“For me, I’ve always trained in an environment that I’m very comfortable in as I’d train in an elite gym with all the other athletes. But when I first went in and started lifting weight I felt like, “Ahh I don’t know what I’m doing” – so I absolutely get that so many women don’t want to go into the gym because they don’t know what they want to do and how to achieve it,” Ennis says.

For the gold-medal winner the answer is clear: knowledge equals confidence. “Because I’ve built up so much expertise over the years I go in very confident now because I know what I’m doing. Knowing what is the right technique for you and not being bothered what anyone is thinking will help you be confident,” she explains.

In a bid to help others improve their workout knowledge, Ennis has announced the launch of her new fitness app and website Jennis. The app not only gives members access to the athlete’s personal fitness methods, but also to her training programmes and wellness advice.

The workouts on the app can be used at home or in the gym, and Ennis says that one of her motivators behind creating the app was to help women to be more confident when it comes to fitness by learning techniques that she herself swears by.

Exclusive: Jessica Ennis says this is the way to find confidence in the gym