Yoga products are worth $27 billion annually in the US. And while it's true that the number of people practising yoga – predominantly women – has increased by 20% in recent years, that doesn't explain why sales of yoga wear are up 87%. Are yoga pants set to become the next Levi's 901s?

Women's fitness and wellness is an increasingly sexualised industry, characterised by an obsession with an enhanced physical appearance. But how do real women feel about the sexualisation of wellness? Could the allure of feeling sexy encourage more women to work out?

‘The post-workout look’ no longer means a red face and sweaty brow. Athletic fashion combines yoga pants with a moisture-wicking jacket, finished off with a pair of Nike Flyknits, and it's worn when out to lunch as well as in the gym. Is activewear become the new denim?

Ever wanted to wear your pyjamas to work? Once, people would have never dreamed of doing so, but wearing nightwear outside is growing in popularity. With fashion designers showing the look on catwalks, even celebrities like Rihanna have embraced the trend.