From total-body recruitment to pure lung-burn, these popular conditioning machines offer wildly different benefits. This ...

How to get abs? It all boils down to genetics. And planks. Six-pack abs are often held up as the pinnacle of fitness — if your middle shows those segmented muscles, you must be fit, right? Wrong. What ...

Your core supports every little thing you do. When walking, your abdominals are actively stabilizing your spine. In the gym back squatting, your core is making sure you don’t crumble under the weight.