If you’ve ever wished for a little extra lift without relying on push-up bras or pricey procedures, you’re not alone. Enter the latest fitness trend taking over social media: the Kourtney Kardashian-approved ‘perky titty’ workout—a chest-focused routine promising to strengthen and sculpt the muscles around your bust for a natural lifting effect.But let’s be real—can a workout actually make your boobs look perkier, or is this just another internet-fueled fitness myth? We’re breaking down the science behind this viral routine, what it can (and can’t) do, and whether it’s worth adding to your upper-body day. Spoiler: The secret might just be in your posture and pectorals.What Can Exercise Really Do for Your Bust?In spite of what some might wish, breast tissue itself consists of fat and glandular tissue, so it cannot be "toned" like muscle. This is to say that no exercise—no matter how rigorous—will actually enlarge breasts. But that doesn't mean hope is completely lost.Underneath and around the breasts are the pectoralis major and minor muscles, which are essentially responsible for defining the chest. Targeting these muscles can give the illusion of a raised, fuller bust by enhancing overall definition, support, and posture. The workout's aim is not to enlarge cup size but to develop muscle and create the illusion of having a better-looking chest.You can't pump yourself up to larger, perkier breasts. But you can build strength in your pectoral muscles just behind and around the area. This Pilates-inspired, low-impact, high-rep workout routine recommended by Kourtney Kardashian targets the chest, shoulders, and upper body. Her workout combines Pilates-inspired movements that help build muscle endurance and alignment, which are primary considerations for obtaining a more defined, lifted chest region.While the exercise employs weighted bangles to maximize burn, the exercise can be done with or without weights. Hand weights of 1-3 pounds or resistance bands can also be employed to provide increased resistance and muscle stimulation.This form of upper body training assists in targeting pectoralis muscles, deltoids, and trapezius, which are all important factors in enhancing posture and upper body strength—ultimately providing the bust with a more lifted appearance.Whereas pectoral-defining chest exercises contribute to bust definition, posture is also, if not more, so influential on the look of your bust. Bad posture, such as slumping forward, tends to make shoulders appear rounded and bring about the illusion of sagging and deflated chests.Good posture not only enhances overall body positioning but also naturally makes the bust look better. An engaged core, back, and lifted spine produce a more upright and open chest, which makes the breasts fuller-looking.Most bodybuilding enthusiasts only pay attention to the strengthening process, ignoring the fact that recovery is just as important in building muscle and stretch. End the workout with a simple but effective stretches that will open up the chest, loosen tightness, and improve blood flow to the muscles.Does This Workout Really Work? Though this exercise won't make the bust larger like breast enhancement or changes in hormones would, it does provide real benefits for individuals wanting to improve the chest area naturally. Strengthening the muscles in the pectoralis, helping to improve posture, and targeting flexibility and alignment will allow for a more sculpted and lifted upper body.This exercise is especially helpful for:Individuals wanting to build upper body strength and staminaWomen looking to enhance posture and minimize slouchingIndividuals in search of a natural method of supporting and outlining the chest areaRealistic expectations, however—this routine will not increase breast size in any physical way, but will enhance muscle tone, support, and overall chest appearance.Should You Try It?If you’re looking for a non-invasive, workout-based approach to a more defined and lifted chest, Hot Pilates-inspired routine is a great option. It’s an effective way to build upper-body strength, enhance posture, and create a more sculpted look—all of which contribute to a more confident, lifted silhouette.So while you can't out-train gravity or genetics, you can definitely work with your body to accentuate its natural form—and that's what this viral exercise is actually all about.