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Most Accurate Body Fat Tracker? HUME vs. DEXA Scan
Episode 99 β€’ 10th October 2025 β€’ Mobilize And Energize β€’ Dr. Tammy Penhollow
00:00:00 00:11:22

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Think your bathroom scale tells you everything you need to know about your health? Think again.

In this episode, we dive into the surprising truth behind traditional fitness tracking and reveal the next-gen tech that's changing the game. From wearables to advanced body composition tools, discover why tracking fat, muscle, and hydration could be the secret to living stronger, longer.

Ready to find out what your scale isn’t telling you? Hit play now and unlock the data that actually matters.

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Transcripts

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Most people think stepping on the bathroom scale tells them

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the truth about their health, but it doesn't. Weight alone

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can't tell you if you're gaining muscle, losing fat or staying

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the same. That's where fitness trackers come in. Wearables

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track steps, heart rate and sleep, but what about your

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actual body composition? I'm Dr Tammy Penhollow, a spine and

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joint care specialist at Precision Regenerative Medicine.

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Today, I'm breaking down the HUME Body Pod, a next generation

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tracker that combines scale and handle inputs for deeper

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insights. We'll compare it to wearables and in-office tools

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like InBody, talk about pitfalls, and show you how

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tracking can actually extend your health span.

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So I know we've all grown up with whole issue of you make

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sure you get up in the morning, you go to the bathroom, you

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dress down before the shower, and you hop on the scale before

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you've eaten, and that consistency same time of day,

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maybe once a week, every Monday. Whatever is the issue. But

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unfortunately, that is just a number. The scale is just a

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number. It's not enough to track your weight alone. It only shows

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mass. It does not show body composition. But body

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composition itself is a predictor of health span. For

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example, a higher lean muscle mass is linked to longer life

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span and lower disability risk. When we lose muscle, sarcopenia,

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that is a predictor of frailty and falls. When you fall, you

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break things like your bones, like your humerus, like your

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femur, like your hip, and that can start a whole cascade of

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ugliness. Remember, we've talked about grip strength, we've

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talked about sit to stand studies, and the whole issue

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with building muscle, maintaining muscle is critical.

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So let's break it down. What kind of trackers do we have

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available? Well, there's your regular old bathroom scale. It

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gives weight, it doesn't break it down into what kind of

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weight, like the bones, the muscles, the water, the fat. It

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can actually be pretty darn misleading if you might gain

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muscle but lose fat, the number may go up, and that may make you

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think, "Oh my gosh, I'm actually gaining weight. What am I doing

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wrong?" Not so when you do other forms of more accurate

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wearables. Watches, we've got the Garmin, we've got the Apple,

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we've got the Fitbit. All these things can track things like

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heart rate, like heart rate variability, like sleep. It

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doesn't measure the muscle or the fat directly. So these can

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be nice adjuncts. And some of these scales have little things

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like the HUME Strap can go with the HUME scale, and that can

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have them all in one platform. Otherwise, if you have something

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like an Apple Watch, and you do the Apple Fit Tracker, your Hume

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and your Apple Watch can combine, and you can have the

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best of all those worlds. But again, these trackers don't talk

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about your body composition. Then there are more office based

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systems. You may have heard of InBody you may have heard of

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DEXA. DEXA has been known as the gold standard in accuracy, and

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you need to find the right kind of DEXA. So the DEXA that I

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requested, I went to a major imaging facility, and I

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specifically paid out of pocket for body composition, hoping

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that I get truncal fat, trungcal muscle, each arm and leg muscle,

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all these different things break it down into water, into fat,

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into muscle. It didn't do it. It was, you are this many pounds of

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muscle, this many pounds of fat, period. Wanted more information

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than that, and thought I was going to get more information

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than that. So actually got my money back. So DEXA is

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supposedly the gold standard. When you have stand on the

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InBody, which many offices have, that is 99% as accurate as DEXA.

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So that's not bad. However, they are very costly for an office to

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have. They're very costly, often they'll charge their members,

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either it's within their concierge fee or per time to get

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on that scale. And you can't just hop on it every day in your

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own home.

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Then we can talk about the HUME Body Pod, which is a hybrid home

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tool, but you can also use it for the office. It is as

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accurate as the office based scales. Well, it's 98% of DEXA

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versus the InBody is 99% of DEXA. That's not bad, as long as

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we have something consistent. As long as we have you're comparing

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your Apple to your Apple. You're on the same scale. You're on

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that same InBody, etc. So that is really nice. It combines a

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scale plus bioelectrical impediment, impedance with the

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handles that you hold on to. You contract muscle mass, fat,

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percentage hydration, segmental analysis, the left arm, the

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right arm, the left and right legs, the trunc in terms of

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pounds of muscle and pounds of fat in each. And it also gives

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you an overall score. It says whether you are ultra low, low,

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normal, high or super high with regard to the percentage body

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fat or muscle and all these things. It's over 40 parameters.

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And what I love about it is it can bridge that gap between the

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daily convenience, you can hop on your scale, you can hold the

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handles, versus the every X number of months that you go

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into the office, or the however many times a year that you go in

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for a DEXA scan. Let's say, why do we even want to track this

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stuff? I mean, you're overwhelmed by all these numbers

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anyway. What? What? What am I going to do with all this

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information? For example, what goes to your phone, and you can

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track it on an app, and you can just kind of see how things are

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going. You can recognize that when you're during your

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menstrual cycle, for example, you know that you have retained

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water, and that's going to change the numbers, but you know

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that it's that time of the month, and you can expect that,

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or you can recognize, "Ooh, I just ate a really salty, heavy

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carb meal. That's why I'm seeing these reflections on this." That

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is not only showing that the pounds changed on the scale, but

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the water composition and the mineral composition changed. So

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it's a little bit more information.

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What are the implications for health span and lifespan when we

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do these trackings? Why? Why would he even want to take this

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extra step. Muscle? Think of it as metabolic currency. Think of

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it as really your body's money. You can link lean mass to

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insulin sensitivity, link lean mass to bone health and to

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mobility, and when we track we tend to change our behavior.

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That's just the psychology of humans. People using trackers

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have increased adherence to exercise programs. Meta analysis

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data shows by 30% to 40%. That's big when we can make small

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changes that motivate us. And know, I'm going to be watching

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this every morning and it tells me how my sleep has been. I'm

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going to be stepping on this scale every morning and seeing

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what the parameters are based on my activities of the weekend or

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of the day before. It helps. And this is all over time. We want

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to detect a trend. Remember one little blip on the radar that's

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way up here, that's an outlier, that's a data point that is not

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really important, but a trend over time. Consistency tracking

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helps identify subtle changes. For example, I've had this

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shoulder surgery. I can see that the right arm muscle mass is

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different than the left arm muscle mass. It just shows it,

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and I can track that over time as I'm in physical therapy and

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start rebuilding this muscle. This muscle mass on this side is

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above average. This one is below average. This one's fat

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composition is average. This is below average because there's

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more muscle, I've lost muscle, and therefore the fat percentage

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is more in that average. I'd rather they be equal. And that's

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my goal. And that's what helps me with time and trend, get back

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to where I was prior to the surgery.

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So what are some pitfalls, right? We want to know timing

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matters. You want to get on this scale at the same time of day,

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ideally in the morning, after you go to the bathroom and

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before you eat? Minimal for the same clothing, for accuracy,

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you're not going to be in your super heavy jammies for one

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morning and you're in a tank top and underwear for the other

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morning. Do the same thing. Hydration. These readings vary

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tremendously with fluid status, so you can track that, and it'll

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tell you that you're 61% hydrated, or 58% hydrated, or

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whatever that is. And you can just think back to the day

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before, did I really pound the fluids like I was supposed to.

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Remember these numbers are just a tool. They're not the final

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truth. They're not a diagnosis. So how to incorporate a tracker?

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You can use at home. You can use things like your fitness

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trackers that are wearables. You can use this scale with the

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impedance. Motivational tool, frequent monitoring, you can go

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into the office for that in body or the DEXA, get a baseline,

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maybe get a deep analysis every three to six months, knowing

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that the cost is going to potentially be a recurring cost

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versus a one time cost. The wearables fill in that activity

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side, they fill in that sleep side of the picture, and all

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together, these create a 360 degree view of health and

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performance. So again, pair data with fitness and nutrition

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programs. Share data with your clinicians for deeper insight,

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use trends, not single numbers, to make the decisions and

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measure at the same time under the same baseline conditions.

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Tracking tools are not about obsession. They are about

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precision in your health journey. HUME offers a bridge

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between that daily convenience and the clinical insight, and at

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98% accuracy compared to DEXA, I think it's worth it. So if

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you're serious about building strength, aging well, and

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avoiding the pitfalls of weight only tracking this human body

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pod might be your next tool.

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If you like what you've seen, please hit like, subscribe and

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share this video with somebody who you might think needs it.

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Thank you.

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If you have knee pain and would like to learn more, I have a

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worksheet called Five Things to Do Now to Reduce Your Knee Pain

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Within a Week. Go to www.kneeboostnow.com to download

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it for FREE. I'd love to hear from you, so please like,

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subscribe and comment below so I can help you get out of your

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knee pain.

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professional health care services, including the giving

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of medical advice. No doctor-patient relationship is

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formed. Use of this information and the materials linked to this

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media is at the user's own risk. The content on the media is not

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intended to be a substitute for professional medical advice,

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diagnosis or treatment. Users should not disregard nor delay

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in obtaining medical advice from any medical condition they have,

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and they should seek the assistance of their health care

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professionals for any such conditions.

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