Your Threshold is simply the hardest possible effort you can sustain for 60 minutes straight. Your average heart rate, power and pace for this effort is your threshold. To do a 60 minute all out effort is extremely challenging and is not necessary. A shorter 20 minute test can be done to establish your threshold.

Your Power and Heart Rate Training Zones are essential for you as an athlete to ensure that your truly making your hard days hard and your easy days easy. Establishing your zones will increase the efficacy of your training and prescribed workouts so that you are training at the right intensity levels for maximum results.