F3 Nation
F3 Nation, or F3, is a network of free, peer-led workouts for men in the United States with an estimated 40,000+ active participants. These participants can be found at approximately 2,600 workout locations in 39 different states. The F3 name is an initialism, which stands for fitness, fellowship and faith, referring to the group's three organizing principles. F3 has 5 "Core Principles" for their workouts. F3 is affiliated with FiA, or Females in Action, a network of free, peer-led workouts for women. Each man participating in an F3 workout is assigned a nickname which  he'll use during subsequent workouts. F3 began in 2011, in North Carolina, when two friends in Charlotte started a boot camp style workout for men. F3 participants apply a distinctive lexicon of terms during their workouts. For example, an informal group leader is known as a "Nantan," a term adopted from an Apache word meaning chief.