Celebrity trainer, Valerie Waters, who has worked with Jennifer Garner for the past 15 years, gives some insight into how the actress and others get their fit bodies. According to Waters, you have to be disciplined like Garner and commit, plan ahead, eat clean, and eat breakfast.

Garner’s workout regimen is the result of years of knowledge that Waters has gained as a diet coach and trainer to the stars. Waters has previously suggested that making the routines count is paramount—she has reportedly spent years tweaking and evolving Garner’s workout according to her needs at the time and her work schedule.

Jennifer Garner’s workout typically combines cardio, weights, and something called the Valslide, presumably named after her trainer. The two have worked together since her Alias days.

The wonderful part of Garner’s workout is that it can be done at home, which she appreciates because it keeps her close to her kids and she doesn’t have to leave them behind for the sake of getting fit.