The most common weight-training injuries are those related to the use of poor exercise technique. Incorrect technique can pull, rip or wrench a muscle or tear delicate connective tissue quicker than you can strike a match. An out-of-control barbell or stray dumbbell can wreak havoc in an instant. Each human body has very specific biomechanical pathways. Arms and legs can only move in certain ways, particularly if you're stress-loading a limb with weight. Strive to become a technical perfectionist and respect the integrity of the exercise —no twisting, turning or contorting while pushing a weight. Either make the rep using perfect technique or miss the weight. Learn how to miss a rep safely; learn how to bail out.