Naster 我认为source肌肉就是同时收紧center与base的肌肉。
The Source is your pelvic floor, consisting of the muscles that this challenge trains. A Source contraction is the simplest exercise of Mindgasm, and is the same as a basic Kegel exercise.
To find your source muscles, sit in an upright position.
The source muscles are the ones you use to hold back going to the toilet.
