Your Threshold is the intensity level at which your body transitions from aerobic to anaerobic energy production.

  • Aerobic energy systems are used to produce energy for low-to-moderate exercise. They use oxygen and are fueled primarily by fat.
  • Anaerobic energy systems power moderate-to-intense exercise. They do not use oxygen and are fueled by carbs/sugar.

In Sixcycle you have three thresholds, one for heart rate, one for cycling power and one for running pace. 

When you create your Sixcycle account, an approximate threshold heart rate will be calculated for you using your age and sex. It is from this heart rate that your first set of zones is created. If you have a more accurate threshold heart rate from a field test, LT test, or VO2max test, you can enter it in place of the default threshold and new zones will automatically be created from the new threshold value. 

Similarly, at any time you can enter a cycling power threshold and your zones will be updated to include target wattages, and the Sixcycle Dynamic Zones will be turned on. 

A running pace threshold can also be entered, but the process is a little different:

  1. Click into the Running Threshold Box
  2. Select a distance
  3. Enter your best time for that Distance
  4. Click Submit

A threshold pace and target training paces will be calculated for you using industry standard formulas. As with the creation of a cycling power threshold, the Sixcycle Dynamic Zones will also be turned on.

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