( CNN ) -- To look at her , you 'd never know Jessica Ordona , 25 , has a problem with her jeans . `` I do n't like the fact that when you sit down , your stomach comes over them , '' she says . Jessica Ordona ( in white ) disliked the fit of her jeans , so she signed up for a class she says addressed the issue . A retail specialist with a commercial real estate firm in Bethesda , Maryland , Ordona knows image is part of success . That 's why she has been diligent about hitting the gym four to five times a week . But even with all her crunches and lifting , she sometimes experienced denim frustration . Unhappy with her former gym , Ordona decided to join a national health club chain in her neighborhood . Much to her surprise , she found a class called Skinny Jeans Workout , specifically designed to get rid of those annoying little bulges and bumps . `` It 's different than your typical workout class , '' she says . `` It 's not high-impact cardio , but you 're sweating the whole time because you 're working every muscle group . '' The Skinny Jeans Workout concentrates on core muscles , balance and posture . A cross between ballet , butt-burning stretches and light weight lifting , the workout involves the entire body . Lisa Grimmer , a group fitness instructor , teaches the class . `` What I love about Skinny Jeans is it takes everything from Pilates -- the core workout , which would be the tightening around of your abdominal muscles , your lower back . People think of that as `` the core . '' But there 's also the shoulder girdle , which we work out a lot in Skinny Jeans , too , '' says Grimmer . `` So really we 're thinking about anything that would be postural or placed into your jeans , so you 've got your abdominals , of course , and we work the inner and outer thighs that go into the jeans . '' The hourlong class is taught twice a week . Regulars swear they 've dropped a jeans size or two since the class began four months ago . They say it not only tightens the tush , but the workout also helps develop the flexibility and strength to hold the back straight . Tracy Cherpeski Bannister , another class instructor , believes posture is key to fitting into tight pants . `` In addition to sort of holding it in , we 're also lifting and lengthening and , as we do that , we sort of set our shoulders into place , '' Bannister says . `` I probably said it in class -- we 'tuck our shoulder blades into our back pockets ' -- so we 're opening the chest as well . '' Listen to Jessica talk about the class » . Bannister says so many of us spend portions of our day stressed , at our computer or rounded forward while driving . `` So this is a good way to kind of set the body back up . ... It makes everything more efficient , '' she says . The class is usually taught in bare feet , for maximum balance . It forces `` our bodies to be smarter , '' says Bannister . She reasons that by freeing up your feet , you have to use your brain as well . `` You have to think and feel what 's happening . If you do n't [ go barefoot ] , then it 's not a waste of time , but you do n't get as much out of it as maybe you should . '' Watch Skinny Jeans class participants in action » . But like any exercise program , it 's important to take it slowly . `` Any time you begin a new workout , you need to avoid doing too much , too soon . You do n't want to go from zero to 60 in 10 seconds , '' says Dr. David Johnson , an orthopedic surgeon at Washington Hospital Center in Washington , D.C. `` One of the worst things a person can do is start exercising , overdo it , get hurt and become discouraged . You should look to your instructor for guidance and make sure that person is keyed in to your fitness level . '' Johnson likes the concept of the workout . `` Exercises that develop the core muscles are important , '' he says . `` Not only does core strength decrease waist size , it increases your energy and endurance , which make it easier to engage in other physical activities such as golf , tennis -- even shopping for another pair of skinny jeans . '' The Skinny Jeans Workout and other programs similar to it can be found at health clubs across the country . While the specifics of the workouts may vary , depending on the health club , the goal is pretty much the same : It 's all about zipping yourself up into the smallest jeans in your closet . `` You do it right , you do it a few times , and then you 're set , '' Grimmer says . `` My clients love it . ... They all come to the class , and they 've seen such great results . I 've had people go down sizes in jeans ; I 've had people tighten up . ... They 're standing up a little bit taller , and everything 's straighter and very proud . ''
Skinny Jeans Workout tones core muscles so gym-goers can zip their skinny jeans . Balance , posture also addressed , as are flexibility and strength to hold back straight . Expert : Like any exercise program , it 's important to start slowly , not get injured .