From a Google search I found this info: http://www.truthforhealthyliving.org/testrelat.htm
Communications and relationships that work (at work and elsewhere) involve interactions between people who are experiencing comfortable emotions and physical states. An uncomfortable emotional state such as anger with an uncomfortable physical state like a “tension headache” discourage getting along. The most direct cause of such discomfort is psychological stress: the biochemical response to an unknown perception of threat. To the point, the more stress you have the more your relationships suffer. The more your relationships or interpersonal communications are hurting, the greater the likelihood you will have even more stress.
It is often said that you are the sum of the people you are closest with. If your partner engages in physical activity, then you are more likely to pursue physical activity as well. A supportive partner is recognized as one of the most important aspects of starting a physical activity program.
Fitness and Nutrition Coach
I believe that the nature of a relationship with a partner has the greatest influence on the physical or mental health of an individual.
A healthy, loving relationship can do wonders for a person. In contrast, a problem there can be devastating.
As trainers, we usually are very well acquainted with those problems, and we see first hand the impact. Sometimes just an unintended bad phrase of words can upset a partner, not to speak of events like divorces or serious illnesses.