Gym-goers are going crazy for these products. It's time for a reality check.
There are concerns that performance-enhancing drug use is quickly becoming a public health crisis.
A condition where our muscles break down and leak into the bloodstream is usually caused by trauma. But high-intensity resistance training, like Crossfit, means it's on the rise.
The first article in our series on urban sports looks at how CrossFit has given gruelling exercise a corporate makeover – and why that might be a good thing.