Avoiding ACL Re-Rupture
I find that the main reasons why people re-rupture or injure their old ACL knee is because they simply take their eye off the ball and stop doing their prehab or gym based rehab.
A knee that has been reconstructed in the past needs constant maintenance and reviews to make sure it is not getting weaker over time without the person knowing.
Weakness leads to muscle wasting which can lead to altered landing and running mechanics which can lead to injury.
I would advise people who have have an old ACL reconstructed knee to get it reviewed every year to avoid major issues in the future.