improve-training

Question 1

which type of contraction produce positive work that = increase in mechanical energy

Answer 1

concentric

Question 2

which type of contraction produce negative work that = decrease in mechanical energy

Answer 2

eccentric

Question 3

which force produce 0 work and no change in mechanical energy

Answer 3

isometric

Question 4

which motion need increase in mechanical energy

Answer 4

lifted, speed up, stretched or deformend

Question 5

which motion need decrease in mechanical energy

Answer 5

lowered, slowed up, unstretched reformed

Question 6

which type of contraction create torque in same direction as observed in motion

Answer 6

concentric

Question 7

which type of contraction create torque in opposite direction of observed motion

Answer 7

eccentric

Question 8

which type of contraction create torque in opposite direction to motion that would occurs wihtout contraction

Answer 8

isometric

Question 9

muscle that is stretch during extreme range of motion need to be flexible like the _ in the vertical jump

Answer 9

shoulder joint

Question 10

muscle that are active when large joint angular acceleration or impact occur need to be powerful so need to be strength and power like the _ in vertical jump

Answer 10

anke PF, knee + hip extensor and shoulder flexor

Question 11

what is the goal, mechanical goal and subgoal exemple in high jump

Answer 11

goal: clear a crossbar set as high as possible
mechanical goal: maximaze the height of the crossbar cleared
subgoal:Maximize height of jumper’s CG at takeoff
Maximize vertical displacement of CG from takeoff to max height
Minimize difference between max height of jumper’s CG and crossbar height

Question 12

what can be done to maximize height of the jump CG at take off

Answer 12

Raise the CG as high as possible at the instant of takeoff
- Achieve an upright trunk position
- Fully extend the takeoff leg
- Reach high upward with both arms and the free leg

Question 13

what to do to Maximize vertical displacement of CG from takeoff to max height

Answer 13

Make the vertical velocity of the CG at takeoff as high as possible
- Maximize vertical ground reaction force
push down against the ground with as much force as possible
Increase run-up velocity
Accelerate the arms and free leg upward

• Maximize duration of takeoff foot contact during takeoff phase
  CG low at the start of takeoff and high at the end of takeoff
  Swing body parts through a large range of motion