The word "flesh" is a metonym for the body that is made of flesh, and the word "body" often refers to the whole person. Alternate translation: "we had no rest" or "we were very tired" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
Possible meanings for "outside" are 1) "outside of our bodies" or 2) "outside of the church." The word "inside" refers to their inward emotions. Alternate translation: "by conflicts with other people and by fears within ourselves" (See: [[rc://en/ta/man/translate/figs-explicit]])