Coefficient of Friction

In terms of massage therapy the coefficient of friction is the resistance that the hands push against as they slide over the skin as shown in the schematic diagram below.

This resistance depends on the surface of the skin and hands respectively, and the massage product being used.

The massage therapist needs a high enough friction coefficient to perform the massage appropriately (e.g. warming the tissues, slightly stretching tightened fibres, etc.) but not too much friction so that the massage therapist expends unnecessary time and energy in massaging a high resistance product which does not necessarily assist the patient.

The coefficient of friction of massage products can be measured using an inclined plane and standardised weights. This test measurement is shown in the following picture.

With coefficient of friction information, along with feedback from massage therapists, Nutri-Pharm was able to develop a range of products with varying coefficients, thus suiting different tasks or preferences of individual therapists.

Rather than quote a specific coefficient of friction value, we have directly compared the Nutri-Pharm products with a high quality almond oil, used as a standard.  Thus the products are quoted as a percentage of almond oil’s friction coefficient.  A percentage less than 100% is “easier” to massage than almond oil (i.e. less resistance).  A percentage higher than 100% represents greater friction than almond oil, i.e. provides a firmer massage than almond oil. A comparison graph of Nutri-Pharm's massage oils and other compounds is shown below.