Cross training, cross training, cross training. Successful runners and coaches can’t preach enough the benefits of incorporating other forms of activity into the training cycle for any race distance from the mile to an ultra marathon. One key component to any cross training regimen is strength training and we’re not talking about huge plates, grunting, and volumes of pouring sweat. For the runner, strength training is directed more to firming, toning, and building durability of certain muscle groups as well as increasing the efficiency of those muscles at removing and moving lactic acid. Here’s 10 exercises from Runner’s World Magazine that will enhance and improve your running ability when incorporated to training schedule on a weekly basis. 10 Essential Strength Exercises for Runners | Runner’s World.