Each bean contains 0.8 - 2.5 % caffeine. For your information in an average cup of coffee you have 75mg caffeine. One cup of coffee contains around 25 coffee beans, and you are not getting the full coffee bean in coffee, so the caffeine can add up if you eat a lot.
The reason why temperature effects muscles is because of the numerous atoms in the body that react to temperature. When the air, or body temperature is colder the atoms tend to stay closer together, causing less movement...when it is hot, the atoms (molecules) move around more, causing more range of motion. It also allows blood to flow more easily when it is warm than cold.
however she said our body s ability to control temperature or thermo regulate does involve blood circulation in the cold the small blood vessels on the surface of our body get smaller to keep warm blood deeper inside in the heat they dilate to release heat from the body over all how warm or cold a person feels has more to do with our perception of temperature than with our actual temperature she said