sounds exactly like applied kinesiology to me.  He might have called it something else, but it is the same type of method.

Basic Applied Kinesiology

AK practitioners monitor muscles to determine if stress is 'on line'. It is not about 'testing' the muscle in a proper sense, the important thing is the ability of the muscle (more precise: the ability of the autonomous nervous system) to respond in an appropriate way to the gentle pressure. AK patients have their muscles tested in many different functional positions, although the arm-pull-down test is the most common. Typically during the arm-pull-down test, AK patients lie down and raise their dominant arm. Next, the AK practitioner instructs the patient to resist as the tester exerts downward force on the subject's arm. The tester subjectively evaluates not the force exerted by the subject to determine the strength of the muscle, but the smoothness of the response. A smooth response is sometimes called 'a strong mucle' and a response that was not appropriate is sometimes called 'a weak response'. Please note: this is a figure of speech and not about muscle strength.

Because nearly all AK tests are subjective, many regard the practice with skepticism. The AK practitioner applies the pressure, but this practitioner is also the one who decides if one push is stronger than another. This is considered by some a conflict of interest: the AK practitioner will benefit if AK is perceived by the client as effective, but the AK practitioner is the one who actually determines how effective the practice has been, because he or she subjectively applies pressure to the patient's muscle or muscles. This weakness in the AK system allows for the possibility of fraudulent practice.

The arm-pull-down test is considered by the International College of Applied Kinesiology (I.C.A.K.) to be a very poor form of muscle testing. The arm-pull-down test involves so many different muscles that no specificity as to the muscle with the problem can be ascertained upon testing. Those who wish to become applied kinesiologists, are strongly advised and encouraged to take the 'touch for health' courses, in which the specific muscles and the precise positions for each muscle are explicitely taught.

Applied kinesiologists theorize that physical, chemical, and mental imbalances are associated with a lack of smoothness in the muscle response. So after a mucle that shows a 'weak' response (i.e. a non-appropriate response) many ways are open to find a way to restore the balance - for an imbalance is theorized to be responsible for a 'weak' response. After some form of treatment/ restoring balance has been applied, the muscle is again monitored, to evaluate the efficiacy of treatment.

AK nutrient testing appears to reflect the nervous system's efferent response to the stimulation of gustatory and olfactory nerve receptors by various tested substances. There is considerable evidence in the scientific literature of extensive efferent function throughout the body from stimulation of the gustatory and olfactory receptors.

For example, the tester might repeat the test with a particular substance under the subject's tongue; if the muscle tests weaker than the first test, that substance is determined to be harmful. The tester may also have the subject touch a particular body part with the opposite hand. For example, to "localize" testing to the heart, the subject would place a hand over the heart. A strong arm muscle test suggests a healthy heart, while a weak test suggests a problem. Instead of sublingual testing, some practitioners have the subject simply hold a substance or place the substance near a particular organ. Some AK practitioners go as far as to hold a sealed container of the substance to be tested on the forehead, chest, etc. and then perform the test.

Another commonly used technique in AK is to have the subject wear colored glasses (blue, green, red, etc.) and perform the muscle monitoring while wearing each color of glasses. The color that causes the greatest perceived smoothness of reaction gains might be a color that is in some way beneficiens to the client. There are many tests believed to reveal information about the subject's condition.