Bodybuilding Bros on MSN
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, Pavel Tsatsouline, the Russian Kettlebell Challenge or RKC plank is a ...
21don MSN
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." ...
Rashelle Mason set an unofficial world record for the longest female forearm plank at 4 hours, 30 minutes, and 20 seconds. The previous record was 4 hours, 30 minutes, and 11 seconds, set by Donna ...
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