In a zero hours scenario, if cardiology is having a quiet day, the cardiologist might be asked to spend the day at home, unpaid, watching television or doing the gardening, rather than being paid by his or her NHS Trust for tidying the desk.

BBC: Zero hours contracts for NHS staff explained

There's nothing wrong with going to the gym of course, but the aim is to encourage everyone to build physical activity into their daily lives, such as by walking, cycling, swimming, gardening or doing any sport they enjoy.

BBC: Sedentary lifestyle can kill

The real problem is that people are wearing flip-flops while doing everything from skateboarding to gardening to running errands, Oswell said.

CNN: Flip-flops present feet with a painful problem