What is an interval timer?

An interval timer alternates between work and rest periods for a set number of rounds. It is commonly used for HIIT (High-Intensity Interval Training), Tabata, circuit training, boxing, and CrossFit workouts. For example, a typical HIIT setup is 30 seconds work followed by 15 seconds rest for 8-12 rounds.

What are the best interval timer settings for HIIT?

The most effective HIIT intervals depend on fitness level. Beginners should start with 20 seconds work / 40 seconds rest for 6-8 rounds (total 6-8 minutes). Intermediate: 30 seconds work / 30 seconds rest for 8-10 rounds. Advanced: 40 seconds work / 20 seconds rest for 10-12 rounds. Always include a 2-3 minute warmup before starting.

What is the Tabata interval protocol?

The Tabata protocol is a specific HIIT format: 20 seconds of maximum-effort work followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total). Developed by Dr. Izumi Tabata in 1996, research showed it improved both aerobic and anaerobic capacity more effectively than 60 minutes of moderate exercise.

Interval Timer

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Interval Presets

Tabata (20/10) Workout 1 Min Round Stretching Plank

Interval Training Guide

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Tabata (20s/10s x 8)

The gold standard of interval training. 20 seconds all-out effort, 10 seconds rest, 8 rounds. Just 4 minutes total but burns more fat than 60 minutes of jogging. Best for: burpees, sprints, jump squats, mountain climbers.

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HIIT (30s/30s x 10)

Equal work-to-rest ratio for balanced intensity. 30 seconds work, 30 seconds rest for 10 rounds (10 minutes). Great for beginners building toward shorter rest periods. Best for: kettlebell swings, box jumps, battle ropes.

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Boxing Rounds (3m/1m)

Standard boxing round format: 3 minutes work, 1 minute rest. Professional boxing uses 12 rounds, amateur 3 rounds. Also used for kickboxing, MMA training, and shadowboxing. The timer helps track round transitions.

Popular Interval Protocols

Protocol	Work	Rest	Rounds	Total
Tabata	20s	10s	8	4 min
HIIT Basic	30s	30s	10	10 min
EMOM	40s	20s	10	10 min
Boxing	3 min	1 min	3-12	12-48 min
Circuit	45s	15s	8	8 min

Why Interval Training Works

Interval training triggers EPOC (Excess Post-Exercise Oxygen Consumption), meaning your body continues burning calories for hours after your workout. Studies show that 15 minutes of interval training can burn more calories than 45 minutes of steady-state cardio, including the afterburn effect.

The key is intensity during work periods. You should reach 80-95% of your max heart rate during work intervals, then allow your heart rate to drop to 60-65% during rest. This oscillation trains your cardiovascular system far more effectively than maintaining a constant moderate pace.

Related Timers

Tabata Timer - 20/10 protocol
Workout Timer - Exercise timer
Stretching Timer - Recovery
Plank Timer - Core training
30 Second Timer
1 Minute Timer