According to psychologists, running is the best way to get rid of tension. Running boosts your serotonin levels and releases endorphins, the happiness hormone.That's why, if something's bothering you and you go for a run, the problem isn't so bad once you come back. Running doesn't only burn up calories. It especially burns up stress.And Madrid is a particularly stressful city. Young people in Madrid live in an environment that stimulates tension and running could be the best solution because no problem can withstand a good run.