9 ways to improve your reaction time, from sleep and caffeine to action games, drills and a faster setup. Includes reaction time exercises and gaming tips.
Published October 28, 2026
To improve your reaction time, you have to work on everything around your reflexes. The signal from your eye to your hand travels at a speed you cannot train, but sleep, alertness, preparation and practice decide whether you click in 200 milliseconds or 300. Most people land near the middle: the median of the 70,940 results Human Benchmark grades its reaction test against is about 230 ms.
Here are 9 ways to get faster, each with the research behind it, plus exercises you can do at home and tips for gaming. Take the HumanRank reaction time test first, so you have a baseline to beat.
5 attempts, click the moment the panel turns green. Get your baseline before you try the tips.
Take the reaction time test
Yes, within limits. A reaction has three parts: your eye and brain detect the signal, your brain decides to act, and your muscles move. Nerve conduction is fixed, but detection and decision depend on how alert, focused and ready you are, and the movement depends on where your finger already is. That is where the milliseconds hide.
The effect sizes are rough rankings from the studies cited below, not measurements of how much your own score will move.
Sleep has the biggest effect on this list. In a 2000 study by Williamson and Feyer, 39 adults stayed awake for up to 28 hours and, on another day, drank measured doses of alcohol. After 17 to 19 hours without sleep, performance on some tests was as bad as or worse than at 0.05% blood alcohol, and response speeds were up to 50% slower on some tests. Fatigue also makes you inconsistent: a few very slow reactions drag your average down even when your best run looks fine.
Your first few reactions of a session are usually your slowest, while your attention settles into the task. Before a run that counts, do a few practice rounds, or play a minute of something fast. Many competitive players warm up in an aim trainer before a match for the same reason.
Caffeine is one of the few substances with solid evidence for faster reactions. A 2016 review by McLellan, Caldwell and Lieberman found that alertness, attention and reaction time improve from about 40 mg, less than half a cup of brewed coffee, up to about 300 mg. Take it 30 to 60 minutes before you need to be sharp. Past that dose, jitters and a racing heart can make you twitchy and prone to false starts.
A short bout of exercise wakes you up. A 2012 meta-analysis of 79 studies by Chang and colleagues found a small positive effect of acute exercise on cognitive performance, during exercise and in the hour after. A brisk 10-minute walk or a few sets of jumping jacks will not change your nervous system, but it can beat playing straight after a long stretch on the sofa.
Action video games are the best-studied way to train reaction speed. In a 2009 review, Dye, Green and Bavelier found that regular action game players responded about 11% faster than non-players across many lab tasks, with the same accuracy. When non-players trained for 50 hours over 8 to 9 weeks, those assigned to Unreal Tournament and Call of Duty 2 got 13% faster, twice the 6% gain of those who played The Sims.
The effect is debated: a 2014 study by van Ravenzwaaij and colleagues found no speed gain on simple perceptual tasks after action game training. The gains seem largest when you must find and pick the right target, not just press a button at a light.
Practising the exact task you want to get faster at works best. A few runs a day of the reaction time test teach you its rhythm, and the Aim Trainer adds the mouse movement that games need. Away from a screen, the ruler drop and ball drop below train the same skill. Short daily sessions beat one long session a week, because fatigue slows you down after a while.
Good tests wait a random time before the signal: 1.4 to 4.2 seconds on HumanRank. Clicking on a hunch does not make you faster, it makes you jump. On HumanRank an early click counts as 999 ms, so one false start adds about 150 ms to a 5-attempt average. Stay relaxed and react to what you see, not to what you expect.
Every millimetre your finger travels costs time. Rest your fingertip on the mouse button or the Space bar, pressed lightly so the click only needs a short push. Look at the centre of the panel, not at the score, and keep your hand relaxed: a tense forearm reacts later and jumps more often. Switch off music and notifications for the run.
Part of your score is your hardware. A 60 Hz screen draws a new frame every 16.7 ms, a 144 Hz screen every 6.9 ms and a 240 Hz screen every 4.2 ms, so a faster screen shows you the signal sooner. Use a wired mouse or a low-latency wireless one, turn on your monitor's game mode and close heavy tabs. None of this makes you react faster, but it stops your setup from adding milliseconds, as explained in average reaction time.
A falling ruler covers d = ½gt², so the reaction time is the square root of twice the distance divided by gravity (9.81 m/s²). There is no screen or mouse delay, so ruler times usually come out faster than a browser test.
In shooters like Valorant and CS2, raw reaction time matters less than you think, because good players avoid having to react at all. Keep your crosshair where enemies will appear, so a reaction only needs a click, not a flick across the screen. Learn the common angles, so you know where to look. Then train the rest:
To see what top players reach, check the reaction time leaderboard or the best human benchmark scores in every game. To see how jobs and age compare, read reaction time by profession and F1 reaction time.
Yes. Nerve speed is fixed, but sleep, caffeine, warming up, practice and a lag-free setup can all make you faster. Action game players respond about 11% faster than non-players in lab tasks, and 50 hours of action game training cut reaction times by 13% in one set of studies.
Your score on a specific test improves within a few sessions as you learn its rhythm. Broader gains take longer: the action game training studies used 50 hours of play over 8 to 9 weeks.
Yes. A 2016 review found that reaction time, alertness and attention improve after about 40 to 300 mg of caffeine, roughly half a cup to three cups of brewed coffee. Too much can make you jittery and more likely to jump the start.
On a browser test with a mouse, about 230 ms is the median of Human Benchmark's 70,940 results. Under 200 ms is fast, and under 150 ms is exceptional.
Yes. People usually react 20 to 40 ms faster to a sound than to a light. In a 2010 study by Shelton and Kumar, the average was 284 ms for sounds and 331 ms for visual signals. That is one reason sprint starts use a gun.
Yes, gradually. Reaction time is usually fastest between the late teens and the mid twenties, holds through the thirties, then slows, mildly until about 60 and faster after that. The spread within one age group is still larger than the gap between age groups.
Action games such as shooters seem to. Regular players are faster in lab tasks with no loss of accuracy, and training studies found larger gains for action games than for slower games, although one 2014 study found no effect on simple perceptual tasks.
