Author Archives: ljj126

Biomechanics of Crossfit tire flipping

Flipping a tire doesn’t seem like it would be all that fun, let alone do it as a work out, but it is one of the most beneficial workouts you will ever perform. For those of you who have never heard of this work out, it’s pretty simple, take a tire 3 times your weight or heavier and while keeping proper body form flip it over onto the other side, as demonstrated in the pic below! Then you simply repeat this exercise until you fatigue or your complete the given exercise.


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Some Studies show that crossfit workouts are the best workout to burn calories and gain muscle. Conducted in 2010, a tire flipping study suggested that this work out provides a high level of metabolic output as well as physical and mental stressors. All of which are good for the body. Other similar studies shared common theories about the bodies physical output while performing tire flipping. But how does it really work? What makes it so much better than workout?

The National body building association gave some insight as to why this workout is so great. You simply work more muscles at the same time, all while using cardiovascular output.


chart of main muscles used

Studies show the science behind how the workout affects the caloric output. The mathematics behind the flip can be somewhat complicated, but the math has also proven that the body uses more energy flipping than several other workouts. The math takes into account several factors like angles, weights and energy but the results are clear, tire flipping uses more energy in a shorter amount of time. According to Harvard medical school, the average person only burns about 90 calories an hour. The graph below, you can see there are drastic differences between regular strength training and Crossfit workouts.



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Another research study found that though crossfit is beneficial, there are dangers associated with the new fitness craze. If not properly done, you could suffer from pulled or sprained joints and ligaments, you could also have cardiovascular related issues if you are not properly trained or overwork your heart. This study focused on people who had already been working out with crossfit so the results only pertain to a fitter population. The hypothesis provided solid evidence to suggest that this crossfit workout burns more calories, but the samples were smaller and not representative of the over population. The study did not mention any confounding variables like level of fitness of the participant, but it did note that it wouldn’t be ideal for a 45 year old attempting it without proper help from a trained fitness coach or trainer. The study may also suffer from the Texas sharp shooter problem since the participants were already prone to be in better shape, there for able to perform the exercise better than someone who had never done crossfit. So more research needs to be done as well as prior research being duplicated.


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The take home message, tire flipping and other crossfit workouts simply give you the best bang for your buck when it comes to getting into shape, though the science gives you multiple examples how it works in your favor, there is a chance that these workouts might not be the right one for you. More research on how crossfit effects the body needs to be done since there aren’t that many studies on this new workout. Though the correlations and hypothesis seem to be correct, more research couldn’t hurt. In the mean time, why not change up your regular gym routine and give it a shot!

Kayaking for better mobility.

The leasiure activity of kayaking is a largely  growing sport and has only increased over the past decade. Not only is the sport super fun, it is a great work out as well. No matter the body of water you choose to paddle, there is no doubt that you can enjoy the sport or pastime at any age, and fitness level. That being said, how is it that someone with no kayaking or fitness experience could benefit from kayaking?



In further investigating a recent research study supported the general idea that kayaking could improve body mobility and was slightly more  beneficial than so regular exercise. The study was conducted on very specific patients, that being they all suffered from parkinsons disease. The study was a single blind, quasi experiment. It study took place at the Institute of Physical Medicine & Rehabilitation. The patients age ranged from 35-65 had as well as ranging from stage 1-3 Parkinson’s disease. The participants were ask to perform a set of tests in the water, and this went on for a 4 week time period, similar to physical therapy. The main factor measured was ROA or range of motion in the axial spinal cord.

Study Limitation and hypothesis were both an issue since the conductor of the therapy had knowledge about the study, possibly skuing the data results. There is also the variable that participants are on different medications, which could account for mobility range. In other words, better drugs can cause better range of motion. Finally severity of mobility could effect their results, as well as stage of disease. Needless to say the hypothesis was supported by the findings.


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The journal of sports medicine found similar results when testing for overall fitness levels associated with kayaking. Though the study focused on overall metabolic intake, the participants tested had similar tasks they needed to perform in order to get the results they were studying. Unfortunately this was not replicating the Parkinson’s study so the results were not 100% conclusive. Another study featured in the Huffington post has similar correlations as well, but that does not mean that it is directly causal. Since these studies all shared common theories, the evidence could suggest that kayaking is a better work out for you than the common typical therapy but it could be due to chance.

The Results could have been false positive, there’s that 5% chance that might not have been accounted for, even if the study was done well. The conclusion states that though the results were correlating with the hypothesis, that further research would be required to confirm any findings.



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So given that, the findings represent that something is infact going on physically that could impact the body in a more beneficial way than the typical therapy, but there is still more research that needs done to confirm accurate findings. In the mean time,


Study suggests college students are creeps!


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According to a study from Huffington post 90% of people like to creep, especially on their ex! The articles main focus was on a study that had been conducted by a grad student from Western Ontario thesis. The 50 question survey was distributed to 107 people ages 18-35, notably 74% of the participants were college students. The study only required have a breakup within the past 12 months. The Study pointed out several statistic making claims, like posting pictures specially to make their ex jealous, and even attempts to look up ex’s new or current partner. Although this study most likely has a lot of factual claims to it, without conclusive evidence, its hard to say if these stats are accurate.

Assuming the study was well conducted, it would be presumed that participants had been controlled, 3rd confounding variable were accounted for and there was no chance in revers causation. Sadly, the survey questions were not disclosed publically. However in researching other creeping study’s, the results weren’t to far off from the small study from the post. This study found that there were physical reactions associated with particular social media outlets, on specific images and on those sights had a psychological affect on the brain. The findings from the study supported the hypothesis, in other words, creeping lead to a positive state of mind experience.


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Another study suggests that the main reason people creep is very clear, it is for relationship status and uncertainty. Not to mention that the action itself is highly addictive.

Needless to say, though these studies show that body chemistry is the key component, there are many variables that are hard to account for as to why people love to creep. The studys suggest controlled samples and appear to be well conducted, but probability and chance are things that are harder to account for. For college students, it wouldn’t be a surprise as to why they have the highest rates of creeping. A simple fact for that would be social media having a great impact on your social well being, most students are accustom to working the internet in their favor versus someone in there 60’s. So although students are the number one creepers, the variables seem that they would sku the date if samples are collected for and controlled. So creep on creepers.


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Do you really need to drink water?


The best thing to ask someone who has a headache is, How much water have you had today? It seems almost pointless to ask but studies have shown that many common cures to minor body issues are water related.

A recent longitudinal study ranging from 2009 through 2012, featuring participants from the age of 18 to 64 were followed over the 4 year period, the particpants were then weighed and had the BMI measured. The study used urine analysis as well to determine other water ingestion. The results suggested that participants that had drank more water had lower BMI’s. Notably this study is has many correlations to other studies that find similar results. Variables however might not have been measured as well with these studies but the longitudinal study proved to have a national representative sample. Along with adequate samples, the study was conducted well by using controlled groups and 3rd party variables had been accounted for. There is a possibility that the results had been due to chance, that being only because no other study had been conducted in such detail.

Another informative study that references the journal biological chemistry, claims that the human body is 60%, and in order to control and account for proper functioning, the adult body must consume roughly 2.2-3 liters of water daily. It is mentioned that water consumption is not only consumed by liquid but it is done in food as well. Without adequate water consumption the body can’t regulate body temperature, flush body waste, or even aid in proper digestion, which could lead to major health hazards.


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Finally, all three the studies reported that water consumption is vital to your health and is responsible for maintaining a properly function body. In all studies, participants were properly measured and controlled, and though there is always chance in any aspect of science, the correlation between a healthy body and an unhealthy body could be as easy as filling up your cup. Water obviously can’t account for all health issues of people but for proper function, water alone plays a key role in staying alive.


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