Sculpting muscles with light

One of my flatmates likes to stay in shape and wanted me to take some pictures of him in proper lighting to see what his muscles looked at at their best. I took it as a challenge and opportunity to learn something new so I agreed to help. These are some of the pictures!
First I had a look at this great 2 minute tutorial to get me started.

Setup in my flatmate's room. The softbox was usually a bit closer to the camera to avoid spilling light on the back.

Key light was my 650W with one of the two diffusion screens removed and the lamp spotted. Don't have a grid for my softbox. So I used some aluminium foil clamped to the softbox to keep the spill off the back wall.

Used my 1000W for backlight. Softbox doesn't fit on it otherwise I would have used it as a key light. In stead I put double ND filter on it and flooded it. Some foil here as well standing in for barndoors which are in shipping. Sometimes I would put the softbox's inner diffusion over it when it needed some softening.

Here are some more pictures. I only had my 50mm lens so when we switched to poses with wider arms he had to step further back into the room and that makde it very difficult to keep light off the back wall. But I'm still quite pleased with how the results turned out!

The softbox warmed up the 650W, and that produced a nice color contrast between the 1000W kicker. I actually love the shiny look his skin got when I lit it with the kicker. But I had to watch for nasty shadows from the hard light. Otherwise pretty much the only thing I did was moving him and the light around so that the light produced defined shadows from his muscles and that was it. I did some light editing afterwards by darkening the background and upping the contrast on him.
Hope you enjoyed! Leave questions or comments down below or @tonivuc on twitter.