HIIT (High-Intensity Interval Training)
Definition
A training method that alternates short bursts of intense exercise with brief recovery periods, delivering significant cardiovascular and metabolic benefits in less time.
High-Intensity Interval Training involves alternating between short periods of near-maximum effort exercise and brief recovery intervals. A typical HIIT session might consist of 20-30 seconds of all-out sprinting followed by 60-90 seconds of walking, repeated for 15-25 minutes.
Research shows HIIT can deliver comparable or superior cardiovascular and metabolic benefits to steady-state cardio in a fraction of the time. It increases VO2 max, improves insulin sensitivity, boosts metabolism through excess post-exercise oxygen consumption (EPOC), and can be more effective for fat loss than traditional moderate-intensity exercise.
HIIT should be limited to 2-3 sessions per week due to its demanding nature on the body. Adequate recovery between sessions is essential to prevent overtraining, injury, and burnout. HIIT can be performed with any form of exercise including running, cycling, swimming, rowing, or bodyweight exercises.
Related Calculators
Related Terms
Heart Rate Zone
healthRanges of heart rate intensity during exercise, expressed as percentages of maximum heart rate, used to optimize training for specific fitness goals.
VO2 Max
healthThe maximum rate of oxygen consumption during exercise, considered the gold standard measure of cardiovascular fitness and aerobic endurance.
TDEE (Total Daily Energy Expenditure)
healthThe total number of calories your body burns in a day, combining basal metabolic rate, physical activity, and the thermic effect of food.
Metabolic Rate
healthThe speed at which your body burns calories for energy, encompassing basal metabolic rate plus the energy used for activity and digestion.
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