• Introduction
  • What is reaction time in sports exactly?
  • Different types of reaction time in sports
  • The physiological factors of reaction time in sports
  • The mental and environmental factors of reaction time in sports
  • Benefits of reaction time in sports
  • Here’s how you train for faster reaction time
  • Final thoughts
  • Sources


When thinking about speed in sports, the first thing that comes to mind is usually maximum speed. However, that’s not the most useful speed attribute in most cases. The reason behind this is that it takes a relatively long time to accelerate into your top speed. Instead, most sports rely on quick accelerations and decelerations, agility and lightning-fast reaction times.

This post explains the basic mechanics of reaction time in sports and what makes it so important for athletes and active individuals alike.

What is reaction time in sports exactly?

Reaction time describes the time interval between an external signal and your reaction to it. The most simple example of this is hearing a starting pistol and accelerating towards the finish line. Of course, similar situations can be found in all court-based sports where you have to quickly adjust to changing situations.

And, unlike reflexes, where the information goes straight to a muscle from the spinal cord and doesn’t involve the brain, reactions need to be processed first. Thus, your brain decides whether the stimulus is important enough to respond to – and how to do it most efficiently.

Reaction time is dependant on three main factors;




In a sports context, a stimulus can be either visual (seeing), auditory (hearing) or kinesthetic (touch) depending on the activity. Once the signal is perceived through the sensory system (part of the nervous system responsible for processing sensory information), your brain quickly processes the information and responds by sending a message down the spinal cord to the right muscles and creates a contraction. 

Therefore, your reaction time is a result of these three components working together. If one of them is hindered, your reaction time will be longer as a result. However, bear in mind that since reaction time requires a physical response from your muscles, it is not the same as processing speed, which describes how fast you can detect a signal. Hence, why fast reaction time is often associated with good reflexes.

Different types of reaction time in sports

Reaction time can also be divided into simple reaction time and complex reaction time.

Simple reaction time refers to reacting to a single stimulus and is usually very fast (around 0.13-0.18s). This is due to the fact that there is only one stimulus and one response to it. For example, reacting to a starting pistol during a 100m sprint is a simple reaction time task.

Complex reaction time, also known as choice reaction time or compound reaction time, describes the time it takes to respond to the correct stimulus out of many stimuli and responding to it in the best way possible. However, since the brain receives more information from the environment, it also takes a slightly longer time to process. This is also known as Hick’s law. One example of a choice reaction time is a soccer player who needs to react to the movement of the ball and other players on the field.

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Quicker decision making can slow down the game around you and help maintain balance in sudden situations.

The physiological factors of reaction time in sports

There are a few factors that can affect your reaction time in sports and life in general. These include genetics, sex, age, cognitive abilities, training background and even body temperature. All of these factors have their own impact on how fast your reaction time is and how well you can improve it.

Genetics and reaction time go hand in hand. Unfortunately, reaction time can only be improved around 10-20% outside of these biological factors. This is due to the fact that reaction time is hardwired into our bodies through nerves and therefore impossible to improve. However, there is always that small improvement you can achieve if you’re willing to put in the work.

Sex can also have a small effect on reaction time. On average, males and females have a similar muscular contraction time. However, males show stronger motor responses which result in faster reaction times. One thing to keep in mind is that this data is somewhat old and these differences are becoming smaller and smaller. This is partly due to females having a better opportunity to participate in fast-paced activities like motorsports and eSports.

Age can have a significant effect on your reaction time. In fact, there are signs that your brain’s response time starts steadily declining at age 24 at a rate of approximately 0.5ms/year. However, studies suggest that your ability to detect a signal stays similar even as you grow older while the response time to the signal becomes slightly longer.

”Reaction speed may well be the most important skill a goalie can have.”

Fatigue is a crucial factor in reaction time. This is due to the fact that once your nerves get tired they are not able to send or receive messages as efficiently as before. These factors are especially apparent if you are under severe physical stress or suffering from sleep deprivation. Even substance abuse can have similar effects for your reaction time. Thus, fatigue leads to longer reaction and response times, which can be detrimental in a variety of sports scenarios.

Training background can also have a big effect on reaction time in sports. On average, simple reaction time is between 0.16s to 0.2s among most people. However, top-tier athletes have shown reaction times as low as 0.15s which of course means faster acceleration in very high-intensity sports. However, even the best sprinters cannot go below 0.1s. Reaction time can also be practiced and maintained, but it needs consistent training.

Body temperature also has an effect on your reaction time. According to some studies, the optimal reaction time occurs at higher body temperatures. Furthermore, as the body temperature cools down, your reaction time will become longer as a result.

The faster your reaction time is, the more time you have to process what happens on the field and make the right decision.

The mental and environmental factors of reaction time in sports

Reaction time isn’t just a result of your biology. You see, there are also a few environmental and mental factors that can affect your reaction time in sports. These include alertness and tiredness, some cognitive abilities, the intensity of the stimulus, personal experience and environmental distractions just to name a few.

The complexity of the stimulus itself is one of the main factors in reaction time. This is due to the fact that simple reactions do not need the same mental power as more complex reactions. Additionally, even the perception mechanism of the stimulus plays a part in how fast you can respond. Visual being the fastest way to respond to a stimulus, followed by hearing.

Alertness and fatigue also have a strong correlation in reaction times in sports. Studies have shown that being too tired, too relaxed or even too tense will result in longer reaction times. This means that you must be well-rested, mentally ready and laser-focused during an athletic performance.

Anticipation and experience are also crucial factors for reaction time in sports. This is because you also have to be technically and tactically ready for the stimulus and act accordingly on the field. This means using the skills and experience you have learned in your sport to know when and where the stimulus might occur. Thus, it is easy to see why concentration, observation and split-second decision-making are crucial skills for an athlete.

”Your experience will help you anticipate when and where the stimulus might occur.”

Some cognitive abilities such as higher IQ have been linked to faster reaction times in some studies. However, the actual mechanism for this is still unclear. One theory is that individuals with higher IQ may show better focus and attention or have more effective information processing in the brain.

Distractions are also common in elite level sports. Sometimes background noises such as whistles, yells or chants may disrupt your thought process and hinder reaction times. In fact, even poor vision can significantly delay your reaction times due to having less visual feedback. Therefore it is all the more important that an athlete can mentally phase out all unnecessary distractions and try to train in well-lit conditions.

Benefits of reaction time in sports

Reaction time can have an enormous effect on your athletic performance as well as your overall wellness. This is especially apparent among the older population where lower reaction time can lead to falling or slipping, which can cause severe debilitating injuries.

From an athletic standpoint, reaction time can be a determining factor in whether you win or lose. For example, a boxer needs to be able to dodge lightning-fast punches and try to find a perfect opening to strike. While the significance of reaction time varies from one sport to another, your ability to react to your opponents moves or even adapt to a spin of a ball can determine whether you come out on top or not.

For example, in badminton, the fastest racket sport in the world, world-class players are able to smash the shuttlecock at a whopping 418kmh/253.33mph. In tennis, the average first serve is around 185kmh/115mph, which means that if you want to stay ahead of your competition, you need to be able to react incredibly fast.

Thus, good reaction time is one of the most important skills to have especially when you have little space on the field. In a way, quicker decision making can slow down the game around you and help you maintain balance in sudden situations. It may even help you read your opponent’s bodily cues to instinctively make the right move at the right time. Additionally, reaction time may well be the most important skill a goalie or an esports athlete can have.

Reaction time is important in a variety of esports, court-based sports, field sports, motor sports and track sports.

Here’s how you train for faster reaction time

While every athlete is different and some training methods may yield better results, the most consistent way to improve reaction time is cognitive training or brain training. This means using specifically designed training methods that aim to improve your brain’s neural networks. As a result, your brain will create stronger and healthier connections that provide quicker responses with less mental effort. Therefore, you will be able to improve skills such as memory, attention, problem solving and reaction time.

The reason why we are able to improve our cognitive skills is due to neuroplasticity, or brain plasticity. It describes the brain’s ability to dissect information and adapt according to our past experiences and environmental needs. While neuroplasticity is an important factor in cognitive learning it is also imperative for motor learning as well.

Since reaction time has a strong connection to cognitive ability, it must be trained accordingly. In fact, the most effective way to train it is to condition yourself to act reflexively according to a stimulus in a sports-specific context. One thing to keep in mind is that reaction time is hard to train and requires constant training. Additionally, most reaction time training sessions should be short because these exercises need full focus and attention.

Reaction time drills often focus on quick decision making during in-game situations. For example, sitting or standing in different positions (backwards, one knee or athletic position) and accelerating once the coach blows the whistle.

We’ve also created an article about reaction time training filled with valuable information. If you want to know how to include reaction time drills to your workout routine or take a look at our selection of samples, feel free to click the button below.

Final thoughts

Quick reaction time is not only crucial for athletic performance but your overall wellness as well. You see, being able to quickly adjust to suddenly changing situations, like slipping on ice, can have a tremendous impact on your overall health. This is especially apparent among our aging population. Thus, being able to avoid these issues can help maintain a healthy life and avoid healthcare costs at the same time.

As far as athletic performance goes, fast reaction time can have an enormously beneficial effect in sports that require short spurts and quick thinking during competition. This includes a huge variety of esports, court-based sports, field sports, motorsports as well as track sports. So, including some reaction time exercises may not be a bad idea if you are looking to become a better athlete.

One thing to keep in mind is that since reaction time has a constant decline as you grow older, you must also train it consistently and with enough variability. You can even train it at the same time as acceleration or maximum speed.

Training is not the only thing an athlete needs to become a more formidable opponent. You also have to balance it with the right nutrition and sufficient rest to maintain progress and stay healthy.

But before you go, here’s a quick recap of good reaction time in sports:

  • Improves the ability to react to an external stimulus
  • Shortens the time between stimulus and power production
  • Improves balance in sudden situations
  • Faster thought process during in-game situations
  • Needed in all sports

Did you learn anything new about reaction time in sports? Let us know in the comments!


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