In the early years of research into physical activity and health, job classification was a useful tool, but as the physical demands of occupations decreased, leisure-time physical activity became the dominant component of total activity.

Caspersen et al. (1985) identifies sub-categories of physical activity that include

In the article authored by Caspersen et al. (1985), coordination and balance are examples of

Proposing a biologically plausible mechanism(s) is not a requirement for making a causal claim.

A company’s ability to support varying rates of production is best described as:

Laboratory studies can encounter problems with

According to Lewis et al. (2016), men and women who engage in regular physical activity experience statistically significant increases in the risk of dying from coronary heart disease.

It takes the Blacksburg shipyard twenty six weeks with 500 workers to build a small tanker. Material costs are $32 million and overhead costs are $2 million. Workers cost $40 per hour including benefits and work 40 hours per week. The ship sells for $75 million. What is the multifactor productivity ratio?

Which of the following is a type of epidemiological study that is considered descriptive?

__________ quantifies the number of new occurrences of an outcome that develop during a specified time interval in the population at risk of experiencing the event during this period.