context: Mark loved going jogging but lately he was starting to feel very sore and tired after a long run and that worried him. He talked to a fitness expert friend of his, who recommended taking extra time to limber up his muscles before and after a jog. He told Mark that he needed to lie down face-up and elongate his limbs as much as possible, working the tendons and muscles extensively, so that's just what Mark started doing the very next morning.
keywords: back lay leg stretch