Just a quick photo here explaining. This is the exact same gym some time later, and this is the exact end of the floor in the same very pitiful lighting situation. However, instead of using the 70-200 f/2.8L II IS at f/2.8, 1/500, ISO 5000, I used the 135 f/2L, f/2.2, ISO 5000. In post I still had to go +0.40 exposure, but much better.
Gotta try my PS edit trick to get rid of that yellow haze - edit in PS, single adjustment layer - camera / cooling filter set at only 10-20% opacity - this will bring skin tones back to more natural.
Also, I use the 135 at f2 from the sidelines and don't have issues with DOF usually. The extra stop helps keep ISO (noise) down.
NAGBBMtLebo-18 by PVC 2012, on Flickr
Camera Canon EOS-1D X
Exposure 0.001 sec (1/1000)
Focal Length 135 mm Lens Model EF135mm f/2L USM
ISO Speed 3200
cmon guys these gyms are beautifully lit lol