short VS prolonged stretch

[Guest guest]

Hi supertrainers....

Is there likely to be any difference to the way I perform any

exercise (be it training or competition) DUE to the length of time I

stretch?

Does it make a difference to my performance, whether I stretch muscle

groups for 5-7 seconds OR do a longer stretch of 20-30 seconds prior

to exercise?

Thankyou group!

Giles

Sydney Australia