I attend an exercise class (Mon and Wed=weight training and Tues and Thurs=step aerobics), but we take the month of December off..........so, when I can't go to class and on weekends, I warm up for 20 minutes on my NordicTrak Walkfit, then I do 30 minutes of step aerobics. I have 2 step tapes that I really love. Lately, I've become addicted to step aerobics !