Biomechanical concept of exercise
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BIOMECHANICAL CONCEPT OF EXERCISES
By maria
What is Biomechanics?Biomechanics: The study of movement.Knowledge of joints, muscle structure, and their possible actions lead to a better understanding of what occurs during the execution of strength and other exercises.
Biomechanics: The science concerned with the internal and external forces acting on the human body and the effects produced by these forces.
Stability
Stability is the act of maintaining your body to
ensure safety and effectiveness
when using free weights
Maintaining a stable (balanced) body is necessary to ensure safety during exercise
execution. Stability also
helps produce the desired
results when using free weights
when doing an overhead press the muscles of the legs and trunk must contract to hold you in place
increasing stability is to bend your knees in order to lower your center of gravity (where your weight is concentrated)
Foot placement also plays an
important role
Components of Force1. The magnitude or how much force is applied
to the dumbbells, barbells, or machine handles
2. The force must have direction: The way in which the force is applied.
3. The point of application of the force: Where the force is applied on the body or implement being used. It plays a role in many exercises from the overhead press to the squat
4. The line of action or line of force
Angle of Muscle Pull
Inertia
Inertia is based on Newton’s first law of motio1. Resting inertia means that when an object is
at rest it tends to stay at rest unless acted upon by some outside force.
2. Moving inertia means that when an object is in motion it will remain in motion unless acted upon by some outside force
The Relationship between Force, Mass and Acceleration
• Newton’s Second Law of Motion deals with force and its relationship to mass and acceleration. In essence, in order to create a force you must place a mass into motion with acceleration and a change in velocity.
Work
• The actual amount of work that you do is measured by the formula W = F x D, where W= work, F= force, and D= distance or displacement of the object being move.
Power
• power is defined as the work done in a unit of time. To calculate it, you must first consider the time involved in executing the movement
powerlifting, more precise Mastery over the Weight is required. Lets look at things that may disqualify you:
1.Raising your butt2.Uneven lockout3.Dipping of the bar4.Heaving of the bar5.Moving your feet6.Beating the Press Command7.Beating the Rack Command8.Pronounced uneven extension during the Lift9.Rules about head movement10.Placement of the bar on your chest• Example: the squat and the deadlift, the
bench press
POWER LIFTING
Weightlifting is the more commonly known sport of these two strength sport giants• the clean • jerk and the snatchWeightlifting requires an extreme amount of speed and flexibility along with strength.
WEIGHT LIFTING
Equal and Opposite Reactions
• Newton’s third law of motion, known as the equal and opposite reaction principle, applies to weightlifting and bodybuilding exercises
Levers
1. First-Class LeversThe first-class lever is similar to the seesaw, in that it has its fulcrum between the force and the resistance
Levers
First-Class Levers The first-class lever
is similar to the seesaw, in that it has its fulcrum
between the force and the resistance
Second-Class Lever In the second-class lever, the weight
(resistance) is distributed between the axis of rotation (fulcrum) and the
application of force.
Third-Class Lever
In the third-class lever the force is
applied between the fulcrum and the
resistance.