apKick off the new year with this cardio kickboxing workout from celebrity trainer Jeanette Jenkinsa. Known as the Hollywood Trainer, Jeanette works with Pink and Alicia Keysa, among others, and she's put together a workout that will have you sweaty and breathless but with a smile throughout. Jeanette has you covered with modifications for all levels provided by her trainers: Ashley Joia, Liz Holtza, and Beth Alexandera.