There are a number of studies from a couple of scandinavian groups which show some very interesting results. Essentially the general guideline involves eccentric type exercise as this seems to be more superior to other modes, both in reducing recurrance rates and speed of recovery. Having said that, one has to classify the type of hamstring injury for prognostic outlook as stretch injuries affecting the semitendinosis free tendon region is more problematic than the biceps fem injury usually associated with speed-tears. I would recommend reading carl askling and kristian thorborg for some very useful information.

I enclose a couple of refs for your interest. Enjoy.

Another one for your interest

One last one

Here s one

Your information has been very valuable, as I'm involved with a project regarding: Protocols for return to play with elite athletes recovering from hamstring injuries. Thank you.

I have more researches on this topic, but I think this is the best. But if you want i will post the other ones as well!?

Yes, please add you references. I will include the prominent references that I have been reviewing, then will complete a lit review of the info.

Stretch, stretch, stretch....! The nature of this muscle tends to get tight rather than being inhibited. whether in shortened or lengthened position, it doesn't like and bear tension and responds with strain and in long term, it may change the biomechanics of nearby joints through postural disorders such as sway back posture or flexed knee

And also with a lumbal lordosis postural disorder, lumboischialgia, and other lower back pain

Dear collegues,

In hamstring rehabilitation it is very important to consider the specific function of the hamstrings. Especially biceps femoris plays a role in control of the pelvic (sacroiliac) joints. When control of the pelvic joints is impaired, and there are indications that in many sports this can be the case, hamstring tension will increase. In these cases stretching, as Shahrzad suggests will not do the trick, since the hamstrings are busy solving another problem. You should focus at improving pelvic control!

Excuse me, I wanted to attach some more files. They descibe the anatomical attachment of the biceps with the sacrotuberous ligament, the in vivo impact of biceps on SI stiffness and altered coordination in pelvic pain patient, involving the hamstrings.

And the final one