Why A Dexa Scan Can Help You With Your Exercise Goals}

Submitted by: Lisa Weis

Some of you will find this program either difficult (if you are a little bit taller) and others may find it easier? But why is that? Why do smaller limbed ladies squat better then taller ladies and relatively speaking the smaller ladies can lift more weight compared to women who maybe weigh the same.

There are physical analysis such as a bone mineral density test held at dexa scan Brisbane that can help you understand the reasons for these characteristics of that effect movement. It is well known that accelerating a deadlift bar (a large mass) requires a larger force than lifting something from inertia to movement that weighs lighter and at the same rate. But some of the more subtle scaling problems such as height, width problems are not so obvious.

Why is it that larger women can lift more weight, but cant jump as high as their smaller counterparts. How much strength is required to support or move a larger body? How much more strength do taller women have over smaller women and why do taller women find it harder to move something at a slower tempo then shorter women. Watching taller women squat is like watching a giraffe or a camel for that matter going from a standing position to a kneeling position. Its almost impossible but somehow they manage it.

If something is twice as big then it is 8 times as heavier. Because it is 2 times to the third power. Because there are 3 linear dimensions. Height, width and length. Take a small cat versus a dog that is twice as big the cat. Lets assume they have the same body shape (body proportions such as muscle mass which can be determined by a DEXA scan) but the dog is twice as big as the cat. So we use a simple formula of 2 to the power of 3 which equals 8. 2 x 2 x 2. Thus the dog has a weight 8 times that of the cat. Here comes the clever part. The cross-sectional area of the legs supporting the animal only depends on the 2nd power of the linear dimension. So now the dog has only four times (2×2) the leg area of the mouse. Thus the dog is supporting 8 times the weight on only 4 times the area, resulting not only the cat being able to jump more higher and nimbly, but the dog has double stress or pressure of the leg structure.

Now this double stress on the legs and in particular the knee and ankle joints are responsible for a lot of osteoarthritis in these joints and also is responsible for a lot of injuries and un-needed stress on joints. If you were flexible in bones and tissues this would add to the resilience and affords some protection from injury. Which leads into the next point nicely.

An important fact you should know is that there is a tissue in the body that can build bone efficiently and effectively and that is muscle. How much force can your muscles exert is roughly proportional to the cross-sectional area of the total packet of muscle fibres in that particular muscle group. this cross-sectional muscle can be easily determined by having a DEXA scan Brisbane. Now if you take our dog example – who has twice the size of legs compared to the cats, the muscles would have four times the cross-sectional area and will exert four times the force, using our simple formula of (2×2). So you think the dog could jump as much or the same as the cat. However, mass – the size of the animal or the weight of the animal comes now into play. The mass of the dog is 8 times as great the dog is definitely going to still have difficulty in its movements and must exert more muscular effort to accelerate or jump to the same level as the mouse.

But how do these scaling apply for different sized and different heights of women! We all have different starting and ending muscle strengths, depending on your background of training, or various sports played as a child, your age, health and of course other factors. However, as a human your body pretty much follows the next ladies biomechanical layout. This has allowed me to set a program using only 4 human basic movements, weve added a barbell, derived the principles of an Olympic weightlifters program which enables you to exert as much muscular strength with efficiency and as least effort as possible.

About the Author: Lisa Weis is an ex-Olympic Weightlifter at The Bone Clinic, and a member of the primary Brisbane based team. Australian-born and based in Brisbane, she has considerable experience of helping osteoporotic women to improve results by implementing effective exercise systems and creating processes to recognize, enhance better exercise therapies. She also helps the experts to use DEXA machine in effective way. To learn about the DEXA scanning, at the Bone Clinic , visit

theboneclinic.com.au/dexa-scan-brisbane/

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