5. American Grit (Fox)
WWE Superstar John Cena hosts this brand new show, which pits teams of contestants against each other in military-training-inspired challenges (which may include grueling feats like holding a sandbar up for as long as possible, running through a forest and building a shelter, or alternating burpees and submerging yourself in ice water). Contestants are coached by four mentors from elite military units: one is a Navy SEAL, one a Purple Heart recipient, another a sniper who served in Iraq. No wonder the contestants do as they say.
Difficulty of workouts: 5
Credentials of hosts/trainers: 8
Gimmick factor: 3