High Intensity Interval Training

What is HIIT? HIIT alternates short bursts of maximum effort with periods of rest or low-intensity activity. Examples include sprint intervals, rowing sprints, or jump rope bursts.

Benefits of HIIT:

• Burns a large number of calories in a short amount of time.

• Boosts cardiovascular fitness and anaerobic capacity.

• Produces a strong post-exercise calorie burn (afterburn/EPOC).

  
  

Cautions with HIIT:

• Excessive HIIT can elevate cortisol, a stress hormone that, when chronically high, may impede fat loss, affect sleep, and increase muscle breakdown.

• Overdoing HIIT can interfere with recovery, especially if paired with intense strength training.

• HIIT is highly demanding, so sustainability can be a challenge if done too often.

  
  

Science Check:

• Classic studies show HIIT is effective for improving VO2 max and cardiovascular health.

• Recent research suggests a moderate HIIT schedule (1–3 sessions per week) maximizes benefits without causing chronic stress.

  
  

Tips for HIIT Success:

1. Keep sessions short and purposeful — quality over quantity.

2. Schedule HIIT strategically around your other workouts.

3. Prioritize recovery and sleep to prevent elevated cortisol from derailing your goals.

   
   

Takeaway:

HIIT is a powerful tool when used strategically. Done correctly, it enhances calorie burn, boosts performance, and complements your strength training.