Top tip: eccentric is the type of contraction most misunderstood. Remember it is a contraction so the muscle cannot be relaxing, it is lengthening under tension. Tasks to tackle: Complete the below when performing a press-up. Perform the downward phase of a press-up What is happening at the elbow joint? Which muscle is contracting? What type of contraction is it performing? Now perform the upward phase of a press-up What is happening at the joint? Which muscle is contracting? What type of contraction is it performing? Try to hold the in the downward phase muscle feels as if it is contracting What type of contraction is it performing? Type of Movement Muscle contraction 1 2 3 Levers A lever consists of three main components, namely: a pivot (fulcrum); weight to be moved (resistance) and source of energy (effort or force). In the body the skeleton forms a system of levers that allows us to move. The bones act as the levers, the joints are the fulcrums and the effort is provided by the muscle. A lever has two main functions: To increase the at which a body can move. To increase the amount of resistance that can be overcome by a Classification of levers.
Top tip: eccentric is the type of contraction most misunderstood. Remember it is a contraction so the muscle cannot be relaxing, it is lengthening under tension. Tasks to tackle: Complete the below when performing a press-up. Perform the downward phase of a press-up What is happening at the elbow joint? Which muscle is contracting? What type of contraction is it performing? Now perform the upward phase of a press-up What is happening at the joint? Which muscle is contracting? What type of contraction is it performing? Try to hold the in the downward phase muscle feels as if it is contracting What type of contraction is it performing? Movement Muscle Type of contraction 1 2 3 Levers A lever consists of three main components, namely: a pivot (fulcrum); weight to be moved (resistance) and source of energy (effort or force). In the body the skeleton forms a system of levers that allows us to move. The bones act as the levers, the joints are the fulcrums and the effort is provided by the muscle. A lever has two main functions: To increase the at which a body can move. To increase the amount of resistance that can be overcome by a Classification of levers.