ESA astronaut Luca Parmitano explains the Muscle Atrophy Research and Exercise System (MARES) before his Volare mission to the Internatioanl Space Station in 2013.

A highly-advanced exercise machine, MARES examines astronaut muscle strength during a workout in space.

Luca’s Volare mission involved over 30 experiments, three spaceship dockings and two spacewalks.

Follow Luca via http://lucaparmitano.esa.int