3 common nutrition mistakes ruining your exercise - and how to fix them

3 common nutrition mistakes ruining your exercise - and how to fix themA top fitness guru has revealed three nutrition mistakes that could be ruining your exercise as Brits reach for the convenient optionCommentsNewsVicky Duncan16:27, 13 Apr 2026View 2 ImagesSimple mistakes could be stopping you from being your best(Image: Getty Images)A top fitness guru has revealed the three nutrition 'fails' people make before exercising. Sport and exercise specialist, Dr. Amos Ogunkoya GP spoke out following a survey of 2,000 adults who train at least twice-a-week, which found coffee, biscuits and even chocolate feature on the list of items many eat before the gym as it provides them with a 'sugar boost'.‌It revealed four in 10 confess they have no clue if what they're consuming is genuinely helping them train. But Dr Ogunkoya admitted it's all about timing, as all of the above can seriously affect a person's ability to workout efficiently and may even impact overall performance and development.‌View 2 ImagesPeople are clueless about what to eat to help boost their training(Image: Getty Images)‌He said: "For anyone trying to keep fit there is so much food related information out there it's hard to know exactly how to structure your exercise routine. You do not need anything complicated, but many people rely on guesswork when it comes to fuelling exercise.""In clinic and in sport, I commonly see three key pitfalls. These are training under-fuelled, relying on quick sugar fixes, and mistiming nutrition, all of which can impact performance."The study was commissioned by Flora as part of its partnership with the TCS London Marathon, which is going on a food tour offering free flapjacks and recipe inspiration across the UK.‌When choosing a pre-exercise snack most look for a quick energy boost, convenience or something that's easy to digest. As such, pasta, energy drinks like Red Bull or Monster and sweets appeared on th...