HIIT: The Ultimate Guide to High-Intensity Interval Training

Are you tired of the same old treadmill workouts that leave you feeling bored and uninspired? If so, it’s time to dive into the world of high-intensity interval training (HIIT). This fitness trend is changing the game by burning calories, building muscle, and boosting fitness in less time than traditional cardio. But what is HIIT, and how can it change your body and fitness level? Let’s dive into the ultimate guide to HIIT and unlock the secrets to better workout results.

Key Takeaways

• HIIT alternates short bursts of intense exercise with less intense recovery periods, leading to greater fat loss and muscle-building benefits compared to steady-state cardio.
• HIIT workouts can boost metabolism, increase aerobic endurance, and improve body composition in a shorter amount of time.
• Tabata training, a popular HIIT protocol, involves 20 seconds of maximum effort followed by 10 seconds of rest, repeated for four minutes.
• Incorporating HIIT workouts 1-3 times per week, with rest days in between, is recommended for optimal results.
• HIIT can improve glucose metabolism, reduce visceral fat, and potentially enhance mental health by reducing depression symptoms.

What is High-Intensity Interval Training (HIIT)?

High-Intensity Interval Training (HIIT) is a way to work out that mixes short, intense exercises with rest periods. This mix is different from regular cardio. HIIT uses short, hard efforts followed by rest to work on the body’s anaerobic energy systems. This leads to many benefits.

Understanding Intensity in HIIT

Intensity is key in HIIT. During these intense parts, people work hard, reaching 80-95% of their top heart rate. This high effort is what makes HIIT work so well. It uses anaerobic processes and tests physical limits.

The Role of Intervals in HIIT

Intervals are what make HIIT work. They let the body recover a bit before the next hard push. This mix of work and rest makes HIIT efficient and effective. It offers big benefits for the heart and metabolism in less time than traditional cardio.

“HIIT can be incorporated with any type of cardio workout and is a powerful cardio exercise that can help save time compared to steady-paced workouts.”

HIIT workouts are short, lasting 10 to 30 minutes. They involve quick, all-out efforts followed by rest. This format lets people push hard while recovering, improving fitness and burning fat.

Benefits of HIIT Workouts

High-Intensity Interval Training (HIIT) is a new way to stay fit that beats traditional cardio. It helps with HIIT fat loss, HIIT metabolism, HIIT muscle building, and HIIT cardiovascular fitness. Studies show it’s a game-changer.

Increased Fat-Burning and Mitochondrial Density

HIIT is great for burning fat and boosting your metabolism. It makes your body burn more calories, even if you’re not moving. This happens because HIIT makes your metabolism faster and increases the number of mitochondria in your cells. Mitochondria are key for making energy.

HIIT is a top choice for those wanting to get fit, look better, and feel healthier. It’s efficient and effective.

Calculating Target Heart Rate for HIIT

To make sure you’re working hard enough for HIIT, you need to figure out your target heart rate. The Karvonen formula helps you find your heart rate reserve (HRR). This is the gap between your resting heart rate and your top heart rate. For HIIT, aim for 70-85% of your HRR. This way, your fitness tracker or heart rate monitor can tell you when you’re in the right zone.

The American College of Sports Medicine (ACSM) says HIIT means doing short, intense activities with breaks. These intense parts should be at 80-95% of your max heart rate. The Centers for Disease Control and Prevention (CDC) suggest a simple way to guess your max heart rate: subtract your age from 220.

For instance, a 35-year-old’s max heart rate would be 185 beats per minute (bpm). During HIIT’s intense parts, your heart rate should hit 148 bpm (about 80% of max) to 175 bpm (about 95% of max). The breaks should be at 40-50% of your max heart rate.

To find your target heart rate for HIIT, just follow these steps:

1. Figure out your estimated maximum heart rate: 220 – your age
2. Find your heart rate reserve (HRR): Maximum heart rate – resting heart rate
3. Set your HIIT target heart rate zone: 70-85% of your HRR

For a 35-year-old with a resting heart rate of 70 bpm, the steps would be:

• Estimated maximum heart rate: 220 – 35 = 185 bpm
• Heart rate reserve: 185 bpm – 70 bpm = 115 bpm
• HIIT target heart rate zone: 70-85% of 115 bpm = 80-98 bpm

Staying in this heart rate zone during HIIT workouts will challenge your heart and make the most of this intense training.

“HIIT workouts usually last from 20 to 60 minutes, with work and rest periods.”

Always talk to a healthcare professional before starting a new exercise plan, especially if you have health issues. With the right heart rate zone and a good HIIT plan, you can enjoy the fat-burning and heart health benefits of this powerful training.

Examples of HIIT Workouts

High-Intensity Interval Training (HIIT) workouts are known for their great results in burning fat and boosting fitness. Two top examples are barbell complexes and strongman intervals.

Barbell Complexes

Barbell complexes are a series of exercises done with a barbell without resting. They are performed as fast as possible. This method works out your whole body and tests your strength and fitness.

By moving from deadlifts to rows, overhead presses, and squats without pause, you get a strong HIIT workout. It targets many muscle groups at once.

Strongman Intervals

Strongman intervals include exercises like sled pushes, farmer’s walks, and log lifts. They are a full-body HIIT workout that uses your anaerobic energy. These exercises need a lot of strength, power, and endurance.

Switching between these intense exercises and short breaks, you create a great HIIT session. It pushes you hard and gives amazing results.

Adding barbell complexes and strongman intervals to your strength training helps you enjoy HIIT’s benefits. These exercises help you burn fat, improve your heart health, and build muscle strength and endurance.

Integrating HIIT with Cardio Training

HIIT and traditional cardio can work well together. HIIT is all about short, intense workouts. On the other hand, steady-state cardio helps improve your heart health and endurance. Mixing both in your routine gives you a complete fitness plan for losing fat.

It’s important to balance HIIT with steady-state cardio for recovery. This way, you get the best of both worlds. You’ll reach your fitness and fat loss goals faster.

Combining HIIT and steady-state cardio brings together aerobic and anaerobic training benefits. This mix boosts fat loss, heart health, and overall fitness.

Studies show that HIIT after resistance training raises your resting energy use by 23.7%. It also increases fat burning by 3.5%. Plus, it helps control blood sugar better than just doing resistance exercises.

Adding HIIT and steady-state cardio to your routine is a strong combo for fitness goals. By mixing these methods, you get the most out of HIIT and cardio. This leads to better fitness and health.

Importance of Varying HIIT Workouts

To keep seeing progress with HIIT workouts, it’s key to mix things up often. This means changing the HIIT exercise selection, work-to-rest ratios, work times, and the whole workout setup. As your body gets used to a HIIT plan, you need to change it to keep pushing your heart and muscles.

Using different HIIT types, like Tabata, sprint intervals, and complex circuits, helps avoid plateaus and keeps improving your fitness and looks. Tabata workouts are 8 rounds of 20 seconds of hard exercise followed by 10 seconds of rest. Circuit training mixes strength exercises and cardio with little rest in between.

Sprint intervals are another great HIIT type. They mix short, all-out sprints with active rest. These HIIT program designs keep you motivated and work different energy systems and muscles, leading to better fitness overall.

By changing your HIIT workout variation often, you challenge your body and avoid hitting a wall. This makes the most of this intense training method.

“Variation is the key to progress in any fitness program, and HIIT is no exception. Constantly changing up the exercises, intervals, and overall structure of your HIIT workouts will keep your body guessing and your results improving.”

For long-term success with HIIT, always adapt and change your workouts. Using different HIIT exercise selection and HIIT program design keeps you motivated, engaged, and moving towards your fitness goals.

Frequency and Recovery for HIIT

High-Intensity Interval Training (HIIT) is tough on your heart and muscles. It’s important to know how often to do it and how to rest. Doing HIIT too much or not resting enough can lead to overtraining. This can slow down your progress and increase the chance of getting hurt.

Experts say to do HIIT 2-3 times a week, with at least 48 hours of rest in between. This lets your body recover and get stronger. It helps you perform better in your next HIIT workout.

Listen to what your body tells you about how often to do HIIT. Some people need more rest, while others can do it more often. Watch how you feel, your energy levels, and your mood before and after HIIT workouts. This will help you find the best schedule for you.

Doing too much HIIT can cause fatigue, decreased performance, increased risk of injury, and hormonal imbalances. To avoid these problems, make sure you recover well between workouts. You can do this by doing easy cardio or stretching to help your body heal.

Finding the right balance between HIIT and rest is key. It lets you get the most out of this effective training method without getting overtrained or hurt. Making recovery a priority is important for reaching your fitness goals and keeping up your progress over time.

The path to better fitness is long. Be patient, stay consistent, and pay attention to your body’s needs. This will help you reach your HIIT goals without the risks of overtraining.

The Rise of High-Intensity Interval Training

High-Intensity Interval Training (HIIT) has become very popular in fitness over the last 20 years. This is thanks to lots of research that shows it works well. Since the mid-1990s, studies have found that HIIT burns more fat and improves heart health better than steady cardio.

Experts like Izumi Tabata have helped make HIIT popular. They studied the science behind it and introduced the Tabata method.

People want workouts that are quick and effective. HIIT offers a great option. It makes your body change in ways that help with health, like lowering blood pressure and cholesterol.

HIIT is also good for certain groups, like those with heart or lung problems. It’s a good choice for people who can’t do long workouts.

The popularity of HIIT comes from its benefits. It’s easy on the joints and backed by science. It helps with fitness, heart health, and body shape. More people are choosing HIIT for its effectiveness and efficiency.

“High-intensity exercise can trigger the release of growth hormone, testosterone, endorphins, adrenaline, noradrenaline, cortisol, and aldosterone, all of which have effects on body composition and anabolism.”

Tabata: A Popular HIIT Protocol

The Tabata protocol is a top HIIT (High-Intensity Interval Training) method. It was created by Japanese researcher Izumi Tabata. The workout includes 20 seconds of full effort followed by 10 seconds of rest. This pattern is repeated for 4 minutes.

This short workout is as good for improving VO2 max as 45 minutes of traditional cardio. Its simplicity and effectiveness make it a favorite for gym and home workouts.

Tabata workouts last 4 minutes and have eight rounds of 20 seconds of hard exercise with 10 seconds of rest. Traditional HIIT workouts can last 20 to 40 minutes, with longer intervals. A 2013 study showed that a 20-minute Tabata session improved cardio and burned more calories than regular exercise.

Tabata is known for being efficient, saving time while boosting cardio and strength. It’s great for burning fat and perfect for travelers because you don’t need any equipment. Yet, a 2015 study found it was less enjoyable than other exercises over 8 weeks.

Tabata involves eight sets of 20 seconds of work and 10 seconds of rest, making a 4-minute round. Beginners should start with one or two rounds to get used to the intensity. Common exercises include push-ups, high knees, and mountain climbers.

Dr. Izumi Tabata developed Tabata in the 1990s for Japan’s Olympic speed skaters. It’s a top choice for burning fat and is great for travelers because you don’t need any equipment. Always talk to a doctor before starting this intense workout and watch your heart rate to stay safe.

In summary, Tabata is a well-known and effective HIIT method. It offers great cardio and strength benefits in a short time. Its intense nature and flexibility make it great for fitness lovers and busy people.

Avoiding Overtraining with HIIT

High-Intensity Interval Training (HIIT) is a great way to work out, but it’s tough. Doing HIIT too much or without rest can lead to overtraining. This can make you perform worse, increase your chance of getting hurt, and mess with your hormones. It’s important to pay attention to your body and adjust your HIIT schedule as needed.

Experts say to do HIIT 2-3 times a week, with at least 48 hours off between intense sessions. HIIT involves short, intense efforts followed by rest periods. These cycles are repeated several times, lasting from 3 to 10 rounds.

Overtraining can cause high cortisol levels, leading to fatigue, muscle tiredness, mood changes, and more. It’s key to recover well between intervals and take rest days to see good results from HIIT.

Changing your workout plan every month can prevent overtraining. Mixing HIIT with moderate cardio has many health perks, like better heart health and lower cholesterol.

Understanding the need for rest and recovery helps you get the most from HIIT without overdoing it. Listen to your body and tweak your HIIT plan to stay safe and reach your fitness goals.

High-Intensity Interval Training for Muscle Building

HIIT is not just for losing fat and improving heart health. It’s also great for building muscle. By adding HIIT workouts to your strength training, you challenge your body’s anaerobic energy systems. This helps grow your muscles. HIIT exercises like barbell complexes and Strongman intervals work your whole body. They increase muscle mass and strength when you eat right and lift weights.

Studies say supersets burn about 35% more calories during and after a workout than regular sets. Giant sets, doing four or more exercises together without resting, boost volume and intensity quickly. Also, dropsets work best when you use lighter weights, 20-30% less than usual.

Forced reps boost growth hormone levels more than just lifting to muscle failure. This helps grow muscles and burn fat. Negatives focus on the lowering part of a rep, which helps increase strength and muscle size.

HIIT workouts are short, intense bursts followed by quick rests. These cycles repeat with exercises like biking, treadmill, bodyweight, kettlebells, dumbbells, or jump rope. HIIT burns lots of calories quickly, keeps burning calories after, and helps build muscle.

Adding HIIT for muscle growth exercises to your routine helps with muscle growth, strength, power, and heart health. Start slow, focus on proper form, and increase intensity to avoid injuries and reach your muscle goals.

HIIT Workouts for Beginners

If you’re new to high-intensity interval training (HIIT), don’t worry. It’s a great choice for those starting out in fitness. Start slow and increase the intensity as you get fitter.

Beginner HIIT workouts include exercises like jumping jacks, squats, and burpees. They have longer breaks between intervals. This helps your body get used to the intensity without getting hurt. As you get better, you can do harder exercises and rest less.

When starting HIIT training, focus on doing exercises right. This keeps you safe and makes workouts more effective. Start with 30-45 seconds of hard work, then rest for 60 seconds.

1. Start with a dynamic warm-up to get your body ready.
2. Pick exercises you can do well that work your heart, muscles, and more.
3. Slowly make your work intervals harder and longer as you get fitter.
4. Always listen to your body and adjust or rest when needed.

Remember, beginner HIIT workouts need consistency and patience. Slowly build your fitness level to tackle harder workouts. This way, you’ll see the great benefits of HIIT.

“The beauty of HIIT is that it can be tailored to any fitness level, making it an accessible and effective workout for beginners and seasoned athletes alike.”

Combining HIIT with Weight Training

HIIT (High-Intensity Interval Training) and weight training are great together. They work well together to make your workouts better. This mix leads to amazing results.

HIIT workouts switch between intense, short bursts and easy periods. This boosts your heart and lung health and helps you lose fat. Weight training, on the other hand, builds muscle, speeds up your metabolism, and strengthens bones.

You can mix HIIT and weight training in different ways. You might do HIIT after lifting weights, or combine them with exercises like barbell complexes. This mix helps you gain muscle, boost your metabolism, and get fitter.

But, it’s important to balance your workouts and choose the right exercises. Doing too much can lead to burnout and stress. Aim for no more than two HIIT workouts a week for the best results.

• HIIT workouts usually last 20-30 minutes, with intense parts and rest.
• Adding HIIT to weight training improves strength, health, and body shape more than just doing resistance training alone.
• Adding steady cardio, like keeping a steady pace for 45 minutes, can also help with your fitness goals.

“Incorporating both HIIT and strength training into your workout routine is a powerful combination for achieving your fitness goals.”

By mixing HIIT and weight training, you can get the most out of both. This will change your body, speed up your metabolism, and take your fitness to new levels.

The Science Behind HIIT’s Fat-Burning Ability

High-intensity interval training (HIIT) is better at burning fat than traditional cardio, research shows. Even though HIIT workouts don’t burn as many calories overall, they help you lose more body fat. This is because HIIT boosts your metabolic rate and increases mitochondrial density.

HIIT workouts push your body’s anaerobic energy systems hard. This leads to big changes in hormones and a higher calorie burn after exercise. This makes HIIT a great way to lose fat efficiently. Studies say HIIT can boost your body’s fat-burning ability, especially when you’re resting. This happens because your body uses fat as fuel after HIIT workouts.

HIIT also raises human growth hormone (HGH) and testosterone levels. These hormones are key for muscle growth, fat loss, and health. The intense intervals in HIIT help grow new blood vessels and improve oxygen delivery to muscles. This boosts your heart health and endurance.

Research often shows HIIT beats traditional cardio in burning fat and boosting metabolism. For example, a study by Tjønna et al. (2009) found HIIT was better at cutting down heart disease risks in overweight teens than other types of exercise. Trapp et al. (2008) also found HIIT helped young women lose fat and improve their insulin levels.

In summary, HIIT’s fat-burning power comes from boosting your metabolism, increasing mitochondrial density, and raising key hormones. Adding HIIT to your workout routine can help you reach your weight loss and body shape goals.

“HIIT can increase the body’s capacity to burn fat, especially during the recovery periods when the body switches to burning fat as its primary fuel source due to excess post-exercise oxygen consumption (EPOC).”

Choosing the Right HIIT Workout Plan

Choosing the right HIIT workout plan is not the same for everyone. It depends on your fitness level, goals, and what you like. You should think about the exercises, how much work versus rest you do, how long the workout is, and how often you do it.

Start with a plan that challenges you but is still easy to follow. Then, slowly make it harder and more complex over time. Talking to a fitness expert can also help make sure you pick a plan that’s safe and works for you.

Factors to Consider When Selecting a HIIT Workout Plan

• Fitness Level: Pick a HIIT program that suits your fitness level, whether you’re new to working out or you’re already in shape.
• Workout Goals: Decide if you want to lose fat, build muscle, or get fitter overall. This will help you choose the right HIIT program.
• Exercise Selection: Look for a HIIT plan that includes different exercises like bodyweight exercises, strength training, and cardio. This variety helps work out different muscles and improves your fitness.
• Work-to-Rest Ratios: The amount of work versus rest in a HIIT workout can vary. Choose a plan that matches your fitness level and what you prefer.
• Workout Duration: HIIT workouts can be as short as 10 minutes or as long as 30-40 minutes. Pick a duration that fits your schedule and goals.
• Frequency: Decide how many HIIT workouts you can do each week. Choose a plan that fits your schedule.

Finding a HIIT program you enjoy and can stick with is key to success. By thinking about these factors, you can pick a HIIT workout plan that meets your fitness goals.

“HIIT workouts are a game-changer for anyone looking to burn fat and improve overall fitness. The key is finding the right plan that challenges you while still being manageable.”

Conclusion

High-Intensity Interval Training (HIIT) is a top choice for those wanting to get fit, lose fat, and gain muscle. It mixes intense work with rest periods. This makes it a great way to burn fat, boost metabolism, and improve heart health in less time than traditional cardio.

HIIT needs the right plan and recovery to work well. Learning how to do HIIT right can help you see its amazing benefits. It’s a favorite among active people looking to get the most out of their workouts.

HIIT proves that intense exercise works well. It’s a great answer to the usual problems of finding time for exercise. By following HIIT, people can take charge of their fitness and enjoy its big changes.

Source Links

• High-Intensity Interval Training: The Ultimate Guide – https://www.bodybuilding.com/content/high-intensity-interval-training-the-ultimate-guide.html
• The Ultimate Guide to High Intensity Interval Training (HIIT) – Hustle Fitness – https://hustlefitness.com/2014/04/hiit-training-demystified-ultimate-guide-high-intensity-interval-training/
• The Ultimate Guide To High-Intensity Interval Training – https://www.onelifefitness.com/news/ultimate-guide-high-intensity-interval-training
• High-Intensity Interval Training (HIIT): What It Is, How to Do It – https://www.webmd.com/fitness-exercise/a-z/high-intensity-interval-training-hiit
• High-intensity interval training – https://en.wikipedia.org/wiki/High-intensity_interval_training
• HIIT Benefits: 7 Reasons to Try High Intensity Interval Training – https://www.healthline.com/nutrition/benefits-of-hiit
• Evidence-Based Effects of High-Intensity Interval Training on Exercise Capacity and Health: A Review with Historical Perspective – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8294064/
• HIIT (High Intensity Interval Training) – https://nutritionsource.hsph.harvard.edu/high-intensity-interval-training/
• HIIT Still Deserves a Place In Your Workout Routine – https://www.shape.com/fitness/workouts/8-benefits-high-intensity-interval-training-hiit
• What You Need to Know About HIIT Workouts – https://www.onemedical.com/blog/healthy-living/what-you-need-know-about-hiit-workouts/
• How to ‘HIIT’ your exercise targets – https://www.honorhealth.com/healthy-living/how-hiit-your-exercise-targets
• How To Calculate Your HIIT Heart Rate Target Zones – https://www.liveleantv.com/lose-fat-faster-my-hiit-sprinting-routine/
• 6 Best HIIT Exercises: With and Without Equipment – https://www.healthline.com/health/best-hiit-exercises
• These HIIT Workouts Will Make You Forget Boring Cardio – https://www.menshealth.com/fitness/a25424850/best-hiit-exercises-workout/
• The Best HIIT Workouts for All Fitness Levels – Crunch – https://www.crunch.com/thehub/the-best-hiit-workouts-for-all-fitness-levels/
• ACE – Certified™: January 2017 – How to Integrate Resistance-exercise HIIT Into Your Clients’ Programs – https://www.acefitness.org/continuing-education/certified/january-2017/6203/how-to-integrate-resistance-exercise-hiit-into-your-clients-programs/
• High-intensity interval training for health benefits and care of cardiac diseases – The key to an efficient exercise protocol – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6763680/
• Who would win? Aerobic vs. HIIT Training – https://www.vailhealth.org/news/who-would-win-aerobic-vs-hiit-training
• How Long Does it Take For HIIT Results? | Fitness Evolution – https://bellinghamevo.com/how-long-does-it-take-to-see-results-from-hiit-the-science-behind-high-intensity-interval-training-hiit/
• HIIT Workouts: They’re Good for Everyone! – https://health.clevelandclinic.org/think-you-cant-do-high-intensity-interval-training-think-again
• How does high-intensity intermittent training affect recreational endurance runners? Acute and chronic adaptations: A systematic review – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6188912/
• PDF – https://www.acsm.org/docs/default-source/files-for-resource-library/high-intensity-interval-training.pdf
• Doing HIIT Workouts Every Day Might Actually Do More Harm Than Good, Experts Say – https://www.health.com/how-often-should-you-do-hiit-workouts-8418619
• HIIT: what’s the right dose? – Les Mills – https://www.lesmills.com/us/fit-planet/fitness/how-much-hiit/
• High Intensity Interval Training – an overview – https://www.sciencedirect.com/topics/medicine-and-dentistry/high-intensity-interval-training
• How high-intensity interval training can reshape metabolism – https://www.sciencedaily.com/releases/2022/05/220531151946.htm
• All About High Intensity Interval Training (HIIT) – Precision Nutrition – https://www.precisionnutrition.com/all-about-hiit
• Tabata vs. HIIT: How These Workouts Differ – https://www.healthline.com/health/exercise-fitness/tabata-vs-hiit
• Tabata vs. HIIT: What’s the Difference? – https://health.clevelandclinic.org/tabata-vs-hiit-whats-the-difference
• How to do Tabata training, the short but exhausting, fat-blasting HIIT workout | CNN – https://www.cnn.com/2022/04/19/health/tabata-training-workout-tips-wellness/index.html
• High Intensity Interval Training and Cortisol: Is HIIT Backfiring? – https://www.healthline.com/health/fitness/the-cortisol-creep
• How much HIIT is healthy for your members? – https://www.lesmills.com/clubs-and-facilities/research-insights/research/hiit-why-less-is-more/
• Too Much HIIT? Know the Risks of Excessive High-Intensity Exercise – https://www.cnet.com/health/fitness/is-hiit-bad-for-you-the-downsides-of-high-intensity-workouts/
• 7 High-Intensity Workouts for Greater Muscle Growth – Muscle & Fitness – https://www.muscleandfitness.com/workouts/workout-routines/7-high-intensity-workouts-greater-muscle-growth/
• High-intensity workouts can help you get fit fast, but preparation is key – https://health.ucdavis.edu/blog/cultivating-health/high-intensity-workouts-can-help-you-get-fit-fast-but-preparation-is-key/2022/09
• The Best HIIT Workout for Muscle Building – https://www.puregym.com/blog/the-best-hiit-workout-for-muscle-building/
• Best beginner HIIT workouts you can do at home – https://www.tomsguide.com/reference/best-beginner-hiit-workouts
• This Full-Body HIIT Workout for Beginners Will Leave You Dripping In Sweat – https://www.shape.com/fitness/workouts/hiit/hiit-workout-for-beginners
• HIIT Workouts for Beginners (3 Running & Interval Training Routines) | Nerd Fitness – https://www.nerdfitness.com/blog/3-hiit-workouts-for-beginners-how-to-start-interval-training/
• HIIT and Strength Training – Should You Do Both? | ISSA – https://www.issaonline.com/blog/post/hiit-and-strength-training-should-you-do-both
• Combine Weightlifting and HIIT to Burn Fat and Boost Metabolism – https://www.oxygenmag.com/the-60-day-metabolic-reset/combine-weightlifting-and-hiit-to-burn-fat-and-boost-metabolism/
• SWEAT440: Unleash the Power of HIIT and Strength Training – https://sweat440.com/hiit-and-strength-training/
• High-Intensity Intermittent Exercise and Fat Loss – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2991639/
• The Science Behind High-Intensity Interval Training (HIIT): How it Boosts Fitness and Burns Fat – https://elevatesyracuse.com/the-science-behind-high-intensity-interval-training-hiit-how-it-boosts-fitness-and-burns-fat/
• A Look at the Science Behind HIIT Cardio Workout – Crunch – https://www.crunch.com/thehub/science-behind-hiit-cardio-workout/
• 5 Tips for Choosing the HIIT Workout That’s Best for You – https://sweat440.com/choosing-the-hiit-workout-thats-right-for-you-in-fidi/
• The Ultimate 6-Week HIIT Workout Plan – Muscle & Fitness – https://www.muscleandfitness.com/workouts/workout-routines/hiit-6-week-full-body-workout/
• 10-Day HIIT Workout Plan – https://www.acefitness.org/resources/everyone/blog/6426/10-day-hiit-workout-plan/
• High-intensity interval exercise training for public health: a big HIT or shall we HIT it on the head? – International Journal of Behavioral Nutrition and Physical Activity – https://ijbnpa.biomedcentral.com/articles/10.1186/s12966-015-0254-9
• The Study of High Intensity Interval Training’s Effect on Enjoyment – https://digitalcommons.unomaha.edu/cgi/viewcontent.cgi?article=1104&context=university_honors_program
• Effects of High-Intensity Interval Training (HIIT) on Physical Performance in Female Team Sports: A Systematic Review – Sports Medicine – Open – https://sportsmedicine-open.springeropen.com/articles/10.1186/s40798-023-00623-2