I have this strange pattern of gaining quite a bit of water weight (3-5 lbs) for several days after a hard workout. I know its temporary because 3 - 5 days later (not always), I am at an even lower bench mark after a few days rest. I know it isn’t muscle, because you don’t gain that over night.
I weight 221 lbs, 48 years old, 210 FTP, cycle 3500-5000 km a year. I am just wondering does anyone experience this? Any ideas why?