Fulcrum
point about which lever rotates = joint
Load
The load to be moved by lever system = bodyweight
Effort
force applied to move load = muscle
FLE =
123
First class lever system
Fulcrum in the middle
Second class lever system
load in the middle
Third class lever system
effort in the middle
Example of first class lever
tricep dip
example of second class lever
calve raise
example of third class lever
bicep curl