Levers
Lever systems in the body
First class lever
Second class lever
Third class lever
Levers are typically used to make physical tasks simpler, such as moving something heavy or moving something rapidly. The majority of our motions will require the utilization of while we workout.levers. For instance, when we run, lift weights, kick, or even move, we use all of our muscles and bones.
All lever systems are made up of four components
:
the load
the fulcrum
the effort
the lever
First class lever systems are arranged so that the fulcrum is between the
effort and the load
The second class has the potential to have the largest sporting application.
As we point our toes or move onto our toes, a lever system is generated between the burden of our bodyweight
The fulcrum lies in-between the other components of a first-class lever system; the load is in the second class, and the effort is in the third class. The most prevalent lever systems in the body are third-class lever systems, which are involved in many of our motions.
Mechanical advantage and disadavantage
:
Lever systems can be used to:
move a heavier load
move a load further and faster
Lever systems that let you lift a heavier load are said to provide a mechanical advantage. For example, a car jack will only lift a car a short distance, but requires relatively little effort to move it all at. These levers are slow but used where strength is a priority.
Lever systems where a greater force needs to be applied than the load to be moved is said to provide a mechanical disadvantage
Planes of motion
The body is split into three main planes. Each plane allows a specific type of movement. Many movements in sport take place
Example of actions
The mayor body axes
Around a joint, mobility is required. As a result, there must be an axis for the skeleton's bones to move around in order for these motions to occur. For instance, we know that a biceps curl that involves flexion and extension in the sagittal plane is only feasible because of the elbow joint.
Alejandro Uribe 9A