An expert trainer and busy mom says this is the exact weekly workout routine she uses to build muscle, burn fat and save time

Rachael Sacerdoti sits in a loose workout jumper, shorts and shoes, stretching and smiling.

Welcome to Workout Diaries, a new series where we ask expert trainers to talk us through what a week of exercise looks like for them, helping you figure out how to develop and maintain an effective workout routine.

Rachael Sacerdoti is a personal trainer and wellness coach. She's also the founder of It's So Simple, a weight loss programme designed specifically for midlife women.