So my breastfeeding moms don’t be discouraged your not getting that muscle definition back. Once you stop breastfeeding the extra weight will come off if it hasn’t already and gaining your muscle will be easier.
You can also take protein but stay clear from creatine. Stick to 100% whey protein. Most protein powders add extra things and aren't safe. But the 100% whey one is just whey protein, which is fine.
Also, take note that if you begin to lift extremely heavy or workout intensely (by intensely I mean working your body 100%) and feel muscle soreness, there will be lactic acid build up in your muscles which can change the flavor of the milk temporally (this would only last for 1 feeding) . Some babies are sensitive to it, others don't care (If I got it, mine didn't). There is a debate about whether this is true but just thought I’d share incase your baby doesn’t like your milk after an intense workout and if you do experience It just make sure you don’t workout too close to a feeding or have a pumped bottle ready for your baby.
I hope this little blog made those moms who felt down about there bodies feel a bit better and gave hope. Your not alone and we are all struggling just stay motivated and workout because you’ll never regret a workout.