The average Brit only feels ‘fit as a fiddle’ nine times a month thanks to poor sleep, work stress and a lack of exercise, a study has found. Late nights, a poor diet and drinking too much alcohol mean less than a third of the year is spent feeling in tip top condition, both mentally and physically. Instead, the average adult will have three days a week where they feel tired or lacking in energy, and two occasions where they spend the day in a bad mood. More than one third of adults even have whole months go by where they don’t have a single day of feeling 'on top form'. The study by Vitabiotics’ Wellwoman and Wellman vitamin range also found January is the month most likely to see Brits struggling.