2. Biomechanics of resistance exercise

Question 1

Origin and insertion

Answer 1

Origin is proximal
Insertion is distal
or it depend on which point is pivot and which is moving

Question 2

Muscles could be related to movement..

Answer 2

Agonist prime mover
Antagonist slower or stopper
Synergist if assist

Question 3

First class lever

Answer 3

A lever for which the force and resistance act on opposite site of fulcrum. The mechanical advantage depend by the ratio between the two forces. Maf/Mrf
>1 advantage

Question 4

Second class lever

Answer 4

Fulcrum.Fr.Fm
always an advantage lever
Triceps brachii or Calf muscles

Question 5

Third class lever

Answer 5

Fulcrum.Fm.Fr
always a disadvantage lever
Biceps brachii

Question 6

Force tends to rotate object

Answer 6

Torque or moment

Question 7

Most of the rotate limb on joint are lever class

Answer 7

three, in disadvantage
but it change during real word activities, frame by frame

Question 8

Tendon insert farther as variation, involve..

Answer 8

A better moment in the movement, but with less speed production

Question 9

Force (N)

Answer 9

Mass (kg) x accelleration (9.8m/s2)

Question 10

Work (J)

Answer 10

Force (N) x Displacement (m)
Torque x Angular displacement

Question 11

Power (W)

Answer 11

Work (J) / Time (s)
Force (N) x Velocity (m/s)

Question 12

Difference strength and power

Answer 12

Strength is the capacity to exert force at any speed
Power is the mathematical product of force and velocity at whatever speed

Question 13

Neural control main components for strength

Answer 13

Recruitment of MU
Size of MU recruited
Firing rates of impulse

Question 14

Regarding strength exert, is more important CSA or volume ?

Answer 14

CSA more then volume

Question 15

High pinnation angle it means on performance

Answer 15

More fiber in parallel, higher CSA, more strength, but less velocity power production, capacity related to fibers in series.

Question 16

Concentric action
Eccentric action
Isometric action

Answer 16

CA - contractile force > resistive force
EA - contractile force < resistive force
IA - contractile force - resistive force

Question 17

Strength to mass ratio

Answer 17

athletes ability to accelerate his body

Question 18

Inertia of weight

Answer 18

when accelerated it exert inertial force on the athlete

Question 19

Bracketing technique

Answer 19

10% more or less of weight to a variation of training

Question 20

Fluid resistance

Answer 20

force encountered by an object moving through a fluid

Question 21

Back muscle lever typology

Answer 21

great disadvantage
S shape, kyphotic slightly rounded

Question 22

Fluid ball

Answer 22

Abdominal fluids and tissue kept under pressure by muscles as abdominal and diaphragm