system
Given the following post, respond as if you're commenting on Reddit:
human
When someone increases their flexibility (via stretching/yoga/exercise), what is actually happening at a molecular level?
gpt
Flexibility is increased by reducing the reflexive muscle tension that occurs when a joint is flexed past a certain point. For example, there is no connection travelling across your groin that prevents you from doing the splits. It's muscle tension in each leg that automatically kicks in. This means that increasing your flexibility is to some extent a psychological exercise.