She regularly gives fans a glimpse at her gruelling fitness regime on Snapchat, and enjoyed another tough exercise session with her sister Khloe on Tuesday.
But it’s clear that all of Kourtney Kardashian’s intense workouts are paying off.
The 37-year-old showed off her toned stomach that afternoon as she took her eldest child, six-year-old son Mason, to an art class in Woodland Hills, California.
Kourtney displayed her impressive abs in an olive green sports bra and matching leggings which clung to her pert derriere.
The reality star pulled her long, dark into a ponytail and also sported grey APL ‘Ascend’ trainers and a colourful vented jacket which she wore unzipped.
Kourtney went incognito in a baseball cap from her sister Kim’s Kimoji range, which was white with the word ‘savage’ printed on it in a black speech bubble.
She slipped large aviator sunglasses over her make-up free face and carried a black leather handbag.
Little Mason looked cute in a Mario Bros. T-shirt, striped leggings and black trainers as he held onto his famous mother’s hand.