This gluten-free grain is a source of magnesium, essential for energy production.
Unlike other grains, quinoa is a "complete protein", meaning it provides all the amino acid building blocks the body needs to make new proteins. This makes quinoa a great alternative to animal protein for vegetarians.
Try it in stuffed courgettes for a filling post-workout meal.
Sweet potato
If you're doing a high-intensity workout, such as a spin class, follow it up with a meal containing carbohydrate and protein, to refuel and help your muscles recover.
Sweet potato is a savvy choice, because it provides energising carbs, plus vitamin C and beta carotene, needed for maintaining healthy connective tissue.
Turkey
Not just for Christmas, turkey makes a great midweek meal all year.
This lean white meat is a top choice for anyone who's upping their activity, as it also contains B vitamins and selenium (which helps protect against tissue damage) and phosphorus (which helps harness food energy).
Turkey works well with a host of flavours - we love using it in meatballs and adding chopped kale for fibre. Serve with wholewheat pasta and a tomato sauce.
Black beans
Keep hunger at bay before your workout by including a fibre-rich food in your meal.
Black beans are a great source of fibre, and ideal for lunch.
Oats
Eating a decent breakfast is always important, but even more so when you're exercising.
Oats have a naturally low GI, so a bowl of them provides you with a slow and steady release of energy throughout the morning.
Oats also contain a soluble fibre called beta glucan that binds to cholesterol-containing bile in the gut, preventing it from being re-absorbed. Because of this, the body produces more bile from blood cholesterol, thereby lowering it.
If you're pressed for time in the morning, make overnight oats. Layer oats with 0 per cent fat natural Greek yogurt or skimmed milk, leave until morning, stir in berry compote and they're good to go.