Evidence… considering many of the studies are done in ‘untrained college men’ or some similar population, a lot of the studies don’t hold much weight for me. Old studies performed in communist prison sport camps where they waterboard you if you stray from the study parameters seem more appealing.
I think climate and facilities play the biggest role. Everyone loves the Jamican, LSU, John Smith info but if you live in the Arctic circle and have no indoor facilities, yams, or grass, you might be barking up the wrong tree.
Put it this way…to me, real evidence is the guy who pumps out state champions like clockwork doing training that ‘published study evidence’ says is not ideal.