A fitness breakthrough is achieved when your power reaches or surpasses MPA for longer than 5 seconds during an activity. It typically represents a maximal effort. When a fitness breakthrough is seen in your data your fitness signature is extracted and updated. Most of the time, if your breakthrough included moments where your power exceeded MPA, you receive a medal and one or more of your Fitness Signature parameters increases. If you came very close but didn’t surpass your MPA, your Fitness Signature may decline. This is a near breakthrough, or colloquially a fakethrough.