravity exposure on heart function by analyzing an astronaut’s electrocardiogram for 48 hours. Capillary Flow Experiment (CFE) …