Before you reach for the chocolate bar or packet of crisps, try these energy boosters instead.
The energy boost of a sugary snack wears off quickly. Instead, have fresh fruit, dried fruit or nuts, which are a healthy and long-lasting source of energy. If you must have chocolate, choose a few squares of good-quality plain chocolate. It contains less sugar and the richness means that you need less to feel satisfied.
Hunching over a computer all day can leave you tired and aching. Make sure you're sitting correctly at your desk. Take regular breaks, at least once an hour: get up, move around and stretch your legs. A few deep breaths and stretches will boost your circulation and help to wake you up.
If you don't drink enough water you'll feel sleepy, be less able to concentrate, and you may get headaches. When you feel hungry you're often actually thirsty. Don't wait to feel thirsty to have a drink. Keep a filled bottle of water on your desk, so that you're more likely to drink regularly, and can see if you're drinking enough. For more information, read about diet and fluids.
Changing work focus
When your work pile seems endless, it can be easy to lose enthusiasm and slip into an energy slump. Breaking your "to do" list into small, manageable tasks and taking a short break after each one will help you stay focused. Leave the simple jobs for early afternoon so that you don't have to concentrate too hard.
Article provided by NHS Choices