I wouldn&#x27;t entirely agree. If you aren&#x27;t lifting any relatively heavy, extra weights, e.g. running or something, warming up isn&#x27;t as important. However, when lifting relatively heavy weights, I think warming up is pretty important.<p>Warming up has the benefit of lubing up your joints. I think we&#x27;ve all had the instance where our body are relatively stiff and if we do, say, a push up, our joints pop or make cracking sounds. I remember squatting once when I didn&#x27;t fully warm up. My knee wanted to pop during the squat and it felt extremely uncomfortable trying to exert force on that leg. When there isn&#x27;t any extra weight, merely extending your leg with a pop wouldn&#x27;t bother anybody, but exerting a lot of force and doing so slowly sure wasn&#x27;t a pleasant experience. What are the chances of serious injury? I don&#x27;t know, but it hurt enough for me to not want to find out.<p>Another thing warming up helps with is to acclimate you to your working set weight. I know the first set of my bench press usually ends in a grinder and is the roughest out of all my sets. I&#x27;m not sure if it&#x27;s just my mind acclimating to the weight or a physiological thing like more blood getting pumped to my muscles. Either way, I&#x27;m fairly certain (but do not have any sources) injury rates would be increased if you tried to deadlift your max without properly warming up.