New Delhi, March 28 -- If you thought Russian twists were Russia's only contribution to the fitness world, that's a gross underestimation of the country's impact on how we work out today. Notorious for their fitness, Russians seem to be especially obsessed with core workouts, and this is where a lesser-known technique stands out well above the twists. Called the Russian Kettlebell Club (RKC) plank, this move can make a significant difference to how your core looks and feels. The best part: you can use its principles in every other ab exercise, instantly increasing the level of difficulty which would translate into fewer but more effective reps for you.

While researching the exercise, I came across several sources stating that RKC stands ...