CHAPTER 5 · FROM MY PT NOTES
How hard should this walk feel?
A treadmill speed is easy to write down. It doesn’t tell you how hard the person is working. I’d match the activity to their goal, then use more than one clue to judge the demand.
1. Start with the activity they need
If the goal is walking through the grocery store, a bike may help build aerobic capacity, but walking practice still matters. Work toward the needed time, turns, distance and recovery. A short walk with planned rests can be a useful starting point.
Choose a mode the person can access and perform appropriately. Warm-up and cool-down are part of planning. Review health history, symptoms, medications and any monitoring requirements before selecting the dose.
2. Heart rate, RPE or the talk test?
Heart rate is useful when its relationship to exercise demand is appropriate for the person. Age-predicted maximum heart rate is an estimate, not their measured maximum. Beta blockers and some conditions change the response.
RPE means rating of perceived exertion: ask how hard the effort feels using a clearly explained scale. Don’t mix the 0–10 and 6–20 scales.
The talk test is a practical clue: at moderate aerobic intensity, people can generally talk but not sing. It is not medical clearance or a substitute for required clinical monitoring. Stop and assess concerning symptoms such as chest discomfort, faintness or unusual severe breathlessness.
3. Understand the math without letting it prescribe
HRR = maximum heart rate − resting heart rate. Target HR = resting HR + a chosen fraction of HRR.
That example teaches arithmetic, not a target for every patient. Fifty percent of HRR is different from fifty percent of maximum HR. The choice of intensity needs clinical context.
A MET expresses an activity’s energy demand relative to a reference resting level. The same absolute activity can feel very different to two people. Progress time, frequency or intensity according to the goal and response; don’t increase everything together by default.
Before you move on
The heart rate is below an age-predicted zone, but the patient takes a beta blocker and feels very challenged. Push harder?
No. Review the medication effect, symptoms and appropriate monitoring plan. An estimated zone should not override the person’s response.
Does a higher walking speed always mean a better program?
No. A useful progression might be more total walking, fewer needed rests or practicing the route and demands that matter to the person.
Practice this chapter · 2 questions
Sources & learning scope
Based on these uploaded class references: 4 Cardiorespiratory Exercise; 2 Assessment and Prescription. Original explanations and examples; class slides and licensed assessment forms are not reproduced. Current reference links: CDC: measuring intensity · AHA: beta blockers and exercise. This is a concise student overview, not a complete treatment protocol. Apply skills within supervision, assessment findings and current precautions. Reviewed October 29, 2026.
