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.
1 ^ New world's smallest woman: Ten things you need to know about Jyoti Amge. Guinness World Records. 14 December 2011. Born on 16 December, 1993, in Nagpur Jyoti measures 61.95 cm (2 ft) tall. ^  Tiny Teenager Stands Tall Despite Her Height of 23 Inches.