Submaximal exercise testing is safer and, in many cases, provides a reliable indicator of maximal effort.
- The workload can be measured in metabolic equivalents (METs).
Workload is a reflection of oxygen consumption and, hence, energy use.
- 1 MET is the equivalent of oxygen consumption at rest, or approximately 3.5 mL/kg/min.
- For example: If a person is exercising at a workload of 7 METs, he or she is consuming oxygen at a rate of 24.5 mL/kg/min
(7 MET x 3.5 mL/kg/min).
- Most activities of daily living (ADL) require a functional capacity of 5 METs.