I'd be very interested to hear of any primary research for this because
despite a lot of looking I've found nothing.
My current theory is that force/length changes that are in effect for more
than an hour are due to plastic deformation, whereas changes that return to
normal are due to increased temperature during the stretching regime. The
plastic deformation would possibly account for the reductions in MVC often
seen after stretching.
If plastic deformation occurs it would be interesting to know whether
adaption/repair is to return to pre deformation size (repair) or adapt to
the new length (chronic change). There's weak evidence that stretching can
lengthen the musculotendon structure in the mid term. Perhaps stronger
evidence (form yoga) that over the very long term significant changes can be
made although this may be due to genetic self selection.
Regards
Joe Wright
[log in to unmask]
www.topracket.com/Badmintology
> Dear all
> Can anybody tell me the minimum time of stretching
> (eg;90 sec/60 sec etc )required to get plastic
> deformation or creep in prolonged manual stretching,Is
> there any literature to support it.I've read many
> literatures telling static stretching and prolonged
> stretching cause an increase in length by plastic
> deformation,or creep.
> Thanks in advance
>
> FADHEL
>
>
>
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