16. Muscle Fiber Classes: Fast Oxidative & Fast Glycolytic

What is the common abbreviation for fast oxidative fibers?

FO

What is the myoglobin supply of fast oxidative fibers?

Intermediate supply

What anatomical color do fast oxidative fibers exhibit?

Light red color

What is the capillary supply of fast oxidative fibers?

Intermediate capillary supply

What two pathways generate ATP in fast oxidative fibers?

Aerobic respiration and fermentation

What types of activities are fast oxidative fibers good for?

Medium duration activities

What is the common abbreviation for fast glycolytic fibers?

FG

What is the fiber diameter of fast glycolytic fibers?

Larger fiber diameter

What is the myoglobin content of fast glycolytic fibers?

Low myoglobin content

What anatomical color do fast glycolytic fibers exhibit?

Light pink/white color

What vascular and organelle characteristics define FG fibers?

Few capillaries, few mitochondria

What is the glycogen content of fast glycolytic fibers?

High glycogen content

What pathway provides most ATP for fast glycolytic fibers?

Anaerobic fermentation

What are the contraction and fatigue speeds of FG fibers?

Quick to contract, fatigue

What types of activities are fast glycolytic fibers best for?

Short duration activities