I work out at my appartment complex right now, ( can't afford a gym) so I use a pretty crappy set of nautles machines that only provide two or three excersis each and no free weights out of the four machins I make my decicin based on what I hope are diffrent muscle groups and do my routine on each machine, along with sit ups, lundges and streaching in between I also ab roll or do sit ups am and pm for 5min.