When people move upward (for example, climbing stairs), they are really doing work to overcome their own gravity. This work is easy to calculate, W=Fs, where F=G, and the work and power can be calculated by measuring the rising height and the time taken.

This unit is the logo on some fitness equipment, which is marked on the rotating gear. Each machine may be different in brand and performance, so Le Sauce is not very clear. Please ask the gym staff.