What Muscles do Kettlebell Swings use?

The kettlebell swing is a staple exercise of CrossFit training or everyday strength and conditioning work; one that places great demands on the muscles of our posterior chain.

More specifically, a study submitted through the British Journal of Sports medicine in 2013 noted that kettlebell swings use predominately hamstring muscles, however they actually target semitendinosus, the medial, inner hamstring over the lateral biceps femoris, with higher levels of Electromyographic (EMG) activity noted through the skeletal muscles.