Boutique fitness studio Orangetheory aims to help gym-goers lose weight, get toned, and reach their fitness goals in the least amount of time through the use of heart rate data. Why is high intensity interval training so hot right now? And can competition make working out more enjoyable?

The green juice craze has taken off in recent years, earning endorsements from celebrities and wellness gurus alike. But does the hype match the health benefits? Health app Lifesum hopes to prove it can – it's used big data from 30,000 users to blend a juice tailored specifically to Londoners.

Setting unrealistic goals is something we all do, especially when it comes to self-improvement. We strive to be fitter, smarter, kinder, or to eat more healthily. But shaking off old habits is hard. Sometimes we don’t even get started. Can a step-by-step app, informed by behavioural science, come to our rescue?

With people now taking a proactive approach to their health, rather than a reactive one, a new report from Flurry Analytics shows that health and fitness apps are growing at a faster rate than the overall app market, and predicts an expansion in the wearable tech market too.