Publications by authors named "Nikolaidis P"

Background: Several single race events (5 km, 10 km, half-marathon, marathon, ultra-marathon) in different countries and different years have been analyzed in multiple studies, representing the rising interest in endurance-based activity and thus physical health. With focus on participation numbers, performance or sex difference, many single study results were obtained. The running trends in a whole country covering a longer period of time and several race distances are missing so far.

View Article and Find Full Text PDF

It is well known that elite athletes of specific ethnicities and/or nationalities dominate certain sports disciplines (e.g., East Africans in marathon running).

View Article and Find Full Text PDF
Article Synopsis
  • The article "Performance improvement in sport through vitamin D" was retracted due to plagiarism concerns.
  • The plagiarism issue arose from similarities in paraphrasing with another article, despite proper citation.
  • The authors could not satisfactorily explain these concerns, leading to the decision for retraction by the Editor in Chief.
View Article and Find Full Text PDF

We aimed to analyze sex differences in time-limited ultramarathon participation, while also identifying trends in participation, age, and performance across different formats of events, from 1990 to 2020. This is an exploratory study, using data obtained from the official event web pages. We downloaded information regarding the year of the event, athletes' year of birth, sex, race event, ranking, and mean running speed (km/h).

View Article and Find Full Text PDF

Objective: Ultra-marathon running races are held as distance-limited or time-limited events, ranging from 6 h to 10 days. Only a few runners compete in 10-day events, and so far, we have little knowledge about the athletes' origins, performance, and event characteristics. The aim of the present study was to investigate the origin and performance of these runners and the fastest race locations.

View Article and Find Full Text PDF

Background: The IRONMAN® (IM) triathlon is a popular multi-sport, where age group athletes often strive to qualify for the IM World Championship in Hawaii. The aim of the present study was to investigate the location of the fastest IM racecourses for age group IM triathletes. This knowledge will help IM age group triathletes find the best racecourse, considering their strengths and weaknesses, to qualify.

View Article and Find Full Text PDF
Article Synopsis
  • Ultramarathon running, especially 24-hour races, is becoming increasingly popular, yet there's limited knowledge about the origins of top runners and their fastest race locations.
  • A study utilizing a machine learning model analyzed over 171,000 race records and found that the majority of athletes come from the USA and Europe, with Tunisians showing the fastest average speeds.
  • The study revealed a strong connection between an athlete's country of origin and the race location, with the fastest races occurring in Israel, Romania, and other European and Asian countries; men generally ran faster than women, particularly in age groups 35-49.
View Article and Find Full Text PDF
Article Synopsis
  • * This review compares the effectiveness of several dietary supplements, including red yeast rice, flaxseed, artichokes, and bergamot, against statins, based on studies published from 2012 to 2024.
  • * Findings indicate that supplements can lower cholesterol, but further research is needed to confirm their efficacy and quality, particularly for red yeast rice, bergamot, and flaxseed.
View Article and Find Full Text PDF

Extensive research has delved into the impact of environmental circumstances on the pacing and performance of professional marathon runners. However, the effects of environmental conditions on the pacing strategies employed by marathon participants in general remain relatively unexplored. This study aimed to examine the potential associations between various environmental factors, encompassing temperature, barometric pressure, humidity, precipitation, sunshine, cloud cover, wind speed, and dew point, and the pacing behavior of men and women.

View Article and Find Full Text PDF

Background: The sex difference in athletic performance has been thoroughly investigated in single sport disciplines such as swimming, cycling, and running. In contrast, only small samples of long-distance triathlons, such as the IRONMAN® triathlon, have been investigated so far.

Aim: The aim of the study was to examine potential sex differences in the three split disciplines by age groups in 5-year intervals in a very large data set of IRONMAN® age group triathletes.

View Article and Find Full Text PDF

Background: Triathletes are pushing their limits in multi-stage Ironman-distance triathlons. In the present case study, we investigated the pacing during 20, 40, and 60 Ironman-distance triathlons in 20, 40, and 60 days, respectively, of one professional IRONMAN® triathlete.

Case Study: Event 1 (20 Ironman-distance triathlons in 20 days), Event 2 (40 Ironman-distance triathlons in 40 days), and Event 3 (60 Ironman-distance triathlons in 60 days) were analyzed by discipline (swimming, cycling, running, and overall event time), by Deca intervals (10 days of consecutive Ironman-distance triathlons) and additional data (sleep duration, body mass, heart rate in cycling and running).

View Article and Find Full Text PDF

Unlabelled: Variable resistance training has been widely used in athletic preparation.

Objectives: To analyze the use of currents (VRT) and the traditional method (TRAD) on speed, power and temperature in a training session.

Methods: Fourteen paralympic powerlifting (PP) athletes took part over three weeks.

View Article and Find Full Text PDF

The majority of participants in Ironman triathlon races are age group athletes. We have extensive knowledge about recreational athletes' training and competition participation. Nonetheless, Ironman age group triathletes must achieve fast race times to qualify for the Ironman World Championship in Hawaii.

View Article and Find Full Text PDF

Caffeine and sodium bicarbonate are extensively researched ergogenic aids known for their potential to enhance exercise performance. The stimulant properties of caffeine on the central nervous system, coupled with the buffering capacity of sodium bicarbonate, have been associated with improved athletic performance. This has led to investigations of their combined effects on strength.

View Article and Find Full Text PDF

The present study intended to determine the nationality of the fastest 100-mile ultra-marathoners and the country/events where the fastest 100-mile races are held. A machine learning model based on the XG Boost algorithm was built to predict the running speed from the athlete's age (Age group), gender (Gender), country of origin (Athlete country) and where the race occurred (Event country). Model explainability tools were then used to investigate how each independent variable influenced the predicted running speed.

View Article and Find Full Text PDF

Backstroke has been thoroughly investigated in the context of sports science. However, we have no knowledge about the nationalities of the fastest age group backstroke swimmers. Therefore, the present study intended to investigate the nationalities of the fastest backstroke swimmers.

View Article and Find Full Text PDF
Article Synopsis
  • Diagnosing biliary system conditions is challenging due to anatomic variations and the dynamic nature of the biliary tract, which can complicate identification of normal versus abnormal findings.
  • Choledochal cysts are important to diagnose due to their potential risk for developing into cholangiocarcinoma; while choledocholithiasis (bile duct stones) is the most common cause of biliary dilation, MRI is the most sensitive imaging method for detection.
  • Understanding different types of biliary malignancies, including intraductal papillary biliary neoplasms and cholangiocarcinoma, is essential for correct staging and treatment options, as well as differentiating between various inflammatory conditions affecting the biliary tree.
View Article and Find Full Text PDF
ACR Appropriateness Criteria® Sepsis.

J Am Coll Radiol

June 2024

Sepsis is defined as a life-threatening organ dysfunction caused by a dysregulated host response to infection. A search for the underlying cause of infection typically includes radiological imaging as part of this investigation. This document focuses on thoracic and abdominopelvic causes of sepsis.

View Article and Find Full Text PDF

Initial imaging evaluation of hydronephrosis of unknown etiology is a complex subject and is dependent on clinical context. In asymptomatic patients, it is often best conducted via CT urography (CTU) without and with contrast, MR urography (MRU) without and with contrast, or scintigraphic evaluation with mercaptoacetyltriglycine (MAG3) imaging. For symptomatic patients, CTU without and with contrast, MRU without and with contrast, MAG3 scintigraphy, or ultrasound of the kidneys and bladder with Doppler imaging are all viable initial imaging studies.

View Article and Find Full Text PDF

Participation in marathons has dramatically increased over the last few years. Marathon running has many proven beneficial effects, especially on cardiovascular health and fitness. Most research has focused on physiologic and pathophysiologic adaptations in connection with endurance exercise.

View Article and Find Full Text PDF

Introduction: Many COVID-19 patients display adverse symptoms, such as reduced physical ability, poor quality of life, and impaired pulmonary function. Therefore, this systematic review is aimed at evaluating the effectiveness of physical exercise on various psychophysiological indicators among COVID-19 patients who may be at any stage of their illness (i.e.

View Article and Find Full Text PDF

Background: Ultra-endurance events are gaining popularity in multiple exercise disciplines, including cycling. With increasing numbers of ultra-cycling events, aspects influencing participation and performance are of interest to the cycling community.

Main Body: The aim of this narrative review was, therefore, to assess the types of races offered, the characteristics of the cyclists, the fluid and energy balance during the race, the body mass changes after the race, and the parameters that may enhance performance based on existing literature.

View Article and Find Full Text PDF