out the hamstrings and the tendons around the knee which can get tight and inflexible when running.""The angle at which your legs are spread also gives a secondary stretch to the adductor muscles (inner thighs) which in turn  help release tightness

of thighs), hip adductors (inner thighs) and ITB are also considered 'core' muscles.This lot need to be strong but flexible; running may make you strong, but definitely not flexible. Running is the 'ying' to yoga's 'yang'; complementary opposites, and Bikram

  http://www.yogajournal.com/poses/486Muscles worked: Hip flexors, quads, adductors, lower back.How to do it:1.   Begin with your legs stretched out in front of you. You can use a yoga block or sit on a folded towel or blanket if your hips and groins