Stark: without doubt!
Real: definitely not staged; most probably a part of her daily routine.
Stretching: exactly what her muscles are experiencing!
What I definitely did not know was that a book with this title existed!
But it does, and "The Stark Reality of Stretching: An Informed Approach for All Activities and Every Sport by Dr Steven D. Stark" looks like a really serious piece of sports exercise literature. You pic could easily have been on the front cover. Compliments and regards jnconradie