Because the stored energy is getting flowed through the body when the exercise starts and the energy goes to the parts or muscles of the body that are being used for example when you do curl ups your energy goes to your stomach area or your abs because they are getting stronger.
Droplet Precautions are used to prevent the spread of pathogens that are passed through respiratory secretions and do not survive for long in transit. These droplets are relatively large particles that cannot travel through the air very far. They are transmitted through coughing, sneezing, and talking.