At its core, muscle memory isn't about your muscles "remembering" anything.
Instead, it's about the neural pathways that are formed in the brain as a result of repetitive practice.
Over time, certain tasks become more automatic and require less conscious thought.
There are two primary types of muscle memory:
Procedural memory: This is the long-term memory of skills and procedures or "how to do things". Riding a bike, typing on a keyboard, or playing the guitar relies on procedural memory.
Adaptative memory: This refers to how our muscles remember certain levels of strength or endurance. When someone stops exercising for a while and then returns to it, they often regain their strength or muscle size more quickly than someone who's starting fresh.