Downsides of high intensity interval training (HIIT)

The Downside of High-Intensity Interval Training (HIIT). (Image via Pexels)
High intensity interval training (HIIT) has a few downsides. (Image via Pexels)

High intensity interval training (HIIT) has gained significant popularity in the fitness world due to its effectiveness in burning calories and improving cardiovascular fitness.

However, while HIIT offers numerous benefits, it also presents risks and considerations, particularly for beginners and inactive individuals. In this article, we explore the potential downsides of HIIT, emphasizing the importance of understanding one's fitness level and implementing proper precautions.


Adverse effects of HIIT

Increased risk of injury

Increased risk of injury (Image via Pexels)
Increased risk of injury (Image via Pexels)

HIIT workouts often involve intense, explosive movements and quick transitions between exercises.

For beginners and individuals who are not accustomed to regular physical activity, this high level of intensity can increase risk of musculoskeletal injuries like sprains, strains and joint problems.

Inadequate warm-up, poor form and excessive training volume without proper rest and recovery can further contribute to the likelihood of injuries.

Cardiovascular strain

The intense nature of HIIT places significant demands on the cardiovascular system.

For individuals with pre-existing cardiovascular conditions or those who're unfit, the rapid spikes in heart rate during HIIT sessions may pose a risk. Sudden increases in blood pressure and heart rate may lead to cardiovascular events, like heart attacks or arrhythmias.

It's crucial for individuals with underlying heart conditions to consult a healthcare professional before engaging in HIIT.

Overtraining and burnout

HIIT workouts are typically short but highly intense. While that can be advantageous for time-conscious individuals, it can also lead to overtraining and burnout, especially for beginners and inactive individuals.

Pushing the body to its limits too soon and without adequate recovery can exhaust the nervous system, disrupt hormonal balance and increase risk of chronic fatigue, decreased immune function and injuries.

Hence, it's essential to gradually build up fitness and allow for sufficient rest and recovery between HIIT sessions.

Psychological stress

The high intensity and demanding nature of HIIT workouts can lead to psychological stress, particularly for individuals not accustomed to intense exercise.

The pressure to perform at maximum capacity and fear of not meeting expectations can contribute to anxiety, self-doubt and negative self-perception. It's crucial to prioritize one's mental well-being and approach HIIT with a balanced mindset, focusing on enjoyment and personal progress rather than excessive intensity or competition.

Unsuitability for everyone

HIIT may not be suitable for everyone, especially for individuals with certain health conditions or physical limitations.

Pregnant women, individuals with chronic injuries or those recovering from surgeries may need to modify or avoid HIIT altogether. It's important to consult with a qualified fitness professional or healthcare provider to determine the appropriateness of HIIT based on individual circumstances.


While HIIT offers numerous benefits, including improved cardiovascular fitness and calorie burning, it's essential to understand the potential risks and considerations, particularly for beginners and inactive individuals.

The aforementioned tips can help mitigate the downsides of HIIT and ensure a positive and sustainable fitness journey. Remember that finding a balance that suits your fitness level and listening to your body are key to reaping the benefits of HIIT while minimizing the associated risks.

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