Different aspects of ageing

Ageing is a complex and continuous process that begins with birth and ends with death. It is a multi-dimensional process of biological, psychological and social changes. The age of a person is normally defined in years and months ( Chronological age is the age of a person measured in units (usually years) from birth to a given date. ), but there are also other aspects to age:

A person who is 57 years old according to his or her Chronological age is the age of a person measured in units (usually years) from birth to a given date. , may feel like a 50 year old ( Psychological age is how old one feels, acts and behaves. It is subjective and based on a person’s self-assessment. ), be fit like a 45 year old ( Functional age refers to a person’s functional fitness level, compared to others of his/her same chronological age and sex. ) and behave like a 40 year old ( Social age reflects cultural and societal expectations of how people should act at a certain age. It is an estimate of a person's capabilities in social situations that are relative to normal standards. ).

Changes that occur with ageing

People change as they get older. Attributes such as wisdom, strategic thinking and the ability to deliberate, either increase or first emerge with age. Work experience and expertise also accumulate with age. On the other hand, some functional capacities (mainly physical and sensory), decline as a result of the natural ageing process.

Age-related changes in functional capacities are not uniform because they are affected by various factors, such as:

• Environmental exposures, including workplace exposures;
• Genetic predisposition to illness;
• Lifestyle (nutrition, physical activity, tobacco and alcohol);
• Educational level and socioeconomic status; and
• Gender.

This means that there can be considerable differences in functional capacities between individuals with the same Chronological age is the age of a person measured in units (usually years) from birth to a given date. .