Final answer:
For untrained individuals starting an exercise program, an ideal volume might be low intensity activities, while the duration could start at about 1 hour per day. Stroke volume should ideally be within a normal range of 55-100 mL, and heart rate at rest around 75 bpm. Keep in mind that biological variability will affect individuals' results differently.
Step-by-step explanation:
The ideal starting duration and volume of exercise for untrained individuals can vary based on numerous factors such as size of the heart, physical condition, and other personal variables. However, a sensible starting point for an exercise program might be low-intensity or skill-based activities with a volume tailored to individual capacity. As for duration, starting with moderate exercise for about 1 hour per day could be ideal, keeping in mind the normal range for stroke volume (SV) which is 55-100 mL and resting heart rate (HR) which averages around 75 bpm but can range from 60-100 bpm in individuals. Importantly, the total caloric expenditure should be between 50-100 kcal. Furthermore, each individual's results will vary; when examining outcomes like weight loss in an exercise program, variations can be attributed to biological variability.
For example, if 20 people begin the same workout program, the differences in weight loss outcomes can be attributed to individual biological variability. It is also important to review and be consistent with physical measurements, like evaluating the volume of objects or measuring exercise duration appropriately.