I spent a few hours in the studio last night with one of the better known local studio shooters working with a yoga instructor as our model. This was a workshop / training session to look at lighting to show off muscle tone and body contours. Planned output was B&W image that break some of the usual rules on exposure.
Single medium softbox on a boom provided the light. Height of the light and position of the model, in front of or behind the light were the main parameters that we played with on this shot. Getting the light to wrap the way we wanted took a fair bit of work on the model's part (it was easier to have the model move than to move the light). The position under the softbox (left and right) are important too. In this shot the model was slightly to the camera right of the light.
Version 2 - evened out shadows on the hand and toned down camera left leg.