This weeks spin class allows all of the riders to try 3x2 minute efforts, 1x10 minute, 5x1 minute and 5x20 seconds. One goal was to take the approximate average of the 3x2's and then hold 90% of that for the 10 minutes (pretty doable). Another goal was to use the 10 minute average power and be able to double that for the 30 second efforts (doable, but not easy). The one minute goal was to hold about 20-30% more than the two minute efforts. With the Keiser bikes it's possible to clear the data prior to each interval although you can't then save the entire ride or any of the individual efforts. Another reason to have a room full of Cycle-Ops Indoor 400 bikes, at triple the price of the Keisers unfortunately.