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Roula Kotsifaki Profile picture
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Mar 8 • 7 tweets • 4 min read
#ReturnToSport testing after #ACLR:
What’s hot, what’s not?

Summary figure based on the below papers:
bit.ly/3IUZizo
bit.ly/41PbDOe
bit.ly/3muCFdS
bit.ly/3YonuzS
bit.ly/3ZJgLBK
bit.ly/3SUmqD4
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More from @RoulaKotsifaki

Roula Kotsifaki Profile picture
Feb 9, 2022
Which performance metrics DON’T normalize at #RTS after #ACLR?
Spoiler: jump height and Reactive Strength Index during a single leg drop jump

What are we missing?

#OpenAccess🔓#OnlineFirst

🔗bjsm.bmj.com/content/early/……

Check this thread! 👇
Why vertical jumps?

In our previous work, we found that vertical jump performance (height) is a more representative metric for knee function than horizontal hop performance (distance) in healthy individuals.

bit.ly/3wRgDCJ
What is going on with athletes after #ACLR at the time they are cleared to #RTS? So, we studied their biomechanical status during a single leg vertical jump and the reactive phase of a single leg drop jump
Read 10 tweets
Roula Kotsifaki Profile picture
Dec 11, 2021
Triple hop for distance as a decision to #RTS after #ACLR.
Symmetry in distance masks asymmetry in knee function! doi.org/10.1177/036354……

@AJSM_SportsMed @RodWhiteley @Aspetar
@RoaldBahr @KorakakisV @IJonkers

#onlineFirst Check this thread! 👇
Image
Why triple hop?
During many sports, it is unusual for an athlete to be required to make a single movement such as an isolated jump or hop.
Triple hop provides additional information about the patient’s ability to absorb and release energy during consecutive plyometric loading. Image
Read 10 tweets
Roula Kotsifaki Profile picture
Mar 10, 2021
Are you using hop distance as decision to #RTS after #ACLR?

Symmetry in distance hides asymmetry in knee function!

dx.doi.org/10.1136/bjspor…

Check this! 👇
We measured athletes after #ACLR during propulsion & landing of a single leg hop for distance after they have been cleared to #RTS

During propulsion symmetry in work done by the knee is only 69% & during landing it’s 81%, despite achieving 97% of hop distance
The relatively large between-leg knee work difference is easy to miss as the knee joint contributes little (12%) to propulsion in a single hop for distance.
Read 13 tweets
Roula Kotsifaki Profile picture
Feb 10, 2021
Hop testing after #ACLR – horizontal (distance) is easier to measure than vertical (height) but are they the same?
(Spoiler: not even close)
Thread 👇 Image
During a vertical hop, the hip, knee, and ankle contribute almost equally, during push-off (height achieved) and landing (force absorption). Image
Horizontal hop is very different.
Work during propulsion (=distance achieved): knee contributes only 13% but the landing phase (absorption) is done 2/3 by the knee. Image
Read 5 tweets

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