As a follow-up to my post about the frog system and body
type, there is a similar article in the current Nylon Highway
assessing the Mitchell
system: <http://www.caves.org/section/vertical/nh/56/nh56.html>.
There is a very good article about the frog ascending
system in the current issue (no. 222) of Descent, the British
caving magazine. <http://www.wildplaces.co.uk/index.html> It
discusses the inherent efficiencies of using the frog system based
on different body types. As many have suspected, people that are
barrel chested and/or have relatively low waist to fingertip length
are at a disadvantage when using the frog, even if their technique
is good. Essentially the same article is available at
<http://www.johncharleswoods.net/pages/cavetech.htm> under
"Typecasting the vertical caver Part I" as well as in Nylon Highway
no .53 (2008) <http://www.caves.org/section/vertical/nh/53/nh53.html>.
Mark Minton
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