Poor sleep can have a serious effect on memory and decision-making – hardly a recipe for success in business. Coaches need to be prepared to give some clients the ‘wake up’ call they need, says Vicki Culpin

  You may be shocked to hear that 17 hours of wakefulness can bring down a person’s level of alertness to the equivalent blood alcohol reading of 0.05%, a level that would break the legal drink-driving limit in more than 90 countries. Poor quality and quantity of sleep can have a dramatic impact, both personally and in the...