Yeah...could be, Slick399...are you an athlete?....if so, try to do other tasks which will help to keep that endorphin rush going.....because that WILL help and sustain you throughout....Maybe pullups in the doorway? or just any activity....at this point will help you...Even punching the keys here at PC......WE are pretty good coaches...as probably you have seen.....but mostly 'in your ear' stuff ....
Try to keep from boredom......yes...