WORKOUT TIMER
HIIT, Tabata, and custom interval timer. Set your work and rest periods.
WORKOUT TIMER ONLINE
Interval training requires a timer that does more than count down once. It needs to cycle between work periods and rest periods automatically, round after round, without requiring you to tap buttons between sets while catching your breath. This workout timer lets you configure work duration, rest duration, and number of rounds. Press Start and it cycles through each interval automatically, sounding distinct tones for work-start and rest-start transitions. Tabata protocols (20 seconds work, 10 seconds rest, 8 rounds) fit this format perfectly. So do circuit training rotations (45 seconds per station, 15 seconds transition, 10 stations) and boxing round timers (3 minutes work, 1 minute rest). The hands-free operation means you can leave your device on the floor or a shelf and focus entirely on the exercise, trusting the audio cues to guide your transitions.
How It Works
Set three parameters: work duration (how long each active interval lasts), rest duration (how long each recovery pause lasts), and number of rounds. Press Start and the timer begins the first work interval. When the work period ends, a tone signals the transition to rest. When rest ends, another tone signals the next work interval. This cycle repeats for the specified number of rounds. A round counter tracks your progress. The timer uses system-clock drift correction for accuracy during intense physical activity when you are not watching the screen.
When to Use This Timer
Configure 20/10 for classic Tabata protocol (8 rounds of 20 seconds work, 10 seconds rest). Set 45/15 for circuit training station rotations. Boxing trainers program 3 minutes work with 1 minute rest for round-based training. CrossFit athletes set custom EMOM intervals. Yoga teachers use the timer for timed hold sequences where each pose lasts a specific duration.
Why Interval Training Needs a Dedicated Timer
Standard timers require manual restart between intervals, which breaks exercise flow and creates rest-period creep (rest gradually extends as you catch your breath and fumble with buttons). An interval timer automates transitions, enforcing consistent work-to-rest ratios that are essential for the physiological stimulus interval training is designed to produce. Research in the Journal of Strength and Conditioning shows that inconsistent rest periods reduce training adaptations by up to 20 percent.
Frequently Asked Questions
What is the Tabata protocol?
Tabata is an interval training format: 20 seconds of maximum effort followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total). Developed by Dr. Izumi Tabata, research showed it improves both aerobic and anaerobic capacity in trained athletes.
Can I set different work and rest durations?
Yes. Configure any combination: 30/30 for equal work and rest, 45/15 for endurance focus, 20/10 for Tabata, or 60/30 for moderate intervals. The timer supports flexible configuration for any interval training protocol.
Does the timer make different sounds for work and rest?
Yes. The work-start and rest-start transitions use distinct tones so you can identify the phase change by sound alone without looking at the screen. This is critical during exercises where you cannot see your device.
How many rounds should I set for HIIT?
Most HIIT protocols use 4 to 10 rounds depending on interval length and fitness level. Tabata uses 8 rounds (4 minutes total). Longer intervals (45/15) may use 6 to 8 rounds for a 6 to 8 minute workout. Adjust based on your conditioning level.
Can I use this for yoga hold timing?
Yes. Set the work duration to your desired hold length (30 to 90 seconds) and the rest to a transition period (10 to 15 seconds). The timer cycles through poses automatically, letting the instructor focus on cueing rather than clock watching.
Related Tools
5 Minute Timer 10 Minute Timer 25 Minute Timer Stopwatch All Timers
EXPLORE MORE TIMERS
Second Timers
Minute Timers
Specialized Timers
Clocks & Tools
More Free Tools
From the same creator: Kaalq (60+ free calculators) and Ranzr (random generators, dice roller, spin the wheel).