Exercise widow refers to a woman who spends little time with her husband because of his frequent and extended exercise sessions.
The exercise widow often wakes to an empty bed—a sure sign of a morning workout—and may find dinner plans spoiled by a sudden avoidance of anything heavy before a night run.
My husband...has become so obsessed with his exercise program that he has little time or energy for me. He goes to bed shortly after our children do and wakes up early to work out. I have talked to him about this. He makes an attempt to be with me, but then goes back to his routine.
The male equivalent is, of course, the exercise widower.
My fella just puts up with being an exercise widower now, although it's taken some time for him to accept that.