I'm 6', 175 pounds, and my background is in rowing and kayaking, so I'm naturally a bit top-heavy. I've run eight marathons, and my best times have come during a three to four month training cycle when I ran so much that I didn't have time to lift weights. My shoulders and chest became scrawny, I lost weight down to 168, and felt scrawny and fast (like most pro marathoners look like).
Well, since every book says to lift, I've tried it. I lift every day I swim, right before I go in the pool. Three sets of 10 reps, three days a week or squats, calf raises, bench press, dumbell raises, and pull-ups (with weight added). I've got proper form, and it hasn't caused my any injuries, but I feel like the added bulk is making me a bit slower on the bike, and a lot slower on the run. I'm up to 178 pounds now, and slowing down every day.
I have a background of lifting weights, so I'm much stronger than your average 5'9", 135 pound marathoner. It may just be the summer heat, but I feel like every time I've spent months in the weight room, I slow down until I figure it out, then once I stop lifting weights, I get a lot faster.
How many of you have this same problem? Could lifting weights be detrimental to triathlon success?
Should I maybe keep the squats in the routine, and do away with everything else? Ironman is in about three months.