ACSM-EP Special Populations 1 — Questions and Answers
Question 1: What is the ACSM-recommended minimum amount of moderate-intensity aerobic exercise per week for adults aged 65 and older?
- 75 minutes
- 60 minutes
- 150 minutes (Correct answer)
- 300 minutes
Correct answer: 150 minutes
ACSM recommends older adults accumulate at least 150 minutes of moderate-intensity aerobic activity per week, the same as for younger adults.
Older adults should accumulate at least 150 min/week of moderate-intensity aerobic activity (or 75 min of vigorous), in bouts of at least 10 minutes. 75 minutes is the vigorous-intensity equivalent, and 300 minutes is the upper range recommended for additional benefit. Those who cannot meet this should be as active as their abilities allow. ACSM also advises muscle-strengthening on 2 or more days and balance training on 2-3 days per week.
Question 2: Which exercise component is MOST important to add to an older adult's program specifically to reduce fall risk?
- High-intensity interval training
- Aquatic aerobic exercise only
- Neuromotor (balance) training such as tandem and single-leg stance (Correct answer)
- Seated resistance exercises exclusively
Correct answer: Neuromotor (balance) training such as tandem and single-leg stance
Balance (neuromotor) training, ideally combined with strengthening, directly targets the deficits that cause falls.
ACSM recommends multicomponent programs for older adults at risk of falling, including neuromotor exercise (balance, agility, proprioceptive training) 2-3 days per week along with progressive resistance training. Balance training has the strongest evidence for reducing falls. High-intensity intervals, water-only exercise, and seated-only strengthening do not train balance on a stable-to-unstable progression. Flexibility is useful for range of motion but is not the main fall-prevention component.
Question 3: According to ACSM guidelines, what is the recommended exercise intensity for pregnant women without contraindications?
- Light intensity only (RPE 9-10)
- Vigorous intensity only (RPE 16-18)
- Aerobic exercise is contraindicated during pregnancy
- Moderate intensity (RPE 12-14) (Correct answer)
Correct answer: Moderate intensity (RPE 12-14)
Pregnant women without contraindications should perform moderate-intensity aerobic exercise (RPE 12-14), at least 150 minutes per week.
ACSM recommends at least 150 min/week of moderate-intensity aerobic activity (RPE about 12-14) for pregnant women without obstetric or medical contraindications. Light-only prescriptions underuse the benefit, and vigorous-only prescriptions are not advised for those not previously active. Exercise is not contraindicated in healthy pregnancies. Avoid supine exercise after the first trimester, activities with fall or contact risk, and heat stress; stop for vaginal bleeding, dizziness, or chest pain.
Question 4: An 8-year-old child wants to begin a resistance training program. Which approach is MOST appropriate?
- Heavy loads with low repetitions to build maximal strength
- Standard adult protocols with proportionally reduced weight
- Resistance training is contraindicated in children under 12
- Body weight and light loads emphasizing proper technique (Correct answer)
Correct answer: Body weight and light loads emphasizing proper technique
Children should begin with body weight and light loads and focus on technique under qualified supervision.
Youth resistance training is safe and beneficial when it is supervised and technique-focused, starting with body weight or light loads and 1-2 sets of 8-15 repetitions, 2-3 non-consecutive days per week. Maximal-effort lifting and adult protocols increase injury risk before the child can control technique. The belief that training stunts growth or is contraindicated before age 12 is not supported by evidence. Progression should be gradual and based on mastery of form.
Question 5: What is the primary safety concern when prescribing aerobic exercise for a client with type 2 diabetes who uses insulin?
- Reduced cardiovascular adaptations to training
- Excessive muscle glycogen depletion
- Hypoglycemia during and after exercise (Correct answer)
- Inability to achieve target heart rate
Correct answer: Hypoglycemia during and after exercise
Insulin plus exercise-enhanced glucose uptake can cause hypoglycemia during and for hours after exercise.
Insulin and exercise both lower blood glucose, so clients on insulin (or sulfonylureas) can become hypoglycemic during exercise and up to 24 hours afterward. Check glucose before exercise (if below 100 mg/dL, ingest carbohydrate; avoid exercise if above 250 mg/dL with ketones), carry fast-acting carbohydrate, and consider adjusting insulin doses. Cardiovascular adaptations still occur in diabetes, and glycogen depletion and target heart rate are secondary concerns.
Question 6: For a client with hypertension, which exercise mode has the strongest evidence as a first-line intervention to lower blood pressure?
- Isometric handgrip training at maximal effort
- Moderate-intensity aerobic exercise (Correct answer)
- Heavy resistance training with the Valsalva maneuver
- High-intensity interval training exclusively
Correct answer: Moderate-intensity aerobic exercise
Regular moderate-intensity aerobic exercise lowers resting systolic and diastolic pressure and is the primary ACSM recommendation.
ACSM recommends most days of the week of moderate-intensity aerobic exercise (30 or more minutes, 150 or more minutes per week) as the primary mode for hypertension, producing reductions of roughly 5-8 mm Hg. Resistance training is a complement at moderate loads. Maximal-effort isometrics and Valsalva during heavy lifting cause abrupt pressure spikes and should be avoided, and exclusive interval training is not the first-line prescription.
Question 7: Which exercise mode is MOST effective for improving bone mineral density in clients with osteoporosis?
- Swimming and aquatic exercise
- Recumbent cycling
- Yoga and stretching only
- Weight-bearing and resistance exercises (Correct answer)
Correct answer: Weight-bearing and resistance exercises
Weight-bearing and resistance exercises apply mechanical load that stimulates bone formation.
Bone adapts to mechanical load (Wolff's law), so weight-bearing aerobic exercise (walking) and progressive resistance training are recommended to maintain or improve BMD. Swimming and cycling are non-weight-bearing and have minimal osteogenic effect. Stretching alone does not load bone. Clients with osteoporosis should avoid loaded spinal flexion and high-impact or twisting movements and should add balance work to reduce falls.
