Hi Shelly. The answer to your question and to your clients is “it depends.” Like everything else in the fitness and health world everyone is different, and this difference determines when someone should start working out, and the results that they may see. In my opinion, a lot of “recovery” (from whatever, an injury, a pregnancy, a surgery) depends on the person’s condition BEFORE that event! If someone was in excellent condition prior to their event, generally they have less distance to cover to return to ‘shape,’ and the contrary is also usually true (someone who was de-conditioned prior their event will have slower progress, and the time frame for them to start BACK may be longer. Anyway, I think that you get what I’m saying it “it’s all relative…”
I hope that this helps.