Would you Exercise in Vintage Activewear? According to Gen Z, Y2K Sportswear Is the Only Thing You Should Wear

An oversized coffee cup, rolled-up yoga mat and sunglasses big enough to swallow the majority of your face might sound like the latest edition of the typical Pilates uniform. However, spend enough time in a workout class or on social media with those born in the 21st century, and you’ll soon come to realise that the biggest athleisure movement isn’t about matching sets, trending leggings, covetable emotional support water bottles or even a chic pair of ankle weights.

Instead, the latest trend is to emulate Madonna’s gym outfits during her Confessions on a Dance Floor era, when she would run across London in three-stripe tracksuits and three-quarter length Ed Hardy shirts. Indeed, 2000s activewear is trending again in 2026.

What Is the 2000s Activewear Trend?

For those who don’t remember living through the noughties, the increase of strappy tank tops, slouchy low-rise flares, square-toe flip-flops and skin-tight spandex rendered in high-octane colours that are suddenly taking over your gym classes and social media feeds might seem like a novel trend on the rise. Yet, for those on the front lines when these styles were initially popular, you’ll realise just how rose-tinted the glasses that Gen Z must be wearing to revive Y2K sportswear.

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After all, this was a time before taking HIIT classes in dark rooms illuminated by fluorescent lights, cycling the French countryside from the comfort of your living room on your at-home Peloton or even knowing who Tracey Anderson was, let alone committing to her method. But on an aesthetic level, there’s something quite cool about the way people would dress to exercise during this decade.

Whilst still focusing on performance, there was less pressure placed on how you were styled and more attention directed towards how much gain you were making. As fashion writer Liana Satenstein so aptly pointed out on her Substack, this was a period where a simple grey t-shirt was regarded as an essential way to show off how much sweat you were producing, and by direct correlation, how fit you actually were. So, why is 2026 the right moment for 2000s activewear to be staging a comeback? More so, why are the noughties being mined for inspiration, especially when you consider the iconic aerobic gear worn by Jane Fonda in the ‘80s or off-duty bike shorts and baggy slogan sweater combination sported by Princess Diana in the ‘90s?

Why is 2000s Activewear Trending in 2026?

Mainly, it comes down to two factors—the influence of those who wore it then and those who are wearing it now. Helming this comeback are tastemakers like Isabella O’Day, the Los Angeles-based founder of archival-workoutwear brand Rummage Stretch, and Natalia Potts, the New York-based owner of vintage boutique Funny Pretty Nice.

With endorsements like these, it’s no longer considered unfashionable to wear old Lululemon capri leggings or a Nike tennis dress worn by Maria Sharapova during a US Open tournament. Nostalgia is certainly part of this renaissance, but there’s also an element of this trend that’s about disrupting the norm and encouraging a more personal approach to dressing for your Reformer class. Nothing truly does this better than the 2000s, especially when you consider just how vast the range of Y2K sportswear trends were prominent back then.