Running can be counter productive

As running means that an increased proportion of your around 5 litres of blood circulates in your leg, it can be counterproductive both for warming up your forearms and for it's recovery. Clearly running is good for your heart in order to fight big overhangs but then it should be done in short intervals. Long distance running will just build up your capillary bed in your legs learning your blood circulation to redirect it from your forearms. The worst warming up is done, running or cycling, to your gym getting cold finger tips as you instead of opening up your capillaries, you close them learning your blood to avoid the forearms. Here are some more detailed thoughts and explinations from Dr 8a, Björn Alber, MSc Training physiology and one of the best kayaker in the world during the 80'ies. "All gyms and top climbers should have a kranking machine or a rower. This would make most us get better endurance.