If your workout consists of heavy lifting and your pre-workout consists of a 200M run and a couple of air squats, it may be time to adjust your regimen.
As every weightlifter understands, doing full snatches, clean and jerks or any heavy lift, requires a high degree of flexibility in every part of the body. All the major muscle groups and corresponding attachments are involved in competitive lifts: shoulder girdle, back, and hips and legs. A lack of flexibility in the shoulders will prevent the lifter from locking out snatches and jerks. It may also keep one from racking a weight on his shoulders while cleaning. Tightness in the hips will have an adverse affect on getting into a low position for snatches and cleans. Not only preventing in correct execution of a lift, lack of flexibility in any heavy lift makes one more susceptible to injury.
Because every part of the body is activated during the execution of Olympic lifts, every joint and muscle group needs to be given some attention before doing any heavy lifting. This is where there is confusion between the two disciplines needed to enhance flexibility: warming up and stretching. While closely related, they are not the same. Merely stretching a muscle or joint isn’t sufficient preparation for a heavy session in the weight room that will be filled with complicated athletic movements.
In final, warming up and stretching are both vital disciplines for all heavy lifters. Everyone knows a warm muscle is more elastic and reacts better to movement than a cold one. And it’s only common sense to know supple muscles are less prone to injury than tight ones.