Breastfeeding & Sport

I have recently started to get back into playing sports, and I noticed slightly that my milk supply has decreased. I have been EBF my 6 month old. I have him on solids as well as breastmilk so he’s not just relying on milk alone. I was curious as to know if any other mummas have gone through the same thing, and how you got around it. Did you switch to formula? Or keep on with breastfeeding? Thanks.