HIIT vs. LISS: which cardio method suits you better?

When it comes to cardio training, you often come across two terms: HIIT (high-intensity interval training) and LISS (low-intensity, steady-state training). Both training methods have their advantages, but which is best suited for you and your fitness goals? In this article I'll show you the differences between HIIT and LISS, so you can decide which method better fits your lifestyle and your goals.

Before we begin, I'd like to briefly introduce myself: my name is Marco Laterza, I'm a personal trainer in Zurich. I offer my clients support in the areas of exercise, nutrition and mindset. A holistic approach to health and fitness is important to me, and this is a concept I want to pass on to everyone. If you're interested in working together, you can contact me anytime.

What is HIIT?

HIIT stands for "high-intensity interval training" and is a training approach in which short, very intense phases of effort alternate with short recovery phases. Typically a HIIT session lasts between 15 and 30 minutes, but is extremely intense. The idea is to really give everything in the intense phases, followed by a short recovery, before you go full throttle again.

Example of a HIIT workout:

• 30 seconds sprinting
• 30 seconds walking (or slow jogging)
• Repeat the whole thing 8–10 times

Advantages of HIIT:

1. Time-saving: since HIIT workouts are usually short and intense, you can burn more calories in less time than with conventional cardio sessions.
2. Afterburn effect: after intense HIIT training, your metabolism stays elevated, so you keep burning calories even after the workout – this effect is called "excess post-exercise oxygen consumption" (EPOC).
3. Muscle building: through the combination of cardio and strength components in HIIT exercises, you can build muscle and burn fat at the same time.

Disadvantages of HIIT:

1. High strain: HIIT is physically very demanding and can increase the injury risk with poor execution. It isn't ideal for absolute beginners or people with joint problems.
2. Increased recovery time: due to the high intensity, your body needs longer to recover. You should make sure to give your body enough recovery to avoid overload.

What is LISS?

LISS stands for "low-intensity, steady-state training" and describes activities like light jogging, brisk walking or cycling over a longer period, usually 30–60 minutes. The intensity stays moderate, so you can sustain the activity over a longer period.

Example of a LISS workout:

• 45 minutes of brisk walking or light jogging at a steady pace

Advantages of LISS:

1. Lower strain: LISS is considerably gentler on the joints and the cardiovascular system. It's ideal for beginners or people recovering from injuries.
2. Easy to do: since the intensity is moderate, you can integrate LISS into your everyday life almost daily. It's also a great option for combining movement and fresh air.
3. Lower injury risk: the slow and steady nature of LISS means the injury risk is significantly lower compared to HIIT.

Disadvantages of LISS:

1. More time-consuming: to burn the same calories as with a HIIT workout, you have to invest significantly more time with LISS. For people with little time, that could be a disadvantage.
2. Lower afterburn effect: unlike HIIT, LISS doesn't lead to a notable afterburn effect. As soon as the training is over, calorie consumption slows down again.

Which method is right for you?

The choice between HIIT and LISS depends on your individual goals, your fitness level and your lifestyle.

• If you have little time and want to burn fat quickly, HIIT is the better choice. It's intense and time-saving and at the same time gives you the opportunity to improve your endurance and muscle strength.
• If you're a beginner, prefer a gentler workout or are just getting back into training, LISS is ideal. You can start slowly, build up your endurance and easily integrate the training into your everyday life.

Combine the best of both worlds: you don't have to decide on just one method. Many fitness professionals recommend integrating both HIIT and LISS into your training plan to benefit from the respective advantages. That way you can give it all on some days with an intense HIIT workout and on other days strengthen your endurance with a relaxing LISS session while also promoting your recovery.

Conclusion

HIIT and LISS are both effective cardio methods, but which is best for you depends on your goals and preferences. HIIT offers fast results in a short time, while LISS is gentler and easier to integrate into everyday life. No matter which method you choose – the most important thing is that you train regularly and find a routine that's fun for you and helps you reach your fitness goals.

So, what suits you better – quick power or long endurance? Test both methods and find out what does your body the most good!