That looks tyre-ing! Cameron Diaz and Alex Rodriguez work up a sweat on tough assault course

By DAILY MAIL REPORTER Wheely hard work: Cameron Diaz lifted an enormous tyre during a work-out in Miami, Florida, yesterday For some, lifting a humble dumbbell can be a challenge.But Cameron Diaz really upped the ante during her latest fitness session with her athlete boyfriend, Alex Rodriguez.The actress was spotted lifting up a giant tractor tyre during a gruelling outdoor work-out in Miami ...