The Influence of CrossFit Training on Running Mechanics

Introduction 40 million Americans run regularly.1 Contrary to many runner’s beliefs, increased strength may be beneficial while not adding body mass. An increase in strength in specific muscles may improve running gait and performance. 9,6 Strength training may also play an important role in preventing common overuse injuries in running 11,12 Depending on the style of strength training, it may also have an enhanced benefit on running economy.4,16 Participation in CrossFit is also widely popular, with an increase in participation of 923% in the past ten years.2 CrossFit is a type of strength training in which most movements performed utilize the hip to generate a majority of the power for successful completion.8 Muscles of the hip and knee are imperative during many CrossFit movements, but also during running. Purpose The purpose of this study is to investigate the influence that CrossFit training has on running mechanics. Methods 18 recreational runners between the ages of 18-65 were recruited in each of two groups: 9 runners that also participate in CrossFit 3 times per week, and 9 runners that do not do any strength training. Inclusion criteria included running at least 10 miles a week. Participants gave written consent and completed a demographic questionnaire and Physical Activity Readiness Questionnaire. Following consent, InBody (570, InBody USA, Cerritos, CA) bioelectric impedance body composition was collected. Participants then completed a 5-minute treadmill warm-up. Retro-reflective markers were placed bilaterally on the shoulders and hips and unilaterally on the leg and foot. Data collection was completed over ground along a 10-meter runway with three embedded force platforms (1000 Hz, AMTI Optima, Watertown, MA). Preferred running velocity was then determined. Participants performed two separate conditions; preferred running velocity (C1) and a set velocity of 3.5 m/s (C2). Trials were collected via three-dimensional motion capture system (200 Hz, Vicon, MX and Vantage, Oxfordshire, UK) and photoelectric timing gates. Eight successful trials were collected for each condition. Participants then performed strength testing of the hip and knee to determine peak torque using the isokinetic dynamometer (Biodex System 3, Biodex Medical Systems Shirley, NY) each consisting of one set of five reps at 120 °/s . Data Analysis Following collection, trials were individually processed using Vicon Nexus software (version 2.2.3, Oxfrodshire, UK). Trials were then exported to Visual 3D (version 5, Germantown, MD) and further processed. Statistics Kinematic and kinetic variables were analyzed with a 2x2 repeated measures ANOVA. Strength variables were analyzed with independent t-tests. Alpha level was set to 0.05. Results There was a significant difference between the CF group and the RO group in all of the strength measures, with the CF group having greater strength. For hip ROM, there were no significant differences between the groups, but there was a significant difference between the conditions. Discussion Although there were few differences between the two groups, the main finding of this study is that the CrossFit group was significantly stronger than the run-only group. This is of importance because it demonstrates that even though the CrossFit group was stronger, the running mechanics of the two groups were similar

Troika of Fortune Tellers

This film is an oral history about the intergenerational relationship between three women: my grandmother, my mother, and I. Through our connection I explore the Russian traditions that my grandmother has cultivated and shared among the three of us, in particular, the tradition of fortune telling. I also explore my grandmother\u27s struggle with dementia. Although her memory is fading, she can still remember the practice of reading fortunes and that tradition has preserved our bond and her legacy

Who Am I?: How Natives’ Mental Trauma Develop During Precolonial and Colonial Eras as Seen in Achebe’s Things Fall Apart and Fanon’s The Wretched of the Earth

Colonialism is a long, brutal process, where natives’ identities are uprooted as colonizers establish their influence in a foreign land. Consequently, through the exploration of the natives’ response to this upheaval throughout the precolonial and colonial eras, the psychological toll that is placed on the colonized is evident. Such mental trauma that is incited is explored in Chinua Achebe’s fictional novel Things Fall Apart, which unveils the slowly lost of the natives’ identities during the precolonial shift, and the non-fiction work of Frantz Fanon, The Wretched of the Earth that details psychological disorders of the colonized due to colonization. This essay will explore how the stripping of natives’ autonomy and their sense of self results in the detrimental traumas illustrated within these critically acclaimed texts

The Artistry of Mediation: A Look at Mediation’s Effectiveness for Resolving Cross-Cultural Disputes Through the Leonardo da Vinci Conflict Between France’s Louvre Museum and Italy’s Uffizi Gallery

Art is powerful, as it symbolizes the history and identity of the country that claims it. However, through timely transitions, such as trade and wars, the ownership of meaningful artworks blurs, with museums fighting to claim their heritage to put on honorable display for their people. Mediation can be a peaceful means to resolve art ownership disputes, as it accounts for respecting the individual cultures of the countries represented in the dispute. Using the key medication traits described within this essay, a prepared mediator involved in such a cross-cultural conflict should be able to help resolve the issue at hand. The following tests this claim by analyzing a fictional analysis of a real dispute between France’s Louvre Museum and Italy’s Uffizi Gallery over a loan of artworks by Leonardo da Vinci

Quantised orbital angular momentum transfer and magnetic dichroism in the interaction of electron vortices with matter

Following the very recent experimental realisation of electron vortices, we consider their interaction with matter, in particular the transfer of orbital angular momentum in the context of electron energy loss spectroscopy, and the recently observed dichroism in thin film magnetised iron samples. We show here that orbital angular momentum exchange does indeed occur between electron vortices and the internal electronic-type motion, as well as center of mass motion of atoms in the electric dipole approximation. This contrasts with the case of optical vortices where such transfer only occurs in transitions involving multipoles higher than the dipole. The physical basis of the observed dichroism is explained

DNA Methylation Analysis Validates Organoids as a Viable Model for Studying Human Intestinal Aging.

Background & aimsThe epithelia of the intestine and colon turn over rapidly and are maintained by adult stem cells at the base of crypts. Although the small intestine and colon have distinct, well-characterized physiological functions, it remains unclear if there are fundamental regional differences in stem cell behavior or region-dependent degenerative changes during aging. Mesenchyme-free organoids provide useful tools for investigating intestinal stem cell biology in vitro and have started to be used for investigating age-related changes in stem cell function. However, it is unknown whether organoids maintain hallmarks of age in the absence of an aging niche. We tested whether stem cell-enriched organoids preserved the DNA methylation-based aging profiles associated with the tissues and crypts from which they were derived.MethodsTo address this, we used standard human methylation arrays and the human epigenetic clock as a biomarker of age to analyze in vitro-derived, 3-dimensional, stem cell-enriched intestinal organoids.ResultsWe found that human stem cell-enriched organoids maintained segmental differences in methylation patterns and that age, as measured by the epigenetic clock, also was maintained in vitro. Surprisingly, we found that stem cell-enriched organoids derived from the small intestine showed striking epigenetic age reduction relative to organoids derived from colon.ConclusionsOur data validate the use of organoids as a model for studying human intestinal aging and introduce methods that can be used when modeling aging or age-onset diseases in vitro

Neurologic Changes and Depression

This article covers current research on the relationship between depression and cognitive impairment in older adults. First, it approaches the clinical assessment of late-life depression and comorbid cognitive impairment. Cognitive risk factors for suicide are discussed. Research is then provided on neuropsychological changes associated with depression, discussing subjective cognitive impairment, mild cognitive impairment, and dementia profiles. Additionally, literature regarding neuroimaging and biomarker findings in depressed older adults is presented. Finally, therapeutic models for treatment of late-life depression are also discussed, including psychotherapy models, holistic treatments, pharmacologic approaches, and brain-stimulation therapies

Economic burden of diabetes mellitus and its socio-economic impact on household expenditure in an urban slum area

Background: India is on the brink of an epidemic of diabetes mellitus (DM). In the near future, DM will pose a severe burden on the already fragile and under-resourced health care system in India.Methods: A prospective community based cohort study was taken up for assessing the financial burden on households of patients with DM in an urban slum of Mumbai to reflect the economic implications of DM.Results: The mean age of participants was 51 years. Forty (33.33%) out of 120 were suffering from diabetes for more than 5 years and it was proved statistically that the total cost of expenditure on treatment per month was significantly related to the duration of DM. On an average the monthly direct expenditure was INR 687.5 per patient and indirect expenditure was INR 348.75 per patient. Catastrophic expenditure was borne by 5.8% of the participants.Conclusions: Direct cost forms the major component of the total cost of DM management. The expenditure on the management of Diabetes increases with the duration of the illness. As the out-of-pocket expenditure is the mainstay of financing the cost of diabetes mellitus in India, there is a possibility of these households of DM patients might be pushed into the poverty trap. It is recommended that the Government facilities for management of DM should be strengthened and quality of services should be improved in the interest of diabetic patients. Public awareness campaigns about the economic implications of DM and services provided by the government should be carried out

Entrapment: an important mechanism to explain the shortwave 3D radiative effect of clouds

Several mechanisms have previously been proposed to explain differences between the shortwave reflectance of realistic cloud scenes computed using the 1D independent column approximation (ICA) and 3D solutions of the radiative transfer equation. When the sun is low in the sky, interception of sunlight by cloud sides tends to increase reflectance relative to ICA estimates that neglect this effect. When the sun is high, 3D radiative transfer tends to make clouds less reflective, which we argue is explained by the mechanism of “entrapment” whereby horizontal transport of radiation beneath a cloud layer increases the chances, relative to the ICA, of light being absorbed by cloud or the surface. It is especially important for multilayered cloud scenes. We describe modifications to the previously described Speedy Algorithm for Radiative Transfer through Cloud Sides (SPARTACUS) to represent different entrapment assumptions, and test their impact on 65 contrasting scenes from a cloud-resolving model. When entrapment is represented explicitly via a calculation of the mean horizontal distance traveled by reflected light, SPARTACUS predicts a mean “3D radiative effect” (the difference in top-of-atmosphere irradiances between 3D and ICA calculations) of 8.1 W m−2 for overhead sun. This is within 2% of broadband Monte Carlo calculations on the same scenes. The importance of entrapment is highlighted by the finding that the extreme assumptions in SPARTACUS of “zero entrapment” and “maximum entrapment” lead to corresponding mean 3D radiative effects of 1.7 and 19.6 W m−2, respectively