Although there has been much opposition against gender equality in sports, there has been a huge increase in the participation of females in sports within the last 30 years. Women were not expected to play sports since it went against the female gender role. Therefore, women did not have the opportunity to play a sport even if they wanted to since all sport teams were male.
Social class refers to the hierarchal distinctions between individuals or groups in society. These distinctions are based on “a combination of income, wealth, education, occupation, and social connections (Coakley, 322). According to Coakley, ones social class begets his or her life chances. 
The Bod Pod uses a method called air displacement plethysmography to measure body volume and body density. It's a good alternative for oeople who cannot or do not want to perform underwater weighing.