Form is important to weight lifters because it helps them maximize the muscle building value of every rep while reducing the potential for injury. A study published in the Journal of Strength and Conditioning Research suggests that paying closer attention to footwork can help track and field athletes get more distance out of jumps.
Six elite sprinters took a series of standing long jumps with their feet parallel or slightly staggered. Force platform measurements indicated that even though muscle activation and knee angles at take-off didn't differ very much, a staggered stance produced 13.58 cm (5.34 inches) longer jumps on average. It turns out that toes to the line foot placement might not be aligned with your greatest performance.