A free subscription provides access to most calibrations on this site.
Calibrated as a tennis player (public) and personally (paid-subscriber access)
The "face" of the US Olympic team. Calibrated as a gymnast (public) and personally (paid-subscriber access).
MMA mixed martial arts
"sometimes referred to as cage fighting, no holds barred, and ultimate fighting, is a full-contact combat sport based on striking, grappling and ground fighting, incorporating techniques from various combat sports and martial arts from around the world." --wikipedia
"Skiing was primarily used for transport until the mid-19th century, but since then has also become a recreation and sport." --wikipedia