There’s a big misconception that circulates the endurance community. This false idea is the idea that strength training in heavy rep ranges will make endurance athlete’s big and slow. Whether its runners, triathletes, rowers, or just about any other endurance athlete, it seems to be the prevailing notion that high repetition weight training and circuits are the only acceptable protocols to improve endurance performance through strength training. That’s not true and this is why even runners and endurance athletes need to devote time to strength in their personal training program.
Read this whole article on the benefits of strength training for endurance athletes.