Hello, YanV:

Generally, you will receive many well-thought responses to your inquiries on this forum. Nevertheless, did you notice Brett Jones' reply to your question? He is an RKC Master Instructor.

My daughter, Leah (RKC), son-in-law, Zachariah Salazar, (RKC TL), and I shared a house with Mr. Jones during my RKC Certification in Los Angeles, 2008. The man possesses more knowledge about Hardstyle kettlebell training, powerlifting, and CK-FMS (Take the course!!) than I could hope to absorb in 10 lifetimes--in my not-so-humble opinion.

I hope that's a compliment, Brett. :-)

Be well, and get stronger.