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.
The hypothalamus of the brain works as the thermostat for temperature control inside the body. Throughout your body are temperature receptors that send feedback to the hypothalamus.If the hypothalamus receives indication that the body is either too hot or too cold, the brain will signal the body to react.For example, if you are outside on a hot day, temperature receptors on your skin will signal the heat to your hypothalamus which responds accordingly.hermoregulation. The body regulates its temperature by means of convection, conduction and evaporation. Convection is the change in temperature due to the movement of air or water over the skin, for example, a breeze while you are running.