No Masters athlete, no matter how fit you think you are, should just jump in and begin track and field training (or any other high-intensity sport such as cross-fit or hockey) without knowing your baseline.

As a Masters athlete, my wife is perhaps the best example I can use to illustrate this. In 2017 at age 43, she decided to switch from distance running to track and field, with the aim of running the 400m and 800m at a competitive level. While she had raced everything up to the marathon with some success, she was completely unprepared for what was coming!

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