Using incorrect technical language for movement analysis — muscles 'flex and extend', joints 'contract and relax'
“Use appropriate technical language when answering anatomy or movement analysis questions, eg muscles contract and relax rather than flex and extend”— 1PE0 Component 1, June 2023 Paper Summary
How to fix: Learn the correct pairing: MUSCLES contract (shorten) and relax (lengthen); JOINTS flex (decrease angle) and extend (increase angle). Never say a muscle 'flexes' or a joint 'contracts'. For antagonistic muscle pairs, always name both muscles, identify which is the agonist (contracting) and which is the antagonist (relaxing), and state the resulting joint action using the correct term (e.g. extension, plantar flexion). Conflicting statements within one answer cancel the mark — write only one clear, correct statement per mark.