Lifting is the act of picking up an object or another person, typically for the purpose of repositioning. One usually lifts using their hands and arms, but depending on the size and weight of the object and it’s starting position, one might also need to engage their legs for further support and to avoid back injury. One may also lift an object to check underneath it if looking for a missing item. Lifting could also refer to the motion of raising one’s head or another part of their body further up, such as lifting one’s hand up to be called on in a classroom.
“Average” is unclear as there is variation between individual fitness level, body type, and exercise experience. According to ExRx.net, an adult man weighing 198 pounds with intermediate lifting experience can bench press 135 pounds, deadlift 335 pounds, and squat 285 pounds.
A gorilla’s upper body strength is six times more than that of an adult human. The Guinness Book of Records states that a silverback gorilla can lift up to 1800 pounds (815 kg) of dead weight.
A stair lift utilizes a mechanical system to lift people up and down the stairs. A chair or lifting platform is attached to the rail, which is then mounted to the treads of the stairs. The person will sit in the chair or platform to be lifted up or down the stairs.