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Table of Contents
What Is HIIT?
High-intensity interval training, commonly called HIIT, is a form of exercise that alternates periods of higher-effort activity with periods of lower-intensity movement or rest.
One reason HIIT has become popular is that interval-based exercise can be incorporated into relatively short exercise sessions. However, HIIT is not the only effective way to be physically active. The most appropriate form of exercise depends on an individual’s preferences, fitness level, abilities, health status, and goals.
For some people, walking, cycling, swimming, strength-based exercise, recreational activities, or other forms of movement may be more appropriate or enjoyable.
Why Consider Interval Training?
Adding variety to your physical activity routine can make movement more engaging and may help you develop a consistent exercise habit.
Interval training can also provide an opportunity to vary exercise intensity within a session. However, more intensity does not necessarily mean better results. Building a sustainable routine that you can participate in consistently is often more important than choosing the most challenging workout.
Your overall activity pattern matters more than any single workout.
How Does a HIIT Session Work?
A typical interval-based workout may include:
- A warm-up – Begin with several minutes of comfortable movement to gradually prepare your body for exercise.
- An interval of higher-effort movement – Perform an activity at a challenging intensity that is appropriate for your current fitness level.
- A recovery interval – Reduce the intensity or rest to allow your body to recover.
- Repeated intervals – Alternate periods of higher effort and recovery according to the structure of the workout.
- A cool-down – Finish with easier movement and allow your breathing and heart rate to gradually settle.
The duration and intensity of each interval can vary considerably. There is no single HIIT format that is appropriate for everyone.
A Simple Example of Interval Training
If you are already accustomed to regular physical activity, one simple approach is to alternate between periods of relatively faster movement and periods of easier movement.
For example:
- Begin with an easy warm-up.
- Increase your pace for a short interval.
- Return to an easier pace for recovery.
- Repeat the pattern several times.
- Finish with an easy cool-down.
The activity could be walking, cycling, swimming, or another form of movement that is appropriate for you.
You do not need to exercise at your maximum possible intensity for interval training to be useful.
Start at a Level That Feels Appropriate for You
If you are new to exercise, starting with very vigorous intervals may not be necessary.
Instead, consider establishing a regular movement routine first. You might begin with comfortable activities such as walking and gradually introduce changes in pace or intensity as your fitness and confidence develop.
Your starting point should reflect your current abilities rather than someone else’s workout.
Progress can involve gradually increasing the duration, frequency, or intensity of activity rather than trying to do everything at once.
Is HIIT Right for Everyone?
No exercise approach is appropriate for every person.
People who are new to vigorous exercise, have a medical condition, are recovering from an injury, are pregnant, have significant symptoms during physical activity, or have other health or safety concerns should consider discussing their planned activity with an appropriately qualified healthcare or exercise professional before beginning vigorous exercise.
If you experience concerning symptoms while exercising, stop the activity and seek appropriate medical advice.
When an individual’s needs are outside the scope of general lifestyle education, referral to an appropriately qualified professional is appropriate.
HIIT and Sustainable Healthy Habits
It is easy to focus on exercise as a way to achieve a particular physical outcome. A healthier approach is to consider physical activity as one part of an overall lifestyle.
Other foundations of healthy living can include:
- Regular movement throughout the day
- Adequate sleep
- Balanced, nourishing meals
- Stress-management practices
- Time for recovery
- Activities that you genuinely enjoy
- Consistent habits that fit your lifestyle
You don’t need to complete intense workouts every day to live an active lifestyle.
For many people, the best exercise routine is the one that is safe, enjoyable, realistic, and sustainable.
The Bottom Line
HIIT is one option for incorporating interval-based exercise into an active lifestyle. It can be adapted in many different ways, but the appropriate intensity and structure will vary from person to person.
Rather than searching for the hardest workout, focus on finding forms of movement that fit your current abilities, preferences, and lifestyle.
Consistency, appropriate progression, and safety are more important than simply exercising harder.
This article is intended for general educational purposes and is not individualized medical or exercise advice. If you have questions about whether vigorous exercise is appropriate for you, consult an appropriately qualified healthcare or exercise professional.
