The psoas is a deep-seated core muscle connecting the lumbar vertebrae to the femur. The psoas major is the biggest and strongest player in a group of muscles called the hip flexors: together they contract to pull the thigh and the torso toward each other.
7 photos: Photos: Tallest man meets shortest man. Chandra, meet Sultan â Chandra Bahadur Dangi, at 21Â½ inches the shortest adult ever verified by Guinness World Records, poses Thursday in London with the world's tallest man, Sultan Kosen, who stands 8 feet 3 inches tall.
She is 37 years old, and said to be 7ft 8in tall. Shortest man ever. Gul Mohammed, of New Delhi, is the shortest adult human being ever, according to the Guinness Book of World Records. He stood just 1ft 10in. He died, aged 40, of respiratory problems brought on by heavy smoking.