The human body generally runs at about 100 watts

A human body gives off around 90 Calories of heat per hour or 100 watts of heat.

http://mb-soft.com/public2/humaneff.html

Lance Armstrong’s estimated power output on Alp d’Huez was 465 watts.

https://sportsscientists.com/2010/07/cycling-performance-what-is-possible/