Olympic and marathon athletes prepare for major competitions, with Usain Bolt targeting record times at London 2012 while distance runners face health challenges and qualification deadlines.

Usain Bolt sets ambitious goals for London 2012, aiming to run 9.4 seconds in the 100m and 19 seconds in the 200m to "amaze" the world at the Olympics.

UK Athletics head coach Charles van Commenee expresses confidence that Team GB can achieve its target of eight medals at the London Olympics despite competitive pressures.

UK Athletics commits to purchasing tickets to guarantee athletes' friends and families can attend and support them during Olympic performances.

Emmanuel Mutai is determined to defend his London Marathon title in Sunday's race despite recovering from typhoid fever contracted last month.

Former marathon world record holder Haile Gebrselassie abandons his Olympic dream, deciding not to compete in the London 2012 marathon.

Guernsey's Lee Merrien enters Sunday's London Marathon in peak form, attempting to secure Olympic qualification in the marathon event.

Olympic 400m hurdles gold contender Dai Greene announces his Diamond League season opener will take place in Rome on May 31, 2012.

Haile Gebrselassie defeats Paula Radcliffe in Vienna's "Emperor versus the Queen" half marathon showdown, demonstrating continued competitive form.

British motorcycle riders intensify their competition for Moto2 and Moto3 titles in the 2012 season, with racing outside the top class proving highly competitive.