Biomechanics Jan 24

Question 1

What force and extension of a joint constitute a high power movement?

Answer 1

large
high

Question 2

Stiff tendon - describe m and tendon action on stretch vs compliant

Answer 2

stiff: muscle not as active, tendon stretch less

Question 3

+ compliance tendon = __ stretch

Answer 3

more

Question 4

What makes a tendon stiffer?

Answer 4

incr collagen
large and more area

Question 5

What type of collagen is in a tendon?

Answer 5

type 1

Question 6

What type of tendon (stiff vs compliant) cause more injury?

Answer 6

we don’t really know
endurance compliant sounds better
high power = stiffer better but unclear really

Question 7

What part of the muscle can we influence with training?

Answer 7

force by phys cross sec area (number of sarcomeres) –> fibre length and pennation angle

Question 8

How does pennation angle increase force production?

Answer 8

more muscle fibres = larger PSA > anatomic
*some force transmission along line of action

Question 9

list 5 things you can adapt with training in terms of MTU

Answer 9

• fibre length
• pennation angle
• tendon stiffness
  -fibre type
  -moment arm (hypertrophy m)
  -size