Physiological measurements were conducted and blood samples were collected during a 100km-24hr-Hike May 9th-10th, 2015. Dr. Steinach and doctoral candidate Marc Jörres themselves received little sleep when travelling along with the 20 participants to conduct the measurements and collect blood samples. Even though this years conditions were rather difficult (very stormy weather and chilly temperatures), 13 participants reached the 70km and 7 reached the finish after 100km – which is very good since less than 1/8th reached the 100km-finish of a starting field of over 800 athletes.

100km-Hike - baseline measurements.

100km-Hike – baseline measurements at the Center for Space Medicine.

Collecting blood at 30km-Checkpoint.

Collecting blood at 30km-Checkpoint.

...and again at 70km-Checkpoint.

…and again at 70km-Checkpoint.

The reward after a hard days (and nights) work: the multitude of blood samples.

The reward after a hard days (and nights) work: the multitude of blood samples.