Research actually suggests that range of motion isn't increased more via PNF than static stretching. Where 2 groups have followed each regimen, and then have been 'externally manipulated', measurements are the same (or slightly in favour of static stretching).
But I suppose stretching is a more complex issue than simply 'how far can a limb be pushed in one direction before tissues refuse to budge any further?' Lots of it is about the individual's perception of the stretch, and all the feedback mechanisms involved (golgi apparatus blah blah) i.e. static stretching feels pretty unpleasant unless it's very mild, so you tend to avoid going as 'deep' as you need to for any kind of progress.
Research actually suggests that range of motion isn't increased more via PNF than static stretching. Where 2 groups have followed each regimen, and then have been 'externally manipulated', measurements are the same (or slightly in favour of static stretching).
But I suppose stretching is a more complex issue than simply 'how far can a limb be pushed in one direction before tissues refuse to budge any further?' Lots of it is about the individual's perception of the stretch, and all the feedback mechanisms involved (golgi apparatus blah blah) i.e. static stretching feels pretty unpleasant unless it's very mild, so you tend to avoid going as 'deep' as you need to for any kind of progress.
I'm rambling.