This is directed at anyone though I am very interested in reading Coach Sommer's opinion. Building the Gymnastic Body is an excellent book, for a beginner like myself it is a really good opportunity to get more Physically prepared for the rigours of sport.
On to the question: in the introduction Coach Sommer states that when he retired from Gymnastics and began to run and lift he was in great physical condition, even cardiovascularly. Later he states that Gymnastics imparts a high degree of GPP which is rarely attained in anything else. I can understand the obvious strength, power, agility, etc benefits gymnastics can provide, why do you think it provides such great cardio benefits also? running 20 miles on the spur of the moment is quite an accomplishment.
thank you for your time, looking forward to the rest of the books