hi. Diane Lee has taken that article off her website so i haven't passed it around...
The key thing is that if you try 4 different ways to get it and the person still can't do it, fix the other problems like the joints and muscle spasms etc. Then try again.
Some people actually have LM that works just fine - have you tried the prone hip extension timing assessment? It should be LM, then Gluts then Hams. I think you will find most people with dysfunction usually have LM first then Gluts and Hams.
To isolate you LM is a Motor Learning Skill - it is a test of skill learning! You can ask some athletes who have perfectly fine LM contractions to isolate it and they can't - that is because it is a backward step for them to do it.
However, since people with dysfunction have a motor pattern in which they are limited to, learning to isolate breaks that pattern. It is then you can reintegrate the new pattern into the movement.
So rather than following a receipe of isolate, co-contract, integrate, we should actually assess whether people have all the muscles working as a team during a task like Active SLR then assess at what stage they need to begin their rehab.
I find that i start at co-contract more often than not and go from there.
Thanks!