Movies are easier than reading sometimes!
Muscle cells part 1 – You should know how they work! Watch this rather goofy professor explain it here.
More advanced biology:
Type 1 & type 2 muscle fibers – Understanding the difference between them.
How can I cope with HypoPP? Neurologist/Geneticist: Dr. Frank Lehmann-Horn – Explains how Type 1 and 2 muscle fibres are affected differently in the PPs.