For those of you who know muscle testing, this is already old news.  Muscle testing is a way of using our body to get information.  I learned muscle testing as a way to identify substances that I was allergic to and then could clear using different energy modalities (NAET, EFT, etc.)   I have since extended the same process to decision making.

I often am decisive, with clear input from my intuition and mind.  I know what I want and how to proceed.  Othertimes, I am indecisive.  I just don’t know what to do, I don’t have a clear “yes” or “no”.  I think these times are when my intuition and mind are at odds …. I have found if I check in with my gut, I can get a body signal that is very clear, and one that I’m willing to consider and trust.  (It’s probably just another way of trusting my intuition when my mind wants to rule.)

Try this:

Center yourself and close your eyes.
Say to yourself, “My name is ” and see what you notice in your body. 
Say to yourself, “My name is ” and see what you notice in your body.

I notice a tension and tightening for the false statement and a relaxing for a true statement.  Some folks get different sensations and some don’t notice a difference at first.
Sometimes there is a tension with the true statement.  That’s a sign that our polarity is reversed and can be easily corrected by doing a round of EFT.  Also, being hydrated can be important so if you aren’t getting a clear signal, have a sip of water.

Without knowing the science of muscle testing (and there are several views on this from biochemical to metaphysical), you can use body response to check in with yourself and your internal guidance.  Experiment with different situations where you aren’t sure, see what response you get, consider your options.  It’s another source of information, often overlooked, that can be combined with everything else you bring to your decisions.