parachuting / skydiving
may involve a phase of more or less free-falling (the skydiving segment) which is a period when the parachute has not yet been deployed and the body gradually accelerates to terminal velocity --wikipedia
Sports / Fitness
weightlifting
Calibrated as a sport and as exercise
Brazilian jiu-jitsu
a martial art and combat sport based on ground fighting (ne-waza) and submission holds. --wikipedia
kitesurfing
"an extreme sport where the kiter uses the wind power with a large power kite to be pulled on a water, land or snow surface." --wikipedia
skateboarding park
"a purpose-built recreational environment made for skateboarding, BMX, scooter, wheelchair, and aggressive inline skating" --wikipedia
Formula One World Championship
"A Formula One season consists of a series of races, known as Grands Prix, which take place worldwide on both purpose-built circuits and closed public roads." --wikipedia
Formula E World Championship
"a single-seater motorsport championship for electric cars" --wikipedia
Chinese Olympic Team
Level of organizational energy
US Olympic Team
Calibrated at present, in 2016 and 1984.
Naomi Osaka
Calibrated as a tennis player (public) and personally (paid-subscriber access)
Simone Biles
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, snowboarding
"Skiing was primarily used for transport until the mid-19th century, but since then has also become a recreation and sport." --wikipedia
NBA Finals
Calibrated at 455 in 2005's Truth vs. Falsehood
NCAA
National Collegiate Athletic Association, Revenue: 995.9 million USD (2016), Founded by Theodore Roosevelt in 1906