Types of muscle contraction

1. Muscular System
Types of muscle and types of contraction
Lloyd Dean

2. Recap: Let’s do it again!
Team “Oxy”
Team “FOG”
Team “Bolt”
Walk around the
12 press ups
Every 10 seconds
perform an
explosive activity
room until told
otherwise
1:1
3:1
I shall pick the music!
10:1

3. SUMMARY OF SKELETAL MUSCLE FIBER TYPES
Slow oxidative fibers
Myoglobin content
Nuclei number
Filament organization
Type of respiration
Speed of contraction
Duration of contraction
Resistance to fatigue
Twitch
Function
Fast oxidativeglycolytic fibers
Fast glycolytic fibers

4. SUMMARY OF SKELETAL MUSCLE FIBER TYPES
Slow oxidative fibers
Fast oxidativeglycolytic fibers
Fast glycolytic fibers
Myoglobin content
High
High
Low
Nuclei number
Multi nucleated
Multi nucleated
Multi nucleated
Filament organization
Striated
Striated
Striated
Type of respiration
Aerobic
Aerobic and anaerobic
Glycolysis
Speed of contraction
Slow
Fast
Fast and strong
Duration of contraction
Long
Brief
Short
Resistance to fatigue
High
Moderate
Low
Twitch
Slow twitch
Fast twitch
Fast twitch
Function
Endurance activities e.g., running a
marathon
Short periods of intense activity Activities such as sprinting or
e.g., strength training or throwing walking uch as sprinting or
a javelin
walking

5. Aims
By the end of the session you should be able to:
Describe the types of muscular contraction
State the terms; agonist, antagonist, fixator, synergist
Apply the first two aims to a table of various exercises

6. How do muscles contract?

7. Activity
Complete an exercise of your
choice
Try and explain what is
happening during the
movements!

8. Antagonistic Pairs
Biceps – Prime mover
Triceps – Antagonistic
Biceps – Antagonistic
Triceps – Prime Mover
This muscle determines the
movement of an action –by
Contracting
This muscle works with the
prime mover but creates an
opposing action – by relaxing

9. Agonist, Antagonists and.......
Synergists
Fixators
Help to steady the
movement
In biceps curl the brachialis
helps the action
Assist in stabilising the
origin of the agonist to
ensure movement occurs
In biceps curl the fixators
would

11. Muscle contraction
Three types
Isometric
Concentric
Eccentric

12. Isometric Contraction
Muscle stays the same
length during Contraction
or when the activity is
being carried out.
 Name a sport/activity where
isometric contraction occurs?

13. Concentric Contraction
This where the muscle
shortens when performing
an action
 Name a sport/activity where
Concentric contraction occurs?

14. Eccentric Contraction
Where the muscle lengthens
under tension – ends of the
muscle move further away
during an action
 Name a sport/activity where
Eccentric contraction occurs?

16. Isokinetic Contraction
Similar to isotonic in that the muscle changes length during the
contraction
Isokinetic contractions produce movements of a constant speed
(Specialist equipment needed to measure this)
Examples of using isokinetic contractions in day-to-day and
sporting activities are rare. The best is breast stroke in swimming,
where the water provides a constant, even resistance to the
movement of adduction.

17. Time to practice…….

18. Type of physical
activity
Agonist
Antagonist
Synergists
Type of
contraction
Fixator
Press Up (Upward
phase)
Press Up
(Downward
phased)
Lunge (Downward
phase)
Lunge (Upward
Phase)
You
You
You
M2 = Explain
D2 = Analyse
How could you
analyse this table?
What would happen if
Usain Bolt did not use
fixators or synergists?

19. How do muscles contract?

20. Articulate!
Articulate!
Articulate!
Articulate!