Relieving tight hamstrings using the “Jackknife” on a Reformer.
The photographs below shows two phases of moving into a Pilates Reformer move called "The Jackknife". This is a wonderful exercise that is considered a "Counter stretch" for tight hamstrings as well as tightness in the lower back that increases flexibility. It is generally used after you have performed a straight legged forward bend and other more basic hamstring stretches. [caption...