Store bought muffins are huge, and full of sugar and calories. That makes them a dessert, a treat, an indulgence - at which point you might as well get something tasty like a doughnut instead. Bonus: the doughnut probably has less sugar anyway.

Diet usually matters more for weight loss than exercise, but it turns out that Biggest Loser contestants who managed to keep the weight off have to exercise a lot. But if you and I aren't Biggest Loser contestants, does that mean anything for us?

If you're planning a trip to the US anytime soon, beware of what you eat. As this chart from Flowing Data demonstrates, the menus from popular US fast food chains are not for the faint (or chronic) of heart. Here's how the calorie damage compares at McDonald's, Carls Jr, KFC, Taco Bell, Subway, Burger King and more.

Food contains energy. Exercise requires energy. We feel great when we're full of energy. But are we talking about the same thing in all three sentences? We aren't, so let's clear up the confusion.

How many kilojoules are in your usual night at the bar? Doing maths with kilojoules is probably not part of your fun night out. Instead, here's a calculator that will give you a good estimate before (or after) the fact.

When you track calories to try to lose weight, some apps try to be helpful by giving you 'net calories', a number that takes your food and exercise into account. But this can be supremely confusing, and to make it worse, each app calculates it in their own way.

No matter what kind of approach you're taking to lose weight, there are a few common mistakes that will always undo all of your hard work. Here are five frequent mistakes you need to avoid.

Calorie/kJ counts are front-and-center on treadmill screens, food labels, and even restaurant menus. But if you're trying to lose weight (or just monitor how healthily you're eating), those numbers can be misleading.