Do a few weeks of exercise training cause large increases in maximal heart rate?

• A. No
• B. Yes
• C. Depends on age
• D. Only with high-intensity training

Answer: (A)

Maximal heart rate is largely determined by age and the heart’s intrinsic pacemaking system, not by short-term training. When you start exercising, your body adapts in ways that improve efficiency—your heart becomes better at pumping more blood per beat (larger stroke volume) and your muscles use oxygen more effectively—so you can work harder at submaximal levels without raising the peak heart rate. The ceiling of how fast your heart can beat at maximum effort doesn’t rise with a few weeks of training; if anything, it stays about the same and may even decrease slightly with long-term endurance adaptations. So a few weeks of exercise do not produce large increases in maximal heart rate.