For anyone who's wondering if their knee is ready to return to skiing, there's a post-ACL injury return to sports test that you can administer yourself with a bit of space. It's called the Hop and Stop test.
You can get the full details on
this website, including a free score sheet that will do the calculations for you but here's the "quick" description:
Hop test:
- write down your height in meters (inches*2.54/100)
- set up a measuring tape on the ground
- stand on one leg with your other knee held up at hip level and with your hands on your hips
- hop as far as you can, landing on the same leg. When you hop, don't let your up knee drop too far in the "wind up"
- write down how far you hopped. it's ok if you don't stick the landing as long as you can see where you initially landed - or get someone to read the distance for you.
- do this 3 times on the same foot.
- take an average of the 3 scores, and convert to m
- divide the average by your height. Ideally you want this to be between 79% and 82%. If it is less than you should think about strengthening.
- do the same on the other side (remember that many people tear their other ACL when they return to sport, so definitely test the "good" knee too)
Leap test:
The same as the hop test with two differences:
- land on the opposite foot (so start on right and land on left)
- you have to stick the landing within 1 second. so if you wobble for more than 1 second, the leap doesn't count and you should try again.
- To score this one, divide the average of the leap FROM the right by the right hop. This should be 109 to 116%.
This is the score that's particularly important - if you are strong (hop) but are not able to control that strength (landing) then that suggests you are at a higher risk of re-injury.
There's lots you can do to address this - and often it doesn't take long. One of the best things you can do is set up three low hurdles (or even just a line on the floor) and hop sideways (start and land on same foot) but make sure you "stick" the landing before you hop again. Do 2-3 sets of this going in both directions on both feet but give yourself at least a minute rest between sets. You will probably find it won't take long to get better at it.
You can do the same thing with hops forward onto a low box.
In fact you could probably skip the test and just try doing the hops every couple of days for a few weeks.
Elsbeth