>...relaxing your jaw as much as you can is the first step in deeply relaxing the entire muscular system. I can see that as a relaxation method. But even while I'm sitting here at the desk, my teeth are lightly 'interlocked' (teeth aren't flat surfaces, there's grooves that mesh together). When I'm at the gym I notice My jaws are tight when I'm at the end reps of a set and exerting near max effort.