Sit-ups are great for strengthening the core but doing sit-up after sit-up gets a little boring and it's important to mix up the moves you use to train your core. With this in mind, we've found a ...

And even though there's an industry in making the best ergonomic chairs ... sit in any one way for long. That’s why constant ...

The chair is light, weighing just over 1 kilogram and is built to withstand up to 120 kilograms (261 pounds.) It costs £189 ($338) to pre-order on their Kickstarter. Lex is a wearable chair that ...