Pete Magill is such a buzz-kill. Our 5K Legend friend’s latest book, “SpeedRunner: 4 Weeks to Your Fastest Leg Speed in Any Sport,” warns against alcohol (it “damages the cells that produce testosterone and inhibits recovery and muscle adaptations”). He notes studies saying Kinesio Tape “was no better than sham taping/placebo.” He says xanax ice baths after workouts reduce long-term gains in muscle and strength. (And don’t get him started on chiropractors. He quotes one critic as saying: “If [spinal manipulative therapy] works, it shouldn’t be taking over a century to prove it.”) So what if I don’t drink, can’t…