Program Design for Special Populations
The design framework
Build every program on mode, intensity, time, frequency, volume, and progression, anchored to baseline testing and the client goal. Then apply condition-specific adjustments. Key populations to know: cardiovascular disease and heart failure, hypertension, diabetes, obesity, osteoporosis, osteoarthritis, chronic obstructive pulmonary disease, older adults, pregnancy, cancer survivors, multiple sclerosis, spinal cord injury, stroke, and intellectual or developmental disability.
Adjustments that generate questions
Beta blockers blunt heart rate, so prescribe by RPE and talk test. Osteoporosis contraindicates loaded spinal flexion and rotation and high-impact work; emphasize extension, posture, and balance. Diabetes requires pre- and post-exercise glucose checks and carbohydrate availability, and avoidance of unsupervised late-evening exercise because of nocturnal hypoglycemia. Spinal cord injury above T6 carries autonomic dysreflexia and impaired thermoregulation risk; watch for pressure injuries. Multiple sclerosis calls for cooling and fatigue management. Pulmonary disease responds well to interval work, pursed-lip breathing, and a dyspnea scale. Avoid Valsalva maneuvers in cardiac and hypertensive clients.
Traps
Applying one-repetition maximum testing to uncontrolled hypertension or severe osteoporosis. Using 220 minus age with pacemakers or beta blockade. Defaulting to high-impact activity for a client with vertebral compression fractures. Forgetting the warm-up and cool-down for cardiac clients. Assuming all pregnant clients must abandon supine exercise; modify based on symptoms instead.
Rule of thumb
Start low and go slow. Begin resistance training at about 40 to 60 percent of estimated 1RM, one to two sets of 8 to 12 repetitions at RPE 11 to 13 on the 6 to 20 scale, and progress no more than 5 to 10 percent per week or when the client completes two extra repetitions with unchanged form.
Worked example
A 70-year-old with COPD and an FEV1 of 45 percent: treadmill intervals of 30 seconds work and 60 seconds rest, 20 to 30 minutes, three days per week, targeting a dyspnea of 3 to 4 out of 10, plus resistance training twice weekly.