Olympic lifts done for high reps can be extremely dangerous, especially for beginners — this can lead to injury. There is a big difference between good pain and bad pain. In CrossFit, you have an added element of the clock and time. When you’re racing against the clock and trying to get in as many reps as possible, you can end up injuring yourself.
Fix: Be smart and start with lighter weights, work your way up to perfect technique instead of worrying about how many reps you’re getting in before the lock stops at your box. Know the difference between good pain and bad pain.