Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
I completely disagree. Physical strength is not the only sort of strength, and it's stupid to think that just because person is strong physically they must be the strongest in other ways. Some of the physically weakest people I've ever known have been the strongest in character and determination, often because of the things with which they are struggling. Endurance is not exclusive to runners and other athletes. While I'd choose not to have had this experience of PE and resulting heart problems if I had a choice, I will not deny that it has made me stronger and better in ways that I couldn't have imagined before PE. So yes, it can make you stronger if you're not so arrogant as to believe you were perfect before it and allow yourself to learn from the experience.
In the end, blood clots are an equal opportunity offender. They can strike an athlete or someone who's overweight and sedentary. They can strike average people with no risks, as we've seen on this forum and the DVT forum. They can strike young and old, male or female. No one ever thinks they're going to get a blood clot- that's not exclusive to athletes.