The article describes an experiment in which scientists investigated how the brain perceives exertion during exercise. Before riding the bike, the tendons of the participants vibrated. They were then able to develop more power while cycling. The measurements showed that both their muscles and their hearts worked more intensively. Despite this, participants did not report feeling more strained. This resulted in a discrepancy between the actual physical load of the body and the subjective feeling of exertion. The main finding is that changing signals from the body to the brain can make a challenging exercise subjectively less difficult, even though it is objectively more intense.