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It\u2019s the Versaclimber, folks: the most brutally effective piece of fitness equipment you\u2019ll ever use (but probably haven\u2019t). Most people don\u2019t know about it because no one talks about it, few use it, and gyms don\u2019t stock more than one if you\u2019re lucky. Is this because it\u2019s a useless piece of machinery? No. The Versaclimber is almost too good, too effective, too intense an experience for most people. The few that have used it almost invariably quit because it\u2019s so hard. And gyms don\u2019t have many because they can\u2019t convince people to use it, to actually go all out like they\u2019ve never gone all out before.

(This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Brock Armstrong)