Slow oxidative (SO)

Definition

Slow oxidative fibers are a type of muscle fiber that contracts slowly and uses oxygen to generate ATP, making them resistant to fatigue. They are well-suited for endurance activities like long-distance running or cycling.

Related terms

Fast Glycolytic Fibers: These muscle fibers contract quickly and powerfully by using anaerobic metabolism, making them fatigue more rapidly than SO fibers.

Myoglobin: A protein found in muscle cells that binds oxygen, it is more abundant in slow oxidative fibers and contributes to their endurance capabilities.

Mitochondria: Organelles within cells that produce ATP through aerobic respiration; they are plentiful in slow oxidative fibers to support sustained muscle activity