Yesterday at the gym, I ran into an acquaintance, who has done marathons and triathlons, including an ironman. During the course of our small talk, he made an off-hand comment, “I think you’re not really running if you aren’t doing an 8 minute mile.” Oh, reeeee-aaaaa-lllll-yyyyy? I’d like to see him maintain an 8 minute per mile pace over 50 miles of rugged single-track trail that climbs 9,000 feet. I vehemently disagree with such arrogant and condescending pronouncements of who is and is not a runner. However, I figured in the interest of a quick conversation, I wouldn’t argue the …