slim young woman lying in supta virasana, reclining hero pose, stretching abdominal and back muscles on mat in gym

abdomen adult advanced asana athlete authentic back body candid caucasian concentration exercise female fit fitness flexible girl health healthy hero lifestyle lying meditating muscle person pilates pose position posture practice professional reclining reflection relaxation scrawny skinny slim sport stance strength stretch supta training virasana wellbeing woman workout yoga yogini