There may be times when you wake up in the morning feeling dizzy, experiencing a dull headache, or general weakness. Upon checking, you might notice that your blood pressure is unusually high. This is normal to some extent, as blood pressure naturally rises in the morning due to fluctuations influenced by the body’s circadian rhythm. This daily pattern usually peaks a few hours after waking but gradually stabilises as the day progresses. However, extremely high readings may indicate potential heart risks, including heart attacks and strokes.
How and Why Blood Pressure Changes
Blood pressure fluctuates throughout the day for everyone. Activity levels, medication timing, and overall health influence these changes. Typically, blood pressure is lowest during sleep and rises upon waking. This pattern is known as “dippers”.
Other patterns include “non-dippers”, where blood pressure remains almost the same at night and during the day. “Reverse dippers” experience higher readings at night and lower readings while awake. Understanding these patterns is important for monitoring cardiovascular health.
Factors That Cause Blood Pressure Rise
Doctors explain that the main reason for higher morning blood pressure is the body’s internal clock, or circadian rhythm. Hormonal changes during the night and morning contribute to a natural dip at night and a rise in the morning.
Several lifestyle and health factors can influence this pattern. These include sleep disturbances, shift work, meal timing, light and dark cycles, increased body inflammation, abnormal melatonin levels, environmental temperature, and noise.
Effect of Exercise Timing
Exercise can also affect blood pressure patterns, although results vary between individuals. Studies show that young women who work out in the morning have lower blood pressure than those who exercise at night. For men, evening workouts tend to result in lower blood pressure compared to morning sessions.
Risks of High Morning Blood Pressure
High blood pressure is harmful at any time. Elevated readings in the morning may increase the risk of heart attacks and strokes. Some studies suggest that significant nighttime dips may be a stronger signal of cardiovascular issues than morning surges.
A Silent Killer
High blood pressure is often called the silent killer because it usually develops without noticeable symptoms. Monitoring blood pressure regularly is essential, as it can prevent serious health complications.
Signs of High Blood Pressure
- Chest pain
- Dizziness
- Severe headaches
- Breathlessness
- Vision changes
