Health 23/02/2026 14:19

Why doctors say sleep should come before early morning exercise when the body isn’t ready?

Medical advice: When sleep matters more than a rushed early workout

For many people, early morning jogging represents discipline, vitality, and commitment to long-term health. The quiet streets, cooler air, and sense of accomplishment before the day begins make sunrise workouts deeply appealing. Countless health advocates praise morning exercise as a way to boost metabolism, sharpen mental focus, and build consistency.

However, recent medical discussions suggest that early morning jogging is not automatically beneficial for everyone. Under certain conditions — particularly when combined with insufficient sleep or unrecognized health issues — it may place unnecessary strain on the cardiovascular and nervous systems.

The message from doctors is not to avoid exercise. Instead, it is to approach exercise thoughtfully, understanding that timing, preparation, and overall health matter just as much as motivation.


Why the Early Morning Window Can Be Physically Demanding

When we wake up, the body is transitioning from a state of rest to activity. During this period:

  • Blood pressure naturally rises.

  • Heart rate begins to increase.

  • Stress hormones such as cortisol peak.

  • Blood circulation is still adjusting.

This physiological shift, sometimes referred to as the “morning surge,” is normal. For healthy individuals, it is rarely a problem. But for those with underlying cardiovascular risk factors, it may create vulnerability.

The early hours are also when stiffness is greater, hydration levels may be lower, and muscles have not yet warmed up from daily movement. Jumping directly into high-intensity jogging can amplify these stressors.


Mistake #1: Exercising After Inadequate Sleep

One of the most common and potentially harmful patterns is sacrificing sleep in order to maintain a strict early workout routine.

Sleep deprivation has measurable effects on the body, including:

  • Elevated blood pressure

  • Increased heart rate variability

  • Higher levels of stress hormones

  • Reduced oxygen efficiency

  • Greater systemic inflammation

When intense physical activity is layered on top of insufficient sleep, the cardiovascular system must work harder under unstable conditions. Chronic sleep restriction combined with vigorous exercise may increase strain on the heart, especially in individuals with preexisting risk factors.

Medical professionals increasingly emphasize that sleep is not optional — it is foundational. In many cases, gaining an additional hour of restorative sleep may be more protective for heart health than forcing an early run.

Cảnh báo kiệt sức do chạy bộ, làm gì để phòng ngừa?

Mistake #2: Skipping Warm-Up and Starting at High Intensity

Another common error is moving too quickly from rest to exertion. Many early joggers leave the house and begin running at a fast pace within minutes of waking.

In the early morning, muscles are tighter and circulation is slower. A sudden spike in effort can cause:

  • Sharp increases in heart rate

  • Sudden blood pressure changes

  • Muscle strains

  • Lightheadedness or imbalance

In high-risk individuals, abrupt intensity changes may elevate cardiovascular stress unnecessarily.

Doctors strongly recommend a gradual progression. Five to ten minutes of walking, dynamic stretching, or gentle movement allows the body to adjust before transitioning into jogging. Intensity should build progressively rather than abruptly.


Mistake #3: Ignoring Warning Signs

One of the most serious risks associated with early exercise is ignoring signals from the body.

Some individuals interpret symptoms such as dizziness or shortness of breath as a sign of “pushing through.” In reality, these may indicate that the body is under strain.

Warning signs that should never be ignored include:

  • Chest pressure or tightness

  • Unusual shortness of breath

  • Dizziness or faintness

  • Nausea accompanied by sweating

  • Sudden weakness

  • Blurred vision

While such symptoms are uncommon in healthy individuals, they require immediate attention if they occur. Listening to early signals is one of the most important aspects of safe exercise.


Who Should Be Especially Cautious?

Early morning jogging can be perfectly safe for many people. However, additional caution is advised for individuals who:

  • Are over the age of 40

  • Have high blood pressure

  • Have diabetes

  • Have a family history of heart disease

  • Experience chronic fatigue or stress

  • Sleep less than six to seven hours regularly

For these individuals, doctors may recommend moderate exercise later in the day when circulation is more stable and the body is fully awake.

Chạy bộ bao nhiêu có lợi cho sức khỏe nhất? - Tuổi Trẻ Online

The Role of Sleep in Heart Health

Sleep is not merely rest — it is active recovery. During sleep, the body:

  • Stabilizes heart rhythm

  • Regulates blood pressure

  • Repairs muscle tissue

  • Reduces inflammation

  • Restores hormonal balance

When sleep is shortened repeatedly, these restorative processes are interrupted. Over time, the combination of poor sleep and high stress may impact cardiovascular health.

If waking up early consistently means sacrificing sleep, experts often suggest shifting workouts to mid-morning, afternoon, or early evening.


How to Jog Safely in the Morning

For those who enjoy early workouts and feel energized by them, there are ways to reduce risk.

Medical recommendations include:

  • Prioritizing 7–8 hours of sleep

  • Hydrating before leaving the house

  • Performing a proper warm-up

  • Keeping intensity moderate

  • Avoiding extreme exertion on an empty stomach if feeling weak

  • Stopping immediately if unusual symptoms appear

  • Scheduling regular health checkups

Consistency, moderation, and preparation are far more important than intensity.

Chạy bộ và những lợi ích không ngờ với sức khỏe

Balance Over Extremes

Early morning jogging is not inherently dangerous. For many, it remains a powerful tool for physical and mental well-being. The concern arises when exercise is layered onto exhaustion, unmanaged health conditions, or unrealistic expectations.

Health is built on balance. Exercise should enhance resilience, not compete with recovery.

Sometimes, the healthiest decision is not the earliest alarm — but the extra hour of rest.

Listening to your body, respecting its limits, and aligning exercise with proper recovery may be the most sustainable approach to fitness.

Because in the long run, smart consistency protects the heart far better than intensity alone.

News in the same category

News Post