Determine your pelvic ground muscles. To achieve this, prevent peeing midstream. The muscles you employ To accomplish this are your pelvic flooring muscles.one ENTRIES FOUND: extensive–lasting (adjective) extensive–lasting /ˈlɑːŋˈlæstɪŋ/ Brit /ˈlɒŋˈlɑːstɪŋ/ adjective longer–lasting; longest–lasting prolonged–lasting /ˈl