HIIT Timer
Free HIIT timer with customizable work/rest intervals. Visual countdown with sound alerts. Perfect for high-intensity interval training at home or in the gym.
💪 HIIT Timer: 40s work / 20s rest × 8 rounds = 8 minutes total. Audio alerts between intervals. Click Start when ready.
About HIIT training
HIIT (High-Intensity Interval Training) alternates short bursts of all-out work with rest periods. The default 40s work / 20s rest × 8 rounds is a balanced HIIT protocol that delivers cardiovascular benefit in 8 minutes.
Benefits
- ·Burns more calories per minute than steady-state cardio
- ·Triggers EPOC (excess post-exercise oxygen consumption) — calorie burn continues hours after the workout
- ·Time-efficient: 8-20 minutes vs 30-60 minutes of jogging
- ·Improves both aerobic and anaerobic capacity
- ·Can be done with bodyweight only (no equipment needed)
How the protocol works
All-out effort (90-100% max heart rate) for the work interval, then active or passive rest. The default 40/20×8 is 8 minutes total. Variations: 30/30, 45/15, 60/30. Common exercises: burpees, mountain climbers, sprints, jumping squats.
HIIT research exploded after Izumi Tabata's 1996 study. ACSM lists HIIT among the top 5 fitness trends every year since 2014. Major benefit: time-efficiency for busy adults.
Who uses it?
Busy professionals, athletes adding cardio without losing strength, anyone with limited workout windows. Not ideal for absolute beginners (start with 1:2 work-to-rest ratio first).
HIIT Timer
Free HIIT timer with customizable work/rest intervals. Visual countdown with sound alerts. Perfect for high-intensity interval training at home or in the gym.
Related
Frequently asked questions
What is HIIT training?
HIIT (High-Intensity Interval Training) alternates between periods of intense exercise and rest. It burns more calories in less time than traditional cardio.
How many rounds should I do?
This timer is pre-set with 8 rounds (8 minutes total), which is a great starting point. Beginners can stop early. Advanced athletes can do multiple sets.
What exercises work with this timer?
Any bodyweight or weighted exercise works: burpees, squats, push-ups, jumping jacks, mountain climbers, kettlebell swings, box jumps, or rowing. Choose exercises that match your fitness level.