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Pro Bodybuilders eat about one gram (sometimes even 1.5 grams) of protein per pound of body weight or per pound of non-fat tissue. I'm sure you've seen that the recommended dail

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Showing posts with label ligaments. Show all posts
Showing posts with label ligaments. Show all posts

Tuesday, May 14, 2013

Is Yin Yoga Right for You?

by Baxter

We recently received two questions regarding a style of yoga known as Yin Yoga, in which one assumes certain yoga poses, often done sitting or down on the floor, and passively holds the poses for 3-5 minutes.  An example of a pose done in the Yin way would be Sukasana (Seated Crossed Legs) with a forward fold, done passively for the allotted time. As a disclaimer, I have limited personal experience with Yin Yoga, but have done several two hours sessions over the years.

According to articles that can be found online at Yoga Journal Magazine, as well as the websites of two well-known teachers of Yin Yoga, Sarah Powers and Paul Grilley, Yin Yoga is more than just doing yoga asana a particular way. There is a focus on not just affecting the physical structure of the muscles, bones and connective tissue, but reportedly also influencing the energetics of the body via stimulation of certain Chinese meridians associated with the acupuncture/pressure systems. And there is an emphasis by some teachers also on working with the discomfort that arises in holding the poses longer, as a form of meditation. The concern both of our readers brought up had to do with how safe it might be to stretch the joint stabilizers known as the ligaments via this approach to yoga asana. One of the readers self-identified as being very flexible already, in her 50s, and noted that after a recent Yin workshop (which she found wonderful on many levels), she was left with joint pain for days after the practice and possibly some chronic pain. She specifically wondered if Yin style of practice is safe for students who are hypermobile and don’t really need more flexibility in their joints.

I wish this was an easy question to answer. I might start by saying that there is probably a style of yoga best suited for each of our unique body types, and conversely, there are some styles of yoga less beneficial for you. Secondly, I would recommend, as Paul Grilley does in one of his balanced articles on Yin style of practice, that you need to proceed slowly and with lots of attention, sometimes to subtle body signals, as you try out a new style of practice like Yin Yoga, if you have never done it before. With Yang styles of practice, which is just to say more active asana styles where you are more likely to be engaging muscle groups on both sides of joint that is moving, you will experience what is called your “active range of motion” of your joints, meaning that which you can create by contracting the muscles around the joint alone. However, this is not the “full” range of motion for most joints.

In anatomy circles, there is another term to describe this second stage of joint movement, “passive range of motion,” which usually involves gravity or some other part of the body taking you past the active range of motion place. An example would be lying on your back and using your muscles alone to bring your knees into your chest, like an upside down Child’s pose. This would be the active range of motion of your hip and knee joints in flexion (bending forward). Now, if you take your arms around your shins and pull with your arms (your “outside” force), your legs fold in deeper, thus taking you to your passive range of motion. The idea here is that this may be good for your overall flexibility and joint health, as some compression of the joints seems to be good for the cartilage of the joints as we discussed in our posts on osteoporosis and arthritis. When you flip over and do regular Child’s pose, you now have the full weight of the body pressing down on your hip and knee joints and this might get you even more deeply into the full range of motion of the joint. The question is how much is safe and where do things get potentially troublesome. The answer to that, again, is not easy.

Most sources I can find suggest that keeping your connective tissues—like the fascial containers around all of your muscles—mobile is a good idea. They also suggest that ligaments, the usually smaller bands of connective tissue that keep two bones in a joint close together are not designed to actually stretch much at all without the risk of injury, tearing and chronic looseness. Two things to watch out for if you try out Yin type classes: do I have persistent pain for more than a day or so after class?  And do my joints feel too loose, wobbly or unstable after such practices? If neither situation arises, this style of practice may be fine for you. If either does arise, maybe this practice is not for you. A combination of a Yin type practice with an active Yang style practice may work well for some. And if props take away some of the physical intensity of sensation when you are in Yin poses, this could possibly be a safer way for some to try the longer passive holds of Yin style without causing joint pain or overstretching of ligament. So do experiment a bit and see what you can discover to find the style that works best for you. 

Tuesday, February 26, 2013

Holding It All Together, Part 1: Ligaments

by Baxter

As I was prepping for my upcoming workshop this Saturday on Yoga and the Musculoskeletal System out in Brentwood, CA (see Brentwood Yoga Center Workshops for registration information), I decided to look back at my old blog posts to see what I had written regarding tendons and ligaments, two of the main structures we’ll be talking about this weekend. And much to my surprise, I found that I had not yet addressed these basic and vital topics. So today I thought I’d begin a discussion on ligaments, anticipating that I’ll come back to tendons again in the future.

Let’s begin by looking at some basic definitions for these two structures. Both ligaments and tendons are composed of something anatomists call “connective tissue,” which is a collection of tissue types that often serve the function of keeping our different body structures together, and include such diverse tissues as the above tendons and ligaments, as well as fascia, intervertebral discs, cartilage in the ears and nose, cartilage coating the ends of bones and others. Connective tissues, depending on what their function in the body is, will either be more or less elastic by virtue of the proportions of the components that make up connective tissue: collagen and/or elastin fibers, which float in a semi-fluid gel called ground substance. According to Mel Robin, in his book A Physiological Handbook for Teachers of Yogasana, connective tissue works as a mechanical support or binder for other tissues, allows for food and waste from cells to move in and out, acts as a lubricant and is the body’s glue. 

So what then are the structures that ligaments glue together and what are the unique features of ligaments? Ligaments are specialized connective tissue that binds bones to bones. They keep the bones of your joints in close proximity so they don’t dislocate (which sometimes still can happen, in the shoulder joints, for example), and they allow for a certain amount of passive movement in some directions and restrict movement in others.  In fact, restraining movement is one of the main functions of ligaments. They happen to be high in collagen fibers and low in elastin fibers, which makes ligaments strong, but not very flexible. According to David Coulter in his book Anatomy of Hatha Yoga ligaments are:

“...made up of tough, ropey, densely packed inelastic connective tissue fibers, with only a few cells interspersed between large packets of fibers.”

Knee Joint (with ligaments)
Usually, the amount of stretch that can take place in a ligament is very minor, only around 4%, but there are exceptions, such as ligaments in the cervical spine region, which have been found to stretch up to 200%! In contrast, those around the knee joint have very little elastin, so are much more rigid to provide more stability to the joint. This can have relevance for our yoga practice. As an example, deep flexion (forward bending) of the neck as in Shoulderstand will not permanently overstretch the neck ligaments. But deep flexion (bending) of the knee as in Supta Virasana has to be approached cautiously and mindfully so as to not overstretch the supporting ligaments of the knee. If the ligaments are overstretched, they will not return to their original length and will be permanently loose and ineffective in stabilizing the knee. In general, you want to focus on stretching the muscle and not the ligaments in your yoga practice.

Another reason to avoid overstretching or, even worse, tearing a ligament, is that ligaments have a poor blood supply. Due to this poor supply, getting repair cells into an injured ligament and taking away the waste and injured material is more difficult, and healing is therefore slow. Also, ligaments have very few cells—which are the things that have to be stimulated in an injury to produce more fibers and fluid—and this contributes to slow healing as well. 

Those out there who have injured the ligaments at the side of the knee joint, the collateral ligaments, via sports like soccer or football, can attest to the long healing times I am referring to here. When we sprain a ligament, not only do we experience some pain and swelling, but the area also seems looser and more prone to re-injury. A ligament sprain that almost everyone has experienced at one time or another like this is the outer ankle.

It seems that one of the safest ways to stretch your tight muscles, and avoid stretching your supportive yet rigid ligaments, is via moderate intensity, slow, held stretches. Warmer muscles and ligaments seem to do this more healthily then cold ones, so I like to move slowly and mindfully in and out of a position a few times to warm up the tissues, and then follow that up with a more sustained hold. And the good news regarding safe stretching is that our nervous system warns us as we approach the kind of overstretch that could tear our ligaments (and tendons) through pain (which can have a whole range of variety and intensity), trembling or weakness. This is yet another reason to pay close attention to the sensations that arise as you perform your asanas. Also important is the location of the sensations, as those arising in the mid-length of the muscles is much more acceptable than sensations occurring right over joints. You might hang in there a bit longer in the first instance and come out of a stretch promptly in the latter!  

Next time, I’ll discuss tendons, which share some similarities with ligaments, but have some unique functions as well.