Science project

The Effect of Video Games On the Body

Can playing video games change your blood pressure, breathing rate, heart rate, and pain tolerance?


  • Toothpicks
  • Watch
  • Notebook
  • Pencil
  • Blood pressure monitor
  • Ruler
  • Action video game and console
  • Stopwatch
  • Notebook
  • Pencil
  • Ball


  1. To begin this experiment, you’ll need an exciting video game that’s fast-paced and involves danger.
  2. Find a few friends to be your test subjects. When you’re collecting your data, take note of your test subjects’ ages, genders, and experience with video games to see if you can find any trends or patterns correlating with those variables.
  3. Begin by taking your first test subject’s breathing rate. Set your stopwatch for a minute and count the number of breaths your friend takes. Record it in your notebook.
  4. Now, take you friend’s pulse. Place your fingers under your friend’s jaw and slightly off to the side, a push in gently until you can feel a pulse. Again, set your stopwatch for a minute and count the number of times that your friend’s heart beats. Record it in your notebook.
  5. If you have access to a blood pressure monitor, place it around your friend’s arm, and read her blood pressure measurement. Record it in your notebook.
  6. Now, test your friend’s reaction time. The procedure for testing reaction time can be found here.
  7. Finally, test your friend’s pain tolerance. Have her look away, and poke her ten times on the arm with the toothpick. Be gentle! Have her count how many pokes she can feel.
  8. Now, turn on the video game. Have your friend play the game for ten minutes. Make sure that you’re playing through some intense action sequences.
  9. Immediately after your friend stops playing, take her breathing rate and blood pressure. Record your data.
  10. Resume gameplay for five minutes.
  11. Pause the game. Take your friend’s pulse and test her reaction time. Record your data.
  12. Resume gameplay again for another five minutes. Then begin your poking test while your friend is still playing. Poke her arm 15 times and then pause the game. Ask her tell you how many times she was poked, and record your data.


When you get excited by video games, your heart rate, breathing rate, and blood pressure increase. Your perception of pain decreases, so you’re less sensitive to being poked. Reaction time should also improve.


Your body works in many amazing and quiet ways. Right now, you are breathing, and probably digesting food. Your heart is beating, and you don’t even have to think about it. Your body’s systems help maintain a state of homeostasis, where all internal processes are stable and constant.

The sympathetic nervous system is one of your body’s regulatory mechanisms. One of its jobs is to deal with stress. The nervous system is programmed with a fight-or-flight response (also called the acute stress response) to increase your chances of survival if you find yourself in danger. This response is triggered instinctively in reaction to a perceived threat to survival rather than activated consciously or by choice, and adapts your body’s systems to prepare you to either fight that danger or to evade it by running away. So when your mind is focused on watching a scary movie or playing a video game with intense action, even though you may not actually be in real danger, your adrenal medulla gland still springs into action because of your stressed state. It releases hormones and a rush of adrenaline that could help you fight or get away by increasing blood pressure, heart rate, and breathing rate, turning fat into available energy, suspending digestion, and dilating pupils.

All of these factors work together to increase your strength and speed. Did your subjects’ reaction times improve? Dilated pupils help you see more clearly, and muscle tension and increased blood flow readies your muscles for action and amplifies your agility. Were your subjects’ hands sweaty after playing for a while? During an adrenaline response, your body increases perspiration to prevent overheating due to the higher rate that you’re expending energy. Your body even increases how fast your blood coagulates so that if you’re injured, you’ll experience less blood loss. Decreased or no perception of pain, called analgesia, is also an effect of these life-preserving hormones.

All animals are equipped with a survival response. The flame scallop shoots water out of its shell to flee in the opposite direction. Blue-tailed skinks detach their brightly-colored tails to distract predators while they scurry away. The stingray thrusts out its poisonous barb as a defense. Other animals excrete venom or go rigid to appear dead.

Although in our modern age, unlike prehistoric humans, we do not rely on the fight-or-flight response for our daily survival, it still functions in the times when we do encounter danger, or when we subconsciously perceive a threat. There are many recent recorded instances of adrenaline response provide superhuman strength—people lifting cars, wrestling bears, leaping inconceivable distances for their or others’ survival, completely unaware of injuries they had sustained.

Going Further

Take a look at your test subjects. How did the stress response in males differ from females? Were your friends who regularly play these kinds of action video games more or less affected by the video game? Did age factor in to your test subjects’ reactions? The more people you include in your experiment, the more insightful your data and conclusions will be.

Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items