Workers say the executive was volatile and retaliated when they cooperated with an investigation. Apple denies the claims.Three circular bands came to define fitness on the Apple Watch.Credit...Dünzl/Ullstein Bild, via Getty ImagesApple Fitness Chief Accused of Toxic Workplace Culture and HarassmentWorkers say the executive was volatile and retaliated when they cooperated with an investigation. Apple denies the claims.Three circular bands came to define fitness on the Apple Watch.Credit...Dünzl/...