Why Am I Feeling Sleepy Or Getting Tired Quickly During Workout?

  • 4 months ago
3 minute read.
Why Am I Feeling Sleepy Or Getting Tired Quickly During Workout?

Have you ever found yourself feeling sleepy or even nodding off during a workout? Do you often find yourself struggling to muster the energy to complete your exercises or stick to your fitness routine? If so, you are not alone.

Feeling tired or lethargic during a workout is a common problem that many people face. It can be frustrating and demotivating, leaving you feeling discouraged and wondering how to break the cycle. Fortunately, there are a few simple strategies you can use to combat this issue and keep your energy levels up throughout your workout.

By taking a closer look at your sleep habits, diet, warm-up routine, exercise regimen, and workout intensity, you can identify the underlying factors that may be contributing to your fatigue. Whether you need to prioritize rest, fuel your body with the right nutrients, incorporate new exercises into your routine, or take breaks when needed, there are various ways to combat sluggishness and stay energized.

In this blog post, we'll explore reasons why you might feel sleepy during a workout.

Sleep Deficiency

Feeling sleepy during a workout could be a sign of sleep deficiency. If you're not getting enough restful sleep at night, you may feel tired and sluggish during the day. It can make it hard to stay focused and energized during a workout.

To improve your sleep try establishing a regular sleep schedule and sticking to it as much as possible. Create a relaxing bedtime routine, avoid screens for at least an hour before bed, and make sure your sleeping environment is cold, dark, and quiet.

[Also check: Bedtime stretches to promote good sleep]


When your body loses more fluids than it takes in you are dehydrated. Your body sweats to regulate its temperature as you exercise. You can become dehydrated if you don't drink enough water to replace the fluids you are losing. Dehydration can lead to fatigue, weakness, and dizziness, all of which can make you feel sleepy during exercise.

To avoid dehydration during exercise, make sure to drink plenty of water before, during, and after your workout. A good rule of thumb is to drink at least eight ounces of water every 15-20 minutes while exercising.

[You may also like: How much water should you drink during workout?]

Not taking enough carbs

It is crucial for those who work out to lose weight. While you must burn more calories than you consume to lose weight, you must also consume enough calories (carbs) to fuel your workouts and burn calories in the gym.

Diet Plan

If you're having trouble with your workouts and are dieting, try increasing your calorie and carb consumption (seriously, avoid any extremely low-carb ketogenic diets). To maintain a healthy level of energy, you should consume 1,200 to 1,400 calories per day.

[Also check: What to eat before & after workout]

A drop in pH

During high-intensity activity, your body turns carbohydrates into fuel, and the byproducts are hydrogen ions. The more you push it, the more they can collect in your system.

As a result, the pH of your body drops and becomes more acidic. Lactic acid was once blamed for this lactate can help fuel your workout. As your body becomes acidic and everything slows down. The enzymes that provide energy to your muscles all become less efficient.

Start working out without warm-up

Starting a workout without a proper warm-up can also contribute to feeling sleepy during exercise. When you jump into an intense workout without preparing your body, it can be a shock to your system. It can result in weariness, muscle aches, and even injury.

Skipping a warm-up can also cause your heart rate to spike too quickly, which leads to dizziness, shortness of breath, and other symptoms. It can make it hard to maintain your energy levels and focus during your workout, leading to feelings of sleepiness. To avoid feeling sleepy during exercise, always start with a proper warm-up. Even if you're short on time, take a few minutes to get your body moving and your blood flowing.

[Also related: Workout burnout? Exercise smarter]


Sleepiness during exercise can be a frustrating experience caused by various factors. Lack of sleep, dehydration, and poor nutrition are all potential culprits. However, there are several steps you can take to prevent feeling sleepy during your workout, such as ensuring you're well-rested, staying hydrated, fueling your body with proper nutrition, and avoiding certain medications before exercising.

Additionally, it's essential to listen to your body and adjust your workout intensity or schedule accordingly if you are feeling excessively tired. By taking these steps, you can help ensure that you are getting the most out of your workouts while avoiding the unpleasant experience of feeling sleepy or fatigued.

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