Monday, March 4, 2013

LSJL Prototype Device designed by Yokota/Zhang

This study was actually published in 2005 but it's in an obscure space journal so I didn't find it until now.

Development of a Knee-Loading Joint Supporter for Potential Use in Preventing Bone Loss during Spaceflight/Aging

14 week old female C57/BL6 mice were used.  Knee loading was applied for 3 minutes for 3 consecutive days.  Peak force of 0.5N was used.  Groups were 5, 10, 15Hz.  5Hz was the one used to generate the most bone formation which doesn't mean it will translate into the most length but 5 Hz was used in the lengthening study.

Fig1 provides a diagram with a loaded mouse.

In Figure 3 they give the knee prototype.  In this study they blocked copy and pasting so you'll have to read the full study.

In the device there is a pad to avoid a local stress concentration on the knee.  Perhaps for LSJL foam could be placed in between the clamp and the knee.  Although the study above did not study any lengthening effects of LSJL.

Yokota/Zhang mention 10N being what is required for humans but again this was before they noted any LSJL lengthening effects.

Usage mentioned being approx. 30 min daily...per knee.  In this study the the outer part of the knee was the one loaded. Here's how a gear/cam mechanism works:



This ratcheting motion is very similar to a clamp.

2 comments:

  1. Hi, Tyler. I hope you could help me with this question.
    Do you know if muscles grow with bones?
    I'm an 18 yr old female and about to have a calf reduction surgery in August by partial resection of my gastrocnemius muscle. Do you think my bone can still grow without some of the gastrocnemius muscle?

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  2. Groups were 5, 10, 15Hz. 5Hz was hälsporre the one used to generate the most bone formation which doesn't mean it will translate into the most length but 5 Hz was used in the lengthening study.

    ReplyDelete