Start with a five-minute warm-up. Increase the pedal resistance and speed, and work out at 95 percent of your maximum intensity for 30 seconds. Lower the pedal resistance and speed for a 30-second recovery interval. Alternate between these two intensities for a total of 20 minutes. Finish with a five-minute cool-down. Experiment with different interval times for variety. Some recumbent bikes have built-in workout interval programs that automatically adjust the pedal resistance and prompt you to speed up or slow down your pedaling.