Interval Training: HIIT and Sprint Intervals

Evidence-Informed Interval Prescription, Intensity Control, Progression, and Safety

Learn how to design effective interval-training programs using high-intensity interval training (HIIT), sprint interval training, Tabata-inspired protocols, and individualized exercise progressions.

Interval Training: HIIT, Tabata, Sprint Intervals, and Program Design is a practical 3-CEC continuing education course exploring the science and application of interval training for fitness professionals.

The course examines how work intensity, exercise duration, recovery periods, training frequency, and exercise selection influence cardiovascular and metabolic adaptations. Fitness professionals will learn to distinguish moderate intervals, aerobic HIIT, sprint interval training, and the original Tabata research protocol.

Special attention is given to prescribing intensity using heart rate, ratings of perceived exertion (RPE), the Talk Test, pace, speed, and power.

The course also addresses the benefits and limitations of HIIT, appropriate interval training for older adults and special populations, exercise screening, recovery management, and the integration of interval training into comprehensive fitness programs.

Fitness professionals will learn how to develop safe, progressive interval sessions that support cardiovascular fitness, exercise performance, client adherence, and long-term health.

Topics Include:

• Understanding the interval-training continuum

• Moderate intervals versus high-intensity interval training

• HIIT versus sprint interval training (SIT)

• The original Tabata research protocol

• Tabata-inspired timing versus true Tabata intensity

• Aerobic and anaerobic energy-system contributions

• Understanding work and recovery physiology

• Work-to-recovery ratios and interval density

• Active versus passive recovery

• Short-, moderate-, and long-duration intervals

• Prescribing intensity using heart rate and heart-rate reserve

• Ratings of perceived exertion and the Talk Test

• Speed, pace, power, and external workload

• Selecting appropriate exercise modes

• Cycling, running, rowing, uphill walking, and aquatic intervals

• High cardiovascular intensity versus mechanical impact

• Programming aerobic HIIT sessions

• Sprint interval training and repeated-sprint performance

• The 4 × 4-minute interval model

• Short-interval and reduced-volume sprint protocols

• Research-supported cardiovascular and metabolic benefits

• HIIT versus moderate-intensity continuous training

• Body composition, enjoyment, and client adherence

• Interval training for older adults and beginners

• Cardiovascular disease, hypertension, diabetes, and other health considerations

• Screening, warning signs, and appropriate referral

• Warm-up, cooldown, and recovery strategies

• Progressive interval programming

• Integrating interval training with resistance training and athletic preparation

• Practical interval-training program examples

• The NFPA Interval Training Programming Process

Course Includes:

3 NFPA Continuing Education Credits

Self-paced PDF continuing education course

15-question Practice Knowledge Check with answer key and explanations

Practical interval-training protocols and programming examples

Evidence-informed guidance for intensity prescription, recovery, progression, and safety

The timer does not define the training—the complete dose does.