Recently, Mxsmanic posted:

bdl writes:

Physically draining... That better?

I guess so. Although I should think that IFR would be mentally
draining, rather than physically training. Of course, having to think
carefully for a few hours or risk hitting a mountainside can have side
effects that produce considerable fatigue over time.

Those are the least of one's concerns in IMC/IFR. Look up MEA to know why.

Neil