If you are looking for a real challenge, then try doing the RKC Plank. Invented by a former Soviet special forces trainer, Pavel Tsatsouline, the Russian Kettlebell Challenge or RKC plank is a ...

Staying still is hard work. Try holding a complex yoga pose or bracing through a plank, and tell me I'm wrong. You can really feel the burn without moving a muscle. Planks, which work muscles from ...

Planks can help work your core muscles, as well as your upper and lower body. There are different types of planks that may have slightly different benefits. The plank is a classic exercise that works ...

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