What to eat to boost your fitness

2. PhD Woman Natural Protein Bar

Made with whole foods such as plant proteins, seeds, and super greens, these new gluten-free, dairy-free bars are high in fibre and contain no added sugars, making them a great pre-workout snack. With two tasty flavours to choose from (apple & cinnamon or cocoa & berries), they really are a gym bag must-have.

£1.49, Boots stores