The median age for first marriage, which has gone up about a year every decade since the 1960s, has risen to 30.5 years for men and 28.1 years for women.

Berating someone is not considered emotional abuse.

One reason for co-habitation may be economic. 

 The testes manufacture testosterone, the hormone that stimulates the development of a male’s secondary sex characteristics and sperm, the male reproductive cells. 

Occasional exercise, such as the intermittent workouts of “weekend warriors” who are physically active just once or twice a week, can reduce the risk of dying of cancer, cardiovascular disease, or other causes.  

Body mass index (BMI), a ratio between weight and height, is a mathematical formula that has been shown to be a predictor of weight-related health concerns. The calculation is a person’s weight in kilograms divided by the square of height in meters.

Physical activity and exercise cannot prevent weight gain and improve health, and when combined with a low-fat diet, exercise helps preserve lean body mass, does not help keep off excess pounds, and promotes greater cardiovascular fitness.

Body composition refers to the distribution of fat-free mass and body fat in the human body. Fat-free mass includes bone, water, muscle, organs, and connective tissue. 

 The size of many popular restaurant and packaged foods has increased two to five times during the past 20 years. According to studies of appetite and satiety, people presented with larger portions eat up to 30 percent more than they otherwise would.

 Individuals with PTSD directly experience or witness a trauma, learn of an actual or threatened act of violence toward a family member or friend, or experience repeated or extreme exposure to the traumatic events (as happens with soldiers in combat and first responders).