SpaceRef: NASA Space Station On-Orbit Status 1 December 2017

ISS on orbit

Today – Circadian Rhythms: A 52S crewmember removed and stowed the Double Sensors and Thermolab Unit equipment that was used to complete a 36-hour Circadian Rhythms session that began on Wednesday.

Circadian Rhythms investigates the role of synchronized circadian rhythms, or the “biological clock,” and how it changes during long-duration spaceflight. Researchers hypothesize that a non-24-hour cycle of light and dark affects crewmembers’ circadian clocks.

The investigation also addresses the effects of reduced physical activity, microgravity and an artificially controlled environment. Changes in body composition and body temperature, which also occur in microgravity, can affect crewmembers’ circadian rhythms as well. Understanding how these phenomena affect the biological clock will improve performance and health for future crewmembers.

Read more at SpaceRef

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