DOI: 10.36347/sjahss.2020.v08i03.005

Pages: 147-153

A young adult is generally a person in the age range of 20 to 39 (or 40), whereas an adolescent is a person aging from 13 to 19, although definitions and opinions, such as Erik Erikson's stages of human development, vary. The young adult stage in human development precedes middle adulthood. The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The Body Mass Index is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres. Thoughts, feelings and behaviours related to managing food and weight can begin to interfere with our everyday activities. When focus is too much on our bodies and our eating, these preoccupations can quickly lead to missed opportunities in other parts of our lives. Our personal, school or professional lives, not to mention our overall well-being, can be drastically affected. Food and weight preoccupation can also lead to severe physical and emotional problems. Affect balance refers to the emotions, moods and feelings a person has. This can be all positive, all negative or a combination of both positive and negative. Some research shows also that feelings of reward are separate from positive and negative affect. There is evidence that health and Subjective Wellbeing may mutually influence each other, as good health tends to be associated with greater happiness and a number of studies have found that positive emotions and optimism can have a beneficial influence on health.