This document discusses the different types of muscle fibers: Type 1 slow-twitch fibers, and Type 2 fast-twitch fibers including Type 2a fast oxidative glycolytic fibers and Type 2b fast glycolytic fibers. It aims to describe the structure and function of each fiber type, how recruitment patterns vary, and how fiber types can adapt to long term activity or detraining. The document also analyzes how different sports may require different fiber type compositions and discusses fiber type considerations like potential, training effects, detraining effects, and recovery needs.

1. Muscle Fibre Types
Lloyd Dean

2. Re-cap
Very important……………
Have we learnt?
Quick fire questions!

3. Can you spot each connective
structure?

4. Articulate
Try and describe
the basic structure
of muscle by
looking at this
picture
-Tendon
-Epimysium
-Fascia
-Bundles of
muscle fires
-Perimyisum
-Muscle fibre
-Myofilament
-Actin
-Myosin

5. Aims
Describe structure and function of Type 1, Type 2a and Type 2b (P4)
Review how recruitment patterns vary (M4)
Describe the ability for the muscle fibres to adapt with increased
long term activity and detraining (P4)
Analyse the different structures and how each sports may require
ranging fibre types (D4)

6. Task
Team “Oxy”
Team “FOG”
Team “Bolt”
Walk around the
12 press ups
Every 10 seconds
room until told
otherwise
1:1
3:1
I shall pick the music!
perform an
explosive activity
10:1

7. Muscle Fibre Types
Why? Why?
Slow twitch fibres
Type 1
Fast twitch fibres
Type 2
Slow oxidative fibres
Fast glycolytic fibres
Red in colour
White in colour
Contain large numbers of
mitochondria (Power
providers)
Contain low numbers of
mitochondria
Endurance type activities
Strength / anaerobic type
activities

8. Muscle Fibre Types
Type 2 fibres subdivide:
Type 2a – Fast oxidative glycolytic (FOG)
Type 2b – Fast glycolytic (FG)
 What sports would lend them selves to each type 2 fibres?

9. Enduranc
e
What does
this tell us?
Can we apply
it to other
Characteristics?
Force

10. Click through for Pinterest board!

11. Fibre Type Considerations
Most potential is based on genetics
Specific training can develop respective fibre types (E.g.
Clean and jerk for Fast Glycotic)
Detraining will result in the loss of F.O.G & F.G to
Oxidative
Recovery (Timings)? Nutrition? Sleep? Tapering?

13. Task
Oxidative
F.O.G
Glycogen stores Moderate
Fatigability
F.G
Highest
Moderate
Force Produced Low
We are going to look at certain words related to fibre types
With your study buddy, try and compare each fibre type
Include different sports for each
Your table might be
structured liked this
If you don’t know a term yet, feel free to use mobile devices to
research
http://www.wordle.net/show/wrdl/5994443/Muscle_Fibre_Types

14. Terms
Structure
Glycogen Stores
What is it? Also see these as
clues! E.g. if it needs oxygen it
will probably be….
Carbohydrate stored in the
muscle and liver
Myoglobin
Found in muscle tissue. An
oxygen-binding protein.
Capillary Density
The amount of capillaries found
in the muscle
Powerhouse of the cell. Help to
convert food into energy.
Mitochondrial Density
Triglyceride Stores
Fat stores in the body

15. Recap
Snowball
time………………………………………………
……………………………………………
It is nearly Christmas!
Let’s turn answers into merit and distinctions!