Marta Vidal Cortada
2007
Interactive mini teaching unit (MUD) on physical force. It defines the idea of force and the different types and points out the benefits derived from greater force. It also includes training methods to increase force and the importance of doing it properly. Muscular contraction, body position, muscle tone, repetition, series and pause are also explained.
http://www.edu365.cat/eso/muds/ed_fisica/forca/index.htm