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High Intensity Interval Training (HIIT) has gained immense popularity in recent years due to its effectiveness in burning calories and improving cardiovascular fitness. As a result, the demand for HIIT trainers and instructors has skyrocketed. If you are passionate about fitness and want to pursue a career in this field, getting certified in HIIT can be a game-changer. In this article, we will explore the 10 best HIIT courses and certifications available online. These certifications will not only enhance your skillset but also increase your employability in the fitness industry.

1. ACE Group Fitness Instructor Certification

The ACE Group Fitness Instructor Certification is a well-recognized and respected certification offered by the American Council on Exercise. This comprehensive course provides an in-depth understanding of HIIT principles, exercise selection, class design, and safety guidelines. Upon completion, you will have the knowledge and expertise to effectively lead HIIT classes in a safe and engaging manner.

2. NASM Certified Personal Trainer (CPT) + Corrective Exercise Specialization (CES)

The NASM CPT certification is one of the most sought-after certifications in the fitness industry. While it primarily focuses on personal training, it also covers HIIT training extensively. By combining the CPT certification with the Corrective Exercise Specialization (CES), you gain a more holistic understanding of human movement and how to incorporate HIIT into personalized training programs.

3. ISSA HIIT Certification

The International Sports Sciences Association (ISSA) offers a specialized HIIT certification that equips you with the knowledge and skills to design and implement effective HIIT workouts. This certification covers HIIT fundamentals, exercise selection, program design, and client assessment. The ISSA HIIT certification is widely recognized and can open doors to various career opportunities in the fitness industry.

4. AFPA High-Intensity Interval Training (HIIT) Specialist Certification

The AFPA HIIT Specialist Certification focuses specifically on HIIT training methodologies and how to optimize results for clients of different fitness levels. This course delves into topics such as HIIT principles, program design, safety considerations, and nutrition for HIIT. By completing this certification, you will emerge as a well-rounded HIIT specialist.

5. NCSF HIIT Certification

The National Council on Strength and Fitness (NCSF) offers a comprehensive HIIT certification that covers the scientific principles, training protocols, and exercise techniques of HIIT. By obtaining this certification, you gain the expertise necessary to design individualized HIIT programs, analyze performance, and optimize training outcomes for clients.

6. AFAA Group Fitness Instructor Certification

The AFAA Group Fitness Instructor Certification is widely recognized and respected in the industry. While it covers various group fitness formats, it also includes a comprehensive section on HIIT training. This certification not only equips you with the knowledge to deliver high-intensity workouts but also provides important insights into class management and leadership skills.

7. ACSM Certified Personal Trainer (CPT)

The American College of Sports Medicine (ACSM) Certified Personal Trainer (CPT) certification provides a strong foundation in exercise science, program design, and client assessment. While the primary focus is on personal training, the knowledge and skills gained from this certification can be easily applied to HIIT training. By becoming ACSM certified, you showcase your expertise in delivering evidence-based, safe, and effective workouts.

8. ExpertRating High-Intensity Interval Training Certification

ExpertRating offers an affordable and convenient online HIIT certification that covers the fundamental principles of HIIT, exercise selection, intensity techniques, and safety considerations. This certification is self-paced, allowing you to learn at your own speed and complete the program when it suits you best.

9. NAFC Nutrition and Fitness Coach Certification + HIIT Specialization

The NAFC Nutrition and Fitness Coach Certification, combined with the HIIT Specialization, offers a unique combination of nutritional knowledge and HIIT training expertise. This certification allows you to provide holistic guidance to clients, incorporating both nutrition and HIIT to help them achieve their fitness goals.

10. NSCA Certified Strength and Conditioning Specialist (CSCS)

The NSCA Certified Strength and Conditioning Specialist (CSCS) certification is highly regarded in the fitness industry. While it primarily focuses on strength and conditioning, the knowledge attained from this certification can be effectively applied to HIIT training as well. By becoming a CSCS, you demonstrate your proficiency in designing and implementing safe and effective training programs for athletes and individuals alike.


By acquiring a HIIT certification, you not only enhance your skills and knowledge but also position yourself as a sought-after fitness professional. These 10 online courses and certifications provide a variety of options to suit your interests and career goals. Whether you choose to specialize in HIIT or incorporate it into a broader training approach, these certifications will give you the competitive edge needed to excel in the fitness industry. So, take the leap today and embark on a fulfilling career as a certified HIIT trainer or instructor.