Blood pressure constantly changes to sustain basic bodily functions, from brain irrigation to muscle work. Exercise plays a central role because it modifies the body's demand in real time and also influences pressure over the medium term. However, the response is not the same for everyone and requires precautions based on each person's profile.
According to Infobae, citing an article from Harvard Health, the post-exercise moment deserves special attention because an additional drop in pressure can occur.
Training with Low Blood Pressure (Hypotension)
When values are consistently low, hypotension may appear. Although it may cause no symptoms in healthy people, in other cases it is associated with dizziness, fatigue, blurred vision, or fainting, especially when changing position or after physical activity.
Physical exertion raises pressure during activity, but the problem can appear afterward when pressure naturally drops, leading to post-exercise hypotension—a decrease that can reduce blood flow to the heart and brain.
Practical Recommendations
- Hydration: Dehydration worsens hypotension. It is recommended to maintain water intake spread throughout the day, as blood plasma is largely composed of water.
- Exercise Adaptation: Seated exercises (recumbent stationary bike, rowing machine) or horizontal positions (swimming) reduce the effect of blood pooling in the legs.
- Postural Caution: Avoid rapid postural changes and positions where the head is below the heart (such as certain yoga poses).
Training with High Blood Pressure (Hypertension)
Hypertension places greater strain on the cardiovascular system and increases the risk of events such as heart attack or stroke. However, regular physical activity is one of the most important tools for reducing cardiovascular risk.
The Heart Foundation recommends moderate-intensity aerobic activities, such as brisk walking, jogging, swimming, or cycling. Strength exercises with weights or body weight are suitable if performed at moderate intensity and without holding your breath.
Precautions to Consider
- Intensity: Very intense, short activities (maximal weightlifting, HIIT) may require prior medical evaluation.
- Medical Consultation: If you haven't been active for a while, it is essential to speak with a healthcare professional before starting.
What Happens to Blood Pressure During Training?
During activity, pressure usually increases because the cardiovascular system needs to pump more blood to the muscles. This rise is temporary and begins to drop once the effort ends.
A study published in the journal Medicine analyzed what happens after high-intensity exercise sessions in 21 healthy individuals (average age 22.2 years). A significant decrease in systolic blood pressure was found post-training. Furthermore, the magnitude of the immediate drop correlated with the reduction in blood pressure observed after 12 weeks of training, showing a clear connection between the body's acute response and its chronic effects.