Cardiovascular Exercise Prescription for Healthy Adults

Exercise Dose and Intensity

The European Society of Cardiology recommends that healthy adults perform at least 150 minutes per week of moderate‑intensity or 75 minutes per week of vigorous‑intensity aerobic exercise; vigorous activity yields greater improvements in aerobic capacity and cardiovascular protection. 1
Moderate‑intensity aerobic activity is defined as 64–76 % of age‑predicted maximal heart rate (220 – age) and elicits a Borg rating of perceived exertion (RPE) of 12–13; the metabolic equivalent (MET) range is 3–5.9 METs (e.g., brisk walking at ~5 km/h). 1
Vigorous‑intensity aerobic activity is defined as 77–93 % of age‑predicted maximal heart rate, with an RPE of 14–16 and ≥6 METs (e.g., running, fast cycling >15 km/h, swimming). 1
The Praxis Medical Insights guideline notes that moderate intensity corresponds to 40–59 % of maximal VO₂. 2

For moderate intensity, the ESC advises 150–300 minutes per week, performed 30–60 minutes per day on ≥5 days; for vigorous intensity, 75–150 minutes per week, 20–30 minutes per day on 3–5 days. 1
A mixed‑intensity program can combine moderate and vigorous sessions in a 2:1 ratio (e.g., two 30‑minute brisk‑walk days plus two 20‑minute run days each week). 1
Exercise bouts can be accumulated in segments of at least 10 minutes to meet the weekly total. 1
Each session should begin with a gradual warm‑up and end with a cool‑down and stretching. 1

Initial phase (first 4–6 weeks): start at 40–50 % of maximal VO₂, with 10–15‑minute sessions; increase frequency according to symptoms and clinical status. 3
Improvement phase (up to 6 months): progress intensity stepwise to 50 %, 60 %, 70 %, and > 70 % of VO₂max if tolerated; extend session length to 15–20 minutes, up to 30 minutes when tolerated. Progression order: duration → frequency → intensity. 3
Maintenance phase (after 6 months): continue individualized training to preserve cardiovascular gains. 3

The American Heart Association identifies walking, running, cycling, swimming, aerobic dance, and elliptical training as the most effective aerobic activities for cardiac conditioning. 4
Acceptable alternatives include water aerobics and deep‑water walking. 4
Selecting activities that are enjoyable and well‑tolerated enhances long‑term adherence. 4

Perform 2–3 sessions per week of resistance exercise at 60–80 % of one‑rep max (1‑RM), completing 8–12 repetitions for 2–3 sets targeting major muscle groups (chest, shoulders, triceps, biceps, back, abdomen, legs). 4
The ESC also supports the same set‑and‑rep scheme for resistance work. 1

The ESC reports that the risk of acute cardiovascular events during physical activity is very low (approximately 5–17 sudden deaths per million persons per year). 1
The benefits of regular activity far outweigh the small participation risk. 1
Increases in any training component (frequency, duration, intensity) should be gradual to minimize overtraining, muscle soreness, injury, fatigue, and severe breathlessness; adjustments should be made if adverse symptoms appear. 1

For individuals on beta‑blockers, use perceived exertion (RPE) or the talk test rather than heart‑rate targets to gauge intensity, because beta‑blockers blunt heart‑rate responses. 2
Standard age‑predicted heart‑rate formulas may be misleading in this population. 2

The Praxis guideline advises that any amount of activity is beneficial, even if the 150‑minute weekly target is not met; start with a minimal amount and increase gradually. 2