The great Rickson Gracie sharing some knowledge on his workouts in nature.
From http://axissakadoamano.seesaa.net/
Build Sustainable Strength—Without Wrecking Your Joints, Energy, or Jiu-Jitsu
Tired of waking up sore and burnt out after lifting? Sloth Strength is a proven blueprint for grapplers over 35 who want to get stronger—without the pain, burnout, or injuries.
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