Sport and Exercise Sciences is the application of scientific principles to sport and exercise. The key scientific strands within the sector are physiology, biomechanics and psychology. Sport and Exercise Science has become a key industry within the sport sector that currently sits in the top 15 industry sectors in England, contributing over £20 billion to the economy, almost 2.3% of the total. The number of sport-related jobs in the UK is estimated at over 400,000. The sector also has a large number of volunteers, with the estimated economic value of sport-related volunteering estimated as £2.7 billion. Additionally, participation in sport brings health benefits to the nation, which is currently estimated at £11.2 billion. The sector workforce is expected to grow over the coming years, meaning vocational qualifications for the sports sector are vital.