And, as others point out for manual workers, they don't fully recover. As it's their job, many professional athletes will perform while partially injured and exacerbate it. And it's not even professionals! One of the older men in my tri club has a permanent Achilles injury now in his 60s because of an injury sustained when he was younger. The doctor told him to rest for a month to let it properly heal. That weekend he was running a sub-30 10k at the local league competition!
And, as others point out for manual workers, they don't fully recover. As it's their job, many professional athletes will perform while partially injured and exacerbate it. And it's not even professionals! One of the older men in my tri club has a permanent Achilles injury now in his 60s because of an injury sustained when he was younger. The doctor told him to rest for a month to let it properly heal. That weekend he was running a sub-30 10k at the local league competition!