What does "HIIT" stand for in fitness terminology?

"HIIT" stands for High-Intensity Interval Training, which is a popular and effective workout strategy that alternates between short bursts of intense exercise and varied recovery periods. This training method is designed to maximize cardiovascular fitness and calorie burn in a shorter amount of time compared to traditional steady-state workouts.

HIIT workouts can include a wide variety of exercises and are characterized by their intensity, pushing participants to work at near-maximum effort during the high-intensity intervals. The structured rest or low-intensity segments allow for recovery, which makes the workout sustainable and beneficial even for those new to exercise. This efficiency and effectiveness in improving both aerobic and anaerobic fitness levels are why HIIT has gained widespread recognition and popularity within fitness communities.

The other options, while they may sound plausible, do not accurately describe the widely accepted definition and components of HIIT.