Sport Relief Mandela outside the Union Buildings in Pretoria, covering , in temperatures in excess of , and raising £1,648,087. He had attempted this effort in 2012, but was forced to back out due to health concerns. In 2014, Davina McCall took on a Sport Relief challenge to raise money for the appeal. This was called "Davina: Beyond Breaking Point", which saw the presenter tackle bike riding, running and swimming for seven days as she travelled from the north of the country (outside Edinburgh Castle) to the end (in Central London). Alex Jones also took part in a Sport Relief challenge which
Challenge point framework surgeons). The optimal challenge point represents the degree of functional task difficulty an individual of a specific skill level would need to optimize learning (Guadagnoli and Lee 2004). However, this learning depends on the amount of interpretable information. Therefore, although increases in task difficulty may increase learning potential, only so much is interpretable, and task performance is expected to decrease. Thus, an optimal challenge point exists when learning is maximized and detriment to performance in practice is minimized. With increased practice it is assumed that one's information-processing capabilities will increase (Marteniuk 1976). Therefore, the optimal challenge point will change as