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power stretching

  1. Pavel Macek

    Other/Mixed 4 Weeks to Flexible Steel Challenge

    Jon Engum, StrongFirst Master SFG, Flexible Steel International founder & chief instructor, last week wrote: “Flexible Steel Challenge. This week I challenge KB5 one of the best gyms in the world to be Flexible Steel.” Thank you for your kind words, Jon - challenge of course accepted...
    • Pavel Macek
    • Thread
    • flexibility flexible steel mobility power stretching super-joints
    • Replies: 11
    • Forum: Discussion
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