Sled pushes and pulls build lower-body power and conditioning without the eccentric, or lowering, portion of the movement that causes most of the muscle soreness you'd get from squats or lunges, since there's no lowering phase to a sled push at all, just continuous concentric effort. That makes sleds ideal for high-frequency training and recovery days, where you want a genuinely hard training stimulus without adding the days of soreness that would interfere with your next heavy squat or deadlift session. Sled work suits athletes needing lower-body power and conditioning, lifters looking for a low-soreness way to add extra training volume, and anyone rehabbing an injury where eccentric loading is something to avoid for now. Program sled work in short, hard efforts, 20 to 40 meters per push or pull, with enough rest between rounds to keep quality high, since sled training is one of the most effective and time-efficient ways to build real work capacity. The most common mistake is going too light and turning what should be a hard, breathless effort into a casual walk that does little for conditioning or power. A second is neglecting sled pulls in favor of pushes only, when the pulling variation trains the posterior chain and grip in a way pushing alone doesn't touch.