Humans Energy Systems and Muscle Fibers

Muscle Fibre Types

Slow Twitch

High in myoglobin

Diameter can increase with training

Red and darker in color

Make energy slower then others

Maintain low energy levels for longer periods of time

Better for Endurance

Fast Twitch

Moderate fatigue

In between type 1 and type 2b

High Power

Quick Contraction Speed

Anaerobic

Pale in colour

Pale in colour

Tire Quickley

Anaerobic

ATP-PC

Fastest

Sprinting

ATP

Adenosine Tri-phosphate

Energy for all living things

Breaks down food

Used for fuel

Energy currency

Lactate Threshold

VO2 Max

Max amount of O2

Lactic Acid Buildup in blood

Key Nutrients

Carbohydrates

Sugars

Most abundant energy

Provides quick energy

Builds cell membranes

Protiens

Builds muscles

Repairs muscles

Myoglobin

Proteins

Delivers oxygen to muscle

Energy Systems

Aerobic

Cellular Respiration

Oxygen is present

Lots of oxygen

Endurance

Marathons

Byproduct is Co2 and O2

Anaerobic

ATP-PC

Anaerobic Alactic

1 ATP Molecule

No oxygen

Quick movement

Powerful

Creatine Phosphate

100m sprint

10-15 sec

Glycolysis

Anaerobic lactic

2 ATP molecules

Lactic Acid Buildup

15 sec - 2 minutes

Glucose

Also not endurance