"As Beyoncé says: "Who runs the world. Girls." Unleash your inner strength with a sweaty, ladies only class, Fierce Girls, from the people behind the yoga studio Fierce Grace. Suitable for all levels, the class will put your body through its paces with a combination of yoga poses, including power and ashtanga yoga, bikram and classical hatha yoga. It lasts 80 minutes, with an optional 10 minutes of relaxation and meditation on top. Classes start on January 19 and run weekly (£15). New studios open this year in Beckenham, Kent, as well as Dublin, Paris and Stockholm"