Dominic Stone
Interval sprints are a great way to burn fat and calories. Compared to HIIT, sprint interval training (SIT) burns 39.95% more body fat in 60.84% less time. SIT is a workout that combines short bursts of intense activity with longer rest periods. It is an advanced workout that pushes your body to its maximal intensity and may be more suitable for individuals with a solid fitness foundation. SIT can be performed through running or cycling, and it helps build endurance, increase speed, and improve athletic performance.
| Characteristics | Values |
|---|---|
| Type of Training | High-intensity interval training (HIIT) |
| Comparison with HIIT | Burns 39.95% more body fat than HIIT |
| Comparison with MICT | Burns 39.59% more body fat than MICT |
| Workout Style | Periods of intense work followed by a long rest period |
| Number of Intervals | 4-7 |
| Duration of Intervals | 30 seconds |
| Recovery Time | 4 minutes |
| Number of Workouts per Week | 2 |
| Warm-up Time | 10 minutes |
| Calories Burned in 3 Minutes | 275-320 calories |
| Muscle Build | Engages fast-twitch muscle fibers |
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What You'll Learn
Sprint interval training (SIT) burns more fat than HIIT
Sprint interval training (SIT) is a time-efficient workout that combines periods of maximal effort with longer rest periods. It is an advanced workout with two components: short bursts of activity performed at maximal effort, followed by a long rest period. SIT is designed for people who have a solid fitness foundation.
SIT is considered a vigorous physical activity. Although the highest calorie burn comes from the sprint intervals, you are also burning calories during the rest periods. This is especially true if you are performing active rest, such as walking, compared to passive rest, such as sitting or standing still.
Research by RunRepeat showed that SIT resulted in a 39.59% to 39.95% higher reduction in body fat percentage than HIIT. SIT participants also exercised for 60.84% less time than HIIT participants. SIT participants conducted 15.54% fewer workouts every week on average compared to MICT, and these workouts were 60.12% shorter. During these workouts, the SIT group did 4.68% fewer sprints than the HIIT participants.
A 2019 review and meta-analysis found that interval training — both HIIT and SIT — resulted in 28.5% greater reductions in total absolute fat mass compared with moderate-intensity continuous training.
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SIT builds muscle by working fast-twitch muscle fibres
Sprint interval training (SIT) is a workout that combines periods of intense work with longer rest periods. It involves short bursts of activity performed at maximal effort, followed by a long rest period. SIT is an advanced workout that is designed for people with a solid fitness foundation. It can improve athletic performance, cardiorespiratory fitness, and anaerobic fitness.
SIT is an effective way to build muscle by working fast-twitch muscle fibres. Fast-twitch muscle fibres, also known as type II muscle fibres, are responsible for rapid and explosive movements. They are essential for power performance and sudden bursts of energy but get fatigued quickly. Fast-twitch muscle fibres can be trained and strengthened through sprinting and other cardiovascular activities, such as intermittent sprints, hill repeats, and fartlek runs.
To effectively target and build fast-twitch muscle fibres, it is important to push your body to maximal intensity during the work periods of SIT. This can include activities such as sprinting, box jumps, and burpees. By performing these exercises at maximum effort, you will engage and fatigue the fast-twitch muscle fibres, stimulating their growth and improvement.
Additionally, incorporating strength training and resistance exercises into your routine can also help build fast-twitch muscle fibres. This includes activities such as powerlifting, lifting weights, and plyometric exercises. It is recommended to progressively overload your training by gradually increasing the intensity and frequency of your workouts to allow your body to adapt and recover.
By including SIT in your fitness routine and focusing on exercises that target fast-twitch muscle fibres, you can effectively build and strengthen these muscle fibres, leading to improved athletic performance and overall fitness.
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SIT improves athletic performance
Sprint Interval Training (SIT) is a time-efficient workout that combines periods of maximal effort with longer rest periods. It is a great way to improve athletic performance, cardiorespiratory fitness, and anaerobic fitness.
SIT is an advanced workout with two components: short bursts of activity performed at maximal effort, followed by a long rest period. This typically involves 4–7 intervals of up to 30 seconds each, interspersed with periods of active or passive recovery. The number of intervals can be gradually increased over time.
SIT is a challenging approach to exercise that can also boost your mental toughness. Pushing through intense sprints helps build resilience, focus, and confidence in tackling challenges. It is a great way to build strength and power while saving time, making it ideal for those with busy schedules.
SIT is also a flexible workout that can be adapted to suit individual needs and preferences. It can be incorporated into a range of activities, such as cycling or bodyweight exercises, and can be tailored in terms of intensity, duration, and number of intervals.
Additionally, SIT has been shown to improve the body's ability to regulate blood sugar levels, reducing the risk of type 2 diabetes and improving overall metabolic health. It is a highly effective method for burning fat and calories, with one study finding that it resulted in a 39.95% higher reduction in body fat percentage compared to HIIT.
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SIT is a time-efficient workout
Sprint interval training (SIT) is a time-efficient workout that combines short bursts of intense activity with longer recovery periods. SIT is an advanced workout that requires a baseline fitness level, and it is not recommended for beginners or those with injuries or chronic pain.
SIT is characterised by repeated, brief intermittent bursts of maximum effort, typically 4-6 intervals of up to 30 seconds each, followed by active or passive recovery periods. This type of training allows individuals to achieve high-intensity exercise in a minimum amount of time, making it ideal for those with busy schedules.
The benefits of SIT include improved athletic performance, cardiorespiratory fitness, and anaerobic fitness. It is a highly effective workout for burning fat and calories, with studies showing that it leads to a higher reduction in body fat percentage than HIIT (High-Intensity Interval Training) and moderate-intensity continuous training. SIT participants also exercised for significantly less time than those in the other two groups, making it a more time-efficient workout.
In addition to its fitness and weight loss benefits, SIT can be done anywhere and does not require a gym membership, making it a cost-effective option. It is important to note that SIT is a demanding workout, and it is recommended to consult a healthcare professional before starting this type of training to ensure safety and proper form.
Overall, SIT is a time-efficient, highly effective workout that can help individuals improve their fitness, burn fat, and increase their endurance. When combined with proper nutrition and recovery, SIT can be a powerful tool for achieving health and fitness goals.
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SIT improves endurance and increases anaerobic threshold
Sprint interval training (SIT) is a workout that combines short bursts of intense activity with longer rest periods. It is an advanced workout that requires participants to push their bodies to maximal intensity.
SIT improves endurance and increases the anaerobic threshold. Anaerobic endurance is the body's ability to perform short, intense bursts of exercise or sustain high-intensity exercise for up to 3 minutes. Anaerobic exercise uses the phosphagen system and fast glycolysis to generate energy without oxygen.
Training at or just above the anaerobic threshold intensity improves both aerobic capacity and the anaerobic threshold level. SIT's intense work periods followed by rest periods make it an effective way to improve endurance and increase the anaerobic threshold.
In a 2018 study, 16 trained trail runners completed 4-7 bouts of 30 seconds of maximal-intensity sprinting, interspersed with 4 minutes of recovery, 3 times a week for 2 weeks. The runners experienced improvements in endurance, strength, and power. Similarly, a 2019 review and meta-analysis found that interval training resulted in greater reductions in total absolute fat mass compared to moderate-intensity continuous training.
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Frequently asked questions
No, interval sprints do not burn muscle. In fact, sprint interval training (SIT) is a great way to build muscle mass and endurance while increasing your anaerobic threshold.
SIT is a type of high-intensity interval training (HIIT) that involves short bursts of intense activity followed by longer rest periods. During the high-intensity periods, you engage in fast-twitch muscle fibres, which add overload to your muscles, helping to build muscle mass and improve athletic performance.
It is recommended that you start with two SIT workouts per week and gradually increase from there. It is important to give your body time to recover between SIT sessions, so it is best to avoid doing them on consecutive days. Instead, you can do lower-intensity cardio workouts or strength training on the days in between your SIT sessions.
