What type of exposure will I need for this shoot?

[Undiscovered]

In my gym there are dome lights set up over head of most equipment. Surrounding the rest of the gym is halogen lights which really brighten the room. When those lights are shut off and only the dome lights are lit, the lightening hitting individuals who workout really define their muscles, especially in the mirror. If all lights are on, not so much.

How do I compose the shot so that when I take a picture of an inidivudal under these lights to get a defined capture of the body?

Thanks

[Anke]

I say set your self a reasonably high ISO, say 400 or maybe a bit higher and go and experiment. That's the beauty of the screen on the back of your camera. Set the camera to P if unsure.

[Tee Why]

I'd probably meter off the body you want to expose properly with a spot meter.