The Impact of Three Different Forms of Warm Up on Performance

When it comes to high intensity training or competition, warmup routines should be chosen with performance as a primary concern. Different forms of warm up can potentially inhibit or improve performance aspects. The purpose of this study was to compare the acute effects of static stretching, dynamic stretching, and self-myofascial release via foam rolling (SMR) on knee and hip range of motion, peak power, rate of force development, and jump height. Twelve subjects (n=12) both male (n=6) and female (n=6) who were recreationally or competitively active at least 3 times a week for at least 6 months prior to testing were used. The subjects must have also had no major lower body orthopedic surgery in their lifetime either. Height, weight, age, and gender were all measured on the first day and a control test was done. Each subject sat for 10 minutes and then a goniometer was used to measure passive knee and hip range of motion. Afterwards a force plate platform squat jump was done, followed by a force plate platform isometric mid-thigh pull. Each subject was then placed in their next warmup protocol via a Latin squares format. The testing consisted of 10 minute protocols of dynamic warmup, static warmup, and SMR where the hips, hamstrings, quads, and gastrocnemius were all worked. All subjects performed each warmup on a day that was no sooner than 24 hours prior to their last test. Compared to the control hip range of motion increased significantly in the static (+3.2% P=.009), dynamic (+2.8% P=.018), and SMR (+4.1% P=.001) but there was no significant difference between the groups. Likewise, knee range of motion increased significantly in the static (+4.3% P=.001), dynamic (+3.0% P=.012), and SMR (+4.4% P\u3c.001) but there was no significant difference between the groups. Jump height and peak power were positively affected by dynamic (+3.1% P=0.011) and SMR (+2.2% P=.049), and static showed no change when compared to a control. There was no significant difference between the dynamic and the SMR protocols. The isometric mid-thigh pull showed no positive or negative correlations for rate of force development when compared between all groups. The current study suggests that all three forms of warmup equally improves passive hip and knee range of motion. This study also suggests that power performance could benefit from 10 minute dynamic and SMR protocols, while static warmups may not negatively affect them. However, 10 minute protocols of static warmup, dynamic warmup, and SMR may not positively or negatively affect rate of force development

A principal components approach to parent-to-newborn body composition associations in South India

Background: size at birth is influenced by environmental factors, like maternal nutrition and parity, and by genes. Birth weight is a composite measure, encompassing bone, fat and lean mass. These may have different determinants. The main purpose of this paper was to use anthropometry and principal components analysis (PCA) to describe maternal and newborn body composition, and associations between them, in an Indian population. We also compared maternal and paternal measurements (body mass index (BMI) and height) as predictors of newborn body composition.Methods: weight, height, head and mid-arm circumferences, skinfold thicknesses and external pelvic diameters were measured at 30 ± 2 weeks gestation in 571 pregnant women attending the antenatal clinic of the Holdsworth Memorial Hospital, Mysore, India. Paternal height and weight were also measured. At birth, detailed neonatal anthropometry was performed. Unrotated and varimax rotated PCA was applied to the maternal and neonatal measurements.Results: rotated PCA reduced maternal measurements to 4 independent components (fat, pelvis, height and muscle) and neonatal measurements to 3 components (trunk+head, fat, and leg length). An SD increase in maternal fat was associated with a 0.16 SD increase (?) in neonatal fat (p < 0.001, adjusted for gestation, maternal parity, newborn sex and socio-economic status). Maternal pelvis, height and (for male babies) muscle predicted neonatal trunk+head (? = 0. 09 SD; p = 0.017, ? = 0.12 SD; p = 0.006 and ? = 0.27 SD; p < 0.001). In the mother-baby and father-baby comparison, maternal BMI predicted neonatal fat (? = 0.20 SD; p < 0.001) and neonatal trunk+head (? = 0.15 SD; p = 0.001). Both maternal (? = 0.12 SD; p = 0.002) and paternal height (? = 0.09 SD; p = 0.030) predicted neonatal trunk+head but the associations became weak and statistically non-significant in multivariate analysis. Only paternal height predicted neonatal leg length (? = 0.15 SD; p = 0.003).Conclusion: principal components analysis is a useful method to describe neonatal body composition and its determinants. Newborn adiposity is related to maternal nutritional status and parity, while newborn length is genetically determined. Further research is needed to understand mechanisms linking maternal pelvic size to fetal growth and the determinants and implications of the components (trunk v leg length) of fetal skeletal growt

Deep prosthetic joint infection:A qualitative study of the impact on patients and their experiences of revision surgery

OBJECTIVES: Around 1% of patients who have a hip replacement have deep prosthetic joint infection (PJI) afterwards. PJI is often treated with antibiotics plus a single revision operation (1-stage revision), or antibiotics plus a 2-stage revision process involving more than 1 operation. This study aimed to characterise the impact and experience of PJI and treatment on patients, including comparison of 1-stage with 2-stage revision treatment. DESIGN: Qualitative semistructured interviews with patients who had undergone surgical revision treatment for PJI. Patients were interviewed between 2 weeks and 12 months postdischarge. Data were audio-recorded, transcribed, anonymised and analysed using a thematic approach, with 20% of transcripts double-coded. SETTING: Patients from 5 National Health Service (NHS) orthopaedic departments treating PJI in England and Wales were interviewed in their homes (n=18) or at hospital (n=1). PARTICIPANTS: 19 patients participated (12 men, 7 women, age range 56–88 years, mean age 73.2 years). RESULTS: Participants reported receiving between 1 and 15 revision operations after their primary joint replacement. Analysis indicated that participants made sense of their experience through reference to 3 key phases: the period of symptom onset, the treatment period and protracted recovery after treatment. By conceptualising their experience in this way, and through themes that emerged in these periods, they conveyed the ordeal that PJI represented. Finally, in light of the challenges of PJI, they described the need for support in all of these phases. 2-stage revision had greater impact on participants’ mobility, and further burdens associated with additional complications. CONCLUSIONS: Deep PJI impacted on all aspects of patients’ lives. 2-stage revision had greater impact than 1-stage revision on participants’ well-being because the time in between revision procedures meant long periods of immobility and related psychological distress. Participants expressed a need for more psychological and rehabilitative support during treatment and long-term recovery

A farm transmission model for Salmonella in pigs, applicable to EU members states

The burden of Salmonella entering pig slaughterhouses across the European Union (EU) is considered a primary food safety concern. In order to assist EU Member States with the development of National Control Plans, we have developed a farm transmission model applicable to all Member States. It is an individual-based stochastic Susceptible-Infected model, that takes into account four different sources of infection of pigs (sows, feed, external contaminants such as rodents and new stock) and various management practices linked to Salmonella transmission/protection (housing, flooring, feed, All-In-All-Out production). A novel development within the model is the assessment of dynamic shedding rates. The results of the model, parameterized for two case study Member States (one high and one low prevalence) suggest that breeding herd prevalence is a strong indicator of slaughter pig prevalence. Until a Member States’ breeding herd prevalence is brought below 10% then the sow will be the dominant source of infection to pigs raised for meat production; below this level of breeding herd prevalence, feed becomes the dominant force of infection

Update on Electricity Customer Choice In Ohio: Competition Continues to Outperform Traditional Monopoly Regulation (Executive Summary)

Key Findings at a Glance: Deregulated Markets Save Ohio Electricity Consumers Billions Since 2011, deregulation has saved Ohio consumers $23.9 billion. The Study Team anticipates that savings will continue for the near term to be around$3 billion per year. However, these savings may be lost, in whole or in part, if deregulated energy markets continue to be undermined by cross subsidies. Competition Outperforms Monopoly Regulation Competition has driven down average electricity prices in deregulated Midwestern states while their regulated peers have seen a steady increase in price of generated electricity

Incommensurate Transverse Anisotropy Induced by Disorder and Spin-Orbit-Vibron Coupling in Mn12-acetate

It has been shown within density-functional theory that in Mn$_{12}$-acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.Comment: Will be presented at MMM conference 200

Update on Electricity Customer Choice In Ohio: Competition Continues to Outperform Traditional Monopoly Regulation (Executive Summary)

Key Findings at a Glance: Deregulated Markets Save Ohio Electricity Consumers Billions Since 2011, deregulation has saved Ohio consumers $23.9 billion. The Study Team anticipates that savings will continue for the near term to be around$3 billion per year. However, these savings may be lost, in whole or in part, if deregulated energy markets continue to be undermined by cross subsidies. Competition Outperforms Monopoly Regulation Competition has driven down average electricity prices in deregulated Midwestern states while their regulated peers have seen a steady increase in price of generated electricity