INSIDETRACKER

The pitch: Beat your personal best

Method: Blood

Time for results: 7 to 10 business days

Key players: Olympians, CrossFitters, ultramarathoners and triathletes, including Katrin Davidsdottir and Des LindenWhen you opt for the Ultimate + DNA + InnerAge Bundle, you’ll see how 261 genetic markers influence your athletic potential. The app also delivers custom recommendations to help boost endurance, prevent overtraining and avoid injury.

Professional long-distance runner Keira D’Amato, for example, used its insights to improve low cortisol and low ferritin (a protein that stores iron) from anemia, which hinders performance because not enough oxygen gets to the muscles. She’s now one of the country’s fastest female marathoners. $1,047