What is a runner's high?

You may have heard the term ‘runners high’ at some point in the past. This is the term given to the feeling of euphoria that is often associated with exercise. More specifically, it refers to the elation that is felt during or after a tough run.

What causes the runner’s high?

When you begin to run, a number of physiological changes occur in your body. Your heart begins to beat faster, your breathing rate increases, and more blood is delivered to the working muscles.

There is a surge of endorphins in your body, which are chemicals produced by the central nervous system (CNS) and pituitary gland. They get released into the bloodstream and may potentially give you an euphoric feeling.

Alongside this release of endorphins, there are also physiologies in the brain that cause the release of neurotransmitters, such as serotonin and dopamine, that give you feelings of happiness and motivation.

Some experts say that exercise also stimulates the release of molecules called endocannabinoids. These are chemicals that have natural pain-relieving and anxiety-reducing effects, which contribute to the runner’s high.

Unlike endorphins, endocannabinoids are able to cross the blood-brain barrier. They enter your brain tissue and provide calming effects as you run.

Long term effects of exercise

In regular exercisers, the hippocampus region of the brain (which is associated with memory and learning) can increase in size and density. This can lead to improved memory and focus.

Other potential long terms benefits of following a regular exercise program are:

• Enhanced mood
• Weight management
• Muscle gain and maintenance
• Reduced symptoms of anxiety
• Reduced symptoms of depression
• Improved flexibility
• Enhanced mobility
• Better immune system function
• Reduced risk of disease