Gyms have gone mad for these bits of neoprene. Yet researchers are still scrambling to catch up.
All the guidelines recommend paracetamol for pain relief despite the lack of evidence for the drug's effectiveness.
About 8% of the population is unable to metabolise codeine, and a small number metabolise it at a much larger extent.
Paracetamol is one of the most widely used medicines in Australia and around the world with millions of doses administered worldwide each day.