While pounding on the treadmill day in and day out may work for some people, for others it is a torturous task that makes exercise nearly impossible to enjoy, let alone commit to. Enter 'Retrosweat'. Founded by former NIDA graduate Shannon Dooley, 30, the aerobics classes with a twist are all about 'making fitness fabulous'. Described as 'freestyle aerobic workout,' Retrosweat is inspired by the era of old-school VHS workouts made famous by Jane Fonda, and involves choreography to match the Eighties soundtrack. Scroll down for video . Getting physical: Shannon Dooley has founded 'Retrosweat' - an Eighties-inspired aerobics class in the style of Jane Fonda's iconic workouts . Skin and pins: Typical Retrosweat attire is all about showing off your legs in skimpy Eighties leotards . Pop it like it's hot: A Retrosweat class will have you popping, squatting and grinding to a retro soundtrack . A 50-minute workout, it has 12 dance tracks and Dooley regularly mixes up the soundtrack to keep people excited each week - and on their toes. 'There's a fusion of jogging, jumping, athletic movement and dance - and a lot of huffing and puffing' says Dooley. 'Basically there's a warm up, warm down, both high and medium impact movement that targets all areas of the body. 'There will be a leg track with squats and lunges and an arm track with push ups.' Eighties alter ego: Dooley says class goers  tend to adopt a complete alter ego as their costume collection grows . Iconic: Olivia Newton-John's aerobic anthem Let's Get Physical inspired many a skimpy lycra ensemble . 'Being freestyle though, I like to change up the tracks and let people request songs, but also give people the structure of the same key moves each week.' It also promises to have you 'sweating litres, laughing loads and getting buns of steel and a core to die for.' And according to Dooley, there's nothing else like it on the market. 'What makes it different is it's theatrical - people can come into a space that’s all about the 1980s and escape 2015 for an hour,' says Dooley. 'Not to mention being physically and creatively expressive while getting exercise they need.' And it's not just for those stuck in a Eighties time warp either. Tutti Frutti - In Summer Dooley adds 'Pineapple squat challenge' a modern take on a kettlebell workout . 'The demographic is quite wide. We have girls in their early twenties that come, ladies in their thirties, ladies in their forties who used to listen to Eighties music during high school, women in early sixties who are relieved freestyle movement is back and who used to do it five times a week in the Eighties.' 'Oh and we definitely have men come along too,  they love it.' Overall Dooley says people just like to come along because they love Eighties music, want to put an amazing costume on, feel fabulous - and release endorphins - 'It’s one big healthy party!' When asked where she got her inspiration,  surprisingly it wasn't from watching her mum do Jane Fonda workouts. Diva demographic: Dooley say there's no set demographic - attendees include men and women aged from their twenties to sixties . 'No strangely. My mum was actually an amazing tap dancer so while all my friends were in aerobics classes I watched my mum do tap exams,' says Dooley. 'She is though an amazing choreographer so that’s where I get my inspiration from.' As for attire? 'I wouldn’t turn away anyone who isn’t in a leotard,' laughs Dooley. 'But as people come back, gradually each week they will start to build collection. A leotard from eBay, leg warmers from American Apparel and after a while they build this whole alter ego and when then they will come in wearing a G-string leotard and no one will even blink.' On her own wardrobe, Dooley takes her job very seriously, admitting she's never worn the same outfit twice, 'an I've been teaching for three years - so yes my lycra costumes take up a whole room now' - (65 leotards to be precise). Fit and fun: Dooley says unlike  treadmill workouts, Retrosweat is about having fun and forgetting it's fitness . 'I like to set the standards through my face, hair and body so people feel invited to be themselves,' she says. Aside from the costumes, music and theatrics, Dooley also throws in some novelty competitions and spin off Seventies and Nineties classes to mix it up for regular aerobic goers. 'In summer, we do the pineapple squat challenge - so someone in the room will hold a pineapple in the squat track (which weighs about 2kgs) and it works just like a kettlebell, except your using the resistance of pineapple. Fonda fitspo: Dooley credits Jane Fonda as one of her main sources of inspiration behind Retrosweat . 'When we do Seventies class I will mix it up with a disco ball!' Dooley says the Seventies and Nineties nights she likes to throw in for good measure and to mix up the moves, as well as give herself a break from Eighties decade for a bit. 'Nineties goes off, we dance to fresh prince and that classic song ‘Sing hallelujah!’ So with all this fun and flair, how does the fitness measure up? 'For me, other than getting people to smile, escape life for an hour and enjoy themselves, the best feedback I get is about fitness. People will say, I lost four kilos and I didn't even notice!' says Dooley. 'My class is all about the simplicity of moves': Dooley says those with two left feet won't have any difficulty . 'A lot of exercise these days is scientific, counting reps and scooping protein powder. I respect that but that’s not me. My exercise has always been jumping on my bed and having fun, and I know there is a big group out there that has brains that work the same as mine,' says Dooley. 'People want variation, they want a ballad and they want to go nuts when the chorus hits. And the great thing about using songs is they're only 3.5-4 minutes long so there’s comfort in the fact you’re jumping up and down  but there's ‘just one more chorus’ and then we’ll be done.' So for Dooley it all just boils down to getting people excited and wanting to have a 'bodacious body.' 'I love seeing people improve their quality of life through the magic of music and star jumps - as sentimental as that sounds.' As for those with two left feet, Dooley says you won't have any trouble. Baby one more time: Every now and again a Seventies or Nineties class is thrown into the mix, which Dooley says 'go off' 'My class is all about the simplicity of moves. I think it's much more enjoyable to do simple moves well and enjoy it than struggle with something complicated and not enjoy it. So whether you've never danced or are a dancer who wants to keep their skills up,  Retrosweat is all about simplicity and completely inclusive.' And it seems this 'blast from the past' class is only growing. Dooley now runs additional side business 'Dial-a-sweat' where she takes hens parties for a class, and has travelled all around Sydney from Bowral, Newport and Kirrabilli overlooking the harbour bridge. And with two current locations in Alexandria and Surry Hills that run weekly (and Bondi for a while), Dooley believes the demand is strong and she already has her eyes on even bigger things. 'I want the whole world Retrosweating, that’s the plan.' 'And if I have too much make-up on and have sweat running on my face then that’s all part of it.'
'Retrosweat' aerobics classes allow attendees to 'forget 2015 for an hour' Classes dress up in skimpy leotards and work up a sweat to Eighties hits . Classes currently run in Sydney's Alexandria and Surry Hills . Founder Shannon Dooley also offers 'Dial-A-Sweat' class for hens parties .