Muscle contraction. Year 11 P.E. Types of contractions…. What are the different muscle contractions?. Isotonic – When muscle length changes through a range of motion. Concentric – Muscle shortening (upward phase in bicep curl)
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Year 11 P.E
-method by which muscles are thought to contract.
At a very basic level each muscle fibre is made up of smaller fibres called myofibrils. These contain even smaller structures called actin and myosin filaments. These filaments slide in and out between each other to form a muscle contractions, hence called the sliding filament theory!
Partially contracted Muscle:
Fully Contracted Muscle:
2. Research sliding filament theory
Create a PP/Poster/Skit/Speech explaining how sliding filament theory works…