The training period that follows the Base Period. As an athlete progresses their work capacity for their sport, the training begins to look more and more like their sport. In the sport-specific period, the training looks almost identical to the sport. Climbers climb, runners run. And whatever sport the athlete is training for, the training is often recreations of subsets of the event at, and faster than, the event will be climbed or raced.  To give an example, a runner training to run a certain pace on a certain 100 mile course will, during this period, want to simulate (ideally on the actual course) parts of the race at, or very slightly, faster than their planned pace.