A general discussion of functional SWAT training brings us to a discussion of Practical Applied Stress Training (P.A.S.T) concepts. P.A.S.T is not specifically a general physical preparedness program for tactical law enforcement, but more an adjunct to it.
It's common practice for SWAT teams to train diligently in their firearms skills and tactics, while hitting the gym or the road as a separate training rotation. P.A.S.T attempts to bridge that reality and parallel what a real incident may demand, which is a combination of shooting proficiency, as well as anaerobic and aerobic fitness. The only way to perform in such a situation is to have experienced the effects of physical and mental stress on marksmanship skills and test whether or not your job-specific fitness and shooting skills are up to the task.
Even the most advanced shooter in great physical condition will find his or her marksmanship severely degraded when forced to shoot under intense physical stress. As expected, the operator who is not in adequate physical condition to begin with can expect to see his or her marksmanship go completely to hell when put under physical and mental stress.
P.A.S.T focuses on functional strength, improving body-weight-to-strength ratios, dealing with unbalanced loads, and overall fitness and conditioning combined with shooting rotations. P.A.S.T prepares SWAT operators to perform efficiently under worst case scenarios.
Unfortunately, it's often the case that PT-related training and marksmanship don't come together until the officer is in the middle of a life-and-death situation, where his or her ability to perform is tested as never before and the outcome is unsure. Thus the trend toward more functional style training in the tactical community should be encouraged, and P.A.S.T adds a dimension to the training of tactical law enforcement not duplicated by other programs.