The Statute of Physical Limitations

Shumanay has a chronic illness that's limited her physical activity in the past, but she's recently been able to take up running. Now she has her heart set on an endurance race to take full advantage of her newfound abilities. Her husband Jon objects to her participation. Jon worries about the risks to her health, and thinks she should save her energy for a more worthy form of exercise. Should Shumanay run the endurance race?