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.