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Muscle Fiber Type IIa

Fast-Twitch Oxidative-Glycolytic

Anatomy

Short definition

Fast oxidative-glycolytic fibres — strength + endurance.

Full definition

Type IIa are intermediate fast fibres with high force and moderate endurance, hypertrophying well; recruited at moderate-to-high intensities, the main target of hypertrophy and strength training.

Examples

8–12 rep hypertrophy sets target IIa.

Related terms

Muscle Fiber Type I Muscle Fiber Type IIx Hypertrophy Strength