I wouldn't say it's anything to worry about... If you are doing it 3 times a week you are getting your work outs in . But seriously this isn't entirely abnormal. As long as it isn't causing any problems (i.e. you live on the upper floor and you move your furniture at 2 am waking your neighbors). If there are other obsessive tendencies as well then you may wanna discuss it with someone but I wouldn't be concerned too much at this point.