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RKC plank: How to do it perfectly to build stronger arms and core

If you are looking for a real challenge, then try doing the RKC Plank. Invented by a former Soviet special forces trainer, ...

I did a Copenhagen plank nearly every day for a month. These were the 3 biggest changes I noticed.

Why one trainer calls the plank variation "no joke." ...
Health

11 Exercises for Boosting Strength and Fitness That Are Lower Impact Than Burpees

Burpees are a popular exercise, but they can put a lot of stress on your joints. You can swap burpees for other lower-impact ...