I exercise 5 days a week for 60 to 75 minutes (spinning class and then resistance training). I am 50. The last three years my creatinine level is slightly high and eGFRis slightly low. When I work out, I always sweat a lot and the smell is ammonia like. My blood pressure is normal; always less than 120/80.
While at stage 4 my eGFr was steady at 20% with creatinine at 300+, with very little exercise.
I started swimming again, at first just slowly about 500 meters and increased it by 500 meters every second week
I now swim 3.5km most days.
Since I’ve started swimming my eGFr dropped to 10% and creatinine is hovering about 500 which puts me at stage 5 but still not on dialysis and no sign of me starting it yet.
So to answer your question; Hell yes!!! It certainly has effected my eGFr analysis