Hey guys, if you have yet to read this thread by hogman, I’d suggest that you take a look at it. The information also states that long-duration stretches cause more plastic deformation.
Here it is: High force versus Low force
Here is another link that I found that also provides info about long-duration stretches, and plastic deformation, which is basically permanent elongation in connective tissue (in biomechanics, its different in engineering mechanics, yet similiar).
This link is about 500 words long, and is written in a way that most of us can comprehend, and is not overly scientic.
For the most part, the doctor states that applying heat during long-duration stretches, with a low force, causes the most plastic deformation.
Here’s a quote:
Quote
Lehman and associates (1970) studied the effects of heat and stretching on rat tail tendons.6 The results indicated that heating alone produced no significant elongation and that stretching alone produced no residual elongation. Significant elongation occurred if heat and stretch were combined. A greater increase in length was maintained if the stretch was held during the period of cooling since “reorganization of the tissues is thought to occur during the cooling period.”6 Overall, the most effective method of producing a plastic deformation of connective tissue was to apply a sustained stretch during the application of heat and to maintain the stretch during the period of cooling.Similar experiments using rat tail tendons have been conducted by Warren et al (1976) regarding permanent elongation of connective tissue at various temperatures.16 The data showed that the application of low force over a long duration was very effective in producing slow elongation in the viscous elements, resulting in increased residual elongation. Furthermore, elevating tissue temperature and maintaining it prior to applying force was found to cause significantly less tissue damage. Lastly, the lower loads applied at elevated temperatures for prolonged periods were found to produce significantly greater residual elongation.16 The clinical implications of this study are three fold: first, stretches used to increase ROM should be held for prolonged periods; second, warming tissue prior to ROM exercises will cause less tissue damage; and third, stretching should be accompanied with the highest possible therapeutic temperature for prolonged periods to most effectively increase joint mobility.
Personally, I feel that this link just about warrants a thread of its own, but this thread is stickied, covers the same info, and has provided some great information, so I’m just adding to this great thread.
Oh, and here’s the link to that article. It is entitled Heat Application in Physiotherapy.
By the way, I’ve been wanting to write a thread asking, "is there a physical therapist in the house"? I did come across one member here in the last 4 years that claimed to be a physical therapist. Basically, by doing PE, we are performing a form of physical therapy on our penis. A biomechanics expert could possibly answer many if not all of our questions regarding frequency, time, weight, temperature, and rest.