Catching up on sleep at the weekend may actually be detrimental to a person’s health, a new study suggests. Previous studies have found that sleep duration is strongly linked with the risk of insulin resistance – the precursor for type 2 diabetes. So academics set out to examine the optimal amount of sleep each night to ward off insulin resistance. They also wanted to assess whether having more sleep at the weekend had an impact. Researchers from China examined data on more than 23,000 US