Generally you can begin with breathing exercises and gentle pelvic floor activation as early as a few days after delivery. Around 4 to 8 weeks postpartum we then start targeted strengthening of the pelvic floor muscles through functional exercises. When and how you find the right starting point for yourself is something you should assess entirely individually and discuss with a professional (midwife, trainer, doctor). It depends on how your pregnancy and the birth went, on your postpartum recovery process, and on your baseline fitness and mental health. A pelvic floor check-up is helpful for evaluating in detail how well your pelvic floor muscles function and how they work together with the other components of your deep core. On the basis of those results you can plan and build your training according to the FITT principle (Frequency, Intensity, Time, Type). I’m happy to help you with that.
You should wait at least 12 weeks postpartum before starting high-impact activity such as running or CrossFit. To prepare for these intense activities it is essential to do targeted strengthening of the muscles that stabilize your pelvis, in addition to the work on your deep core and on pressure management. That is exactly what we work on in my outdoor classes.