Artemii Lazarev

Sinai Health System · Internal Medicine

“Testosterone boosters” (TB)—are supplements that are claimed to increase testosterone levels in the human body. While the consumption of TB may be popular among athletes, there is insufficient evidence both about the safety and the real efficacy of TB. In our review, we searched MEDLINE/PubMed and Cochrane Library for studies on the effects of 15...

Context: Our goal was to review the current literature regarding the ability of substances that have recently been included in the WADA prohibited list (i.e., meldonium, trimetazidine, xenon, and cobalt) or in the monitoring program (i.e., ecdysterone and bemethyl) to enhance performance in athletes or cause adverse effects. Evidence Acquisition: T...

Bezuglov, E, Shvets, E, Lyubushkina, A, Lazarev, A, Valova, Y, Zholinsky, A, and Waśkiewicz, Z. Relative age effect in Russian elite hockey. J Strength Cond Res XX(X): 000-000, 2020-A considerable amount of literature has been published on relative age effect (RAE) in many sports; however, only a few studies have investigated this phenomenon in Eur...

Study Design. Cross-sectional study Objective. The aim of this study was to evaluate the actual prevalence of degenerative spinal changes and their association with age in a cohort of professional soccer players. Summary of Background Data. Presently, there are data that athletes have more degenerative changes than non-athletes, however the r...

Background Professional soccer players are often evaluated with asymptomatic lesions of the ankle and foot, and such abnormalities may eventually become clinically relevant. Purpose To ascertain the prevalence of foot and ankle abnormalities in elite professional adult soccer players. Study Design Case series; Level of evidence, 4. Methods Profe...

Background: Evaluating anti-doping measures is essential to optimise their effectiveness. Comparing sporting results that have a higher doping prevalence, such as weightlifting, before and after the implementation of anti-doping measures may serve as an effectiveness indicator. Methods: The results of the most successful weightlifters of both sexes...

Purpose: To correlate the relationship between skeletal and chronological age in soccer players from elite and sub-elite youth soccer academies and to assess any differences between competition standards before the growth spurt. Methods and Study Design: This cross-sectional study involved 51 elite (age 139 6 5.8 months, height 152.2 6 12.8 cm, wei...

Purpose: to evaluate the incidence of intravenous therapy and to identify the most commonly used pharmacological substances among elite European endurance athletes. Methods and Study Design: This cross-sectional study included 153 elite track and field athletes (age 22.7 6 4.6, 94 males, 59 females), who completed an anonymous survey created on Goo...

Pediatric obesity is a global concern with distressing comorbid conditions, including mood disturbance, cardiovascular changes, endocrine imbalance, liver disease, sleep apnea, and orthopedic conditions. The primary treatment of this condition includes physical activity. Participating in organized sports has been shown to reduce weight and the comp...

Testosterone boosters (TB) are multi-ingredient dietary supplements that have gained popularity among athletes and the general population. However, certain ingredients in TB are associated with adverse events. The aim of the present study was to analyze dietary TB supplements available for sale online on shop.bodybuilding.com and amazon.com in ten...

Aim: to study the prevalence of alcohol and pre-workout caffeine use and their impact on sleep quality and injury among the young soccer players. Methods: this study examined the prevalence of alcoholic beverages and pre-workout caffeine consumption in young soccer players, as well as the effect of these substances on sleep disorders and injuries a...

Citation: Bezuglov, E.; Malyakin, G.; Emanov, A.; Malyshev, G.; Shoshorina, M.; Savin, E.; Lazarev, A.; Morgans, R. Are Late-Born Young Abstract: The aim of the study was to compare the status of somatic maturity, anthropometry, strength, speed, and soccer-specific technical skills of players from leading youth soccer academies born in different qu...

Evidence suggests that higher testosterone levels may provide an athletic advantage. Therefore, it is of practical interest to examine the association between testosterone levels and power- and strength-related traits in young professional track and field athletes, and to consider the factors that determine testosterone levels. The study involved 6...

Objective: Currently, there is no evidence to support trimetazidine (TMZ) administration aimed at enhancing physical performance or post-exercise recovery in healthy individuals or athletes from the general and athletic populations, respectively. Considering the lack of empirical data, from a scientific and practical perspective, it would be inter...

Purpose: To investigate the prevalence of asymptomatic radiologic groin region findings in adult professional soccer players using magnetic resonance imaging (MRI) and examine the influence of age and limb dominance on their occurrences. Methods: In this cross-sectional study, a total of 47 male professional soccer players (age 24.5 6 5.4 years, he...

History: On July 19th, 2022, a previously healthy seventeen-year-old professional soccer player (height 167 cm, weight 63 kg) suddenly fell on the field during a regular training session. He was performing goal shooting and did not have any contact with other players. He reported having left-sided chest pain, weakness, and shortness of breath that...

Purpose: To investigate the epidemiology of Anterior Cruciate Ligament Ruptures (ACLR), the patterns associated with their occurrence, and the return to play (RTP) in professional soccer players during the 2010/2011 to 2021/ 2022 competitive seasons in Russian Premier League (RPL). Methods: All ACLR sustained by players competing in the RPL across...

Studies examining the effects of new anti-doping measures on sports performance in elite athletes are scarce. During the last decade a number of new antidoping methods for detection of anabolic androgenic steroids were developed. We hypothesized that the implementation of these methods may cause a decrease of performance in athletic disciplines whe...

Background: Xenon and argon inhalation were included on the WADA Prohibited List in 2014 due to the reported positive effects on erythropoiesis and steroidogenesis that occur as a result of their application. Thus, the systematic review of studies supporting these notions is of interest. Methods: A thorough search on the effects of xenon and arg...

Background: The relative age effect (RAE) is most prevalent in highly competitive youth soccer and persists to a lesser extent in senior soccer. However, it is known that soccer players born in the second half of the year are as successful at senior level, indicating that they are equally talented although under-represented at youth level due to b...

Background: Currently there are no data examining the relationship between the serum concentration of vitamin D bio-chemical marker 25(OH)D and strength and speed characteristics in elite young track and field athletes. Moreover, there are currently no data examining the correlation of vitamin D status with testosterone concentration in elite youn...

BACKGROUND: Studying speed, strength, and endurance performance to identify putative predictor factors of talent in young soccer players is of great practical importance. METHODS: A cross-sectional study. Testing of 468 young soccer players, students of an elite soccer academy and its lower-tier subsidiary, both located in Moscow, Russia, aged 7-17...

Lecture given to internal medicine residents on approach to testosterone deficiency. Lecture serves as a primer for medical residents and contain information current as for 2023.

Purpose: The purpose of this study was to evaluate the effect of a single intake of citrulline at 3 g and 6 g doses in adult elite soccer players performing sport-specific exercise. Materials and methods: This randomized double-blind placebo-controlled study analyzed 18 soccer players from the top divisions of three European countries. Participa...

Acinetobacter species are gram-negative coccobacilli ubiquitous in nature and widely distributed in the environment. Acinetobacter baumannii is a bacteria commonly seen in the hospital setting, responsible for causing a wide range of bloodstream infections, urinary tract infections, secondary meningitis, infective endocarditis, and wound infections...

Platelet-rich plasma (PRP) injections are extremely popular in the management of sports injuries in elite athletes. However, data on the use of various administration protocols of PRP are contradictory. The efficacy of platelet-rich plasma in the treatment of muscle injuries in professional soccer players has to be contextualized within the sport-s...

There are little data on the incidence, and clinical course of COVID-19 among professional soccer players, and the studies examining putative complications of COVID-19 infections are probabilistic. On February 28, the WHO raised the COVID-19 threat assessment to its highest level. The COVID-19 outbreak became a significant challenge for world healt...

Purpose: To investigate the awareness and knowledge regarding various general sports endocrinology concepts and specific practices related to sport performance and health in the Russian track and field athletes. Methods: Professional Russian track-field athletes (n = 50, age = 23.1 y) were divided into 3 groups according to their level of sports p...

Background Xenon and argon inhalation were included in the WADA Prohibited List in 2014 due to the reported positive effects on erythropoiesis. There has also been suggestions that steroidogenesis stimulation occurs as a result of the use of these substances. Currently, Xenon is on the WADA Prohibited List notable affecting erythropoiesis as a Hypo...

The assessment of the structure and trends of doping perpetrations among athletes with a proven high prevalence of doping use might be of great practical interest. Non-compliance with the zero-tolerance policy towards anti-doping rules violators among sports communities with a high prevalence of doping offenses is the main cause of the ineffective...

Citation: Bezuglov, E.; Lazarev, A.; Khaitin, V.; Chegin, S.; Tikhonova, A.; Talibov, O.; Gerasimuk, D.; Waśkiewicz, Z. The Prevalence of Use of Various Post-Exercise Recovery Methods after Training among Elite Endurance Athletes. Int. J. Environ. Abstract: There is now compelling evidence of the effectiveness of a range of post-exercise recovery t...

Abstract Objective of the study was to collect a profile of elite-amateur female runners, who are able to run sub-3-hour marathon (S3HM) including their anthropometrical parameters, training regimes, and best non-marathon race performance and to detect predictor variables of faster marathon time. Methods and structure. Twenty-one Russian female run...

Introduction The relative age effect (RAE) has been described in detail in sports and education, however, to date there have been no studies comparing the patterns of its distribution in the most popular sports in Russia – ice hockey and soccer. The aim of the study Our main purpose was to study the prevalence of the RAE in Russian ice hockey and...

This is a presentation prepared for Nottingham Trent University-Physical Activity and the Endocrine System Conference held in 20-21 July 2021

Injuries of the metatarsal bones in football are relatively rare and in most cases are localized in the fifth metatarsal. The gold standard of the diagnosis of fractures in this area can be X-rays, which in most cases allows verifying the diagnosis. The treatment tactics depend on the localization of the fracture according to Lawrence and Botte’s c...

Background: The present study investigated the impact of competitive soccer on the short-term changes in isometric strength of the adductor muscle group during the competitive season. Methods: In this cohort study we evaluated the association between a serum marker of muscle damage [creatine phosphokinase (CPK)] and isometric strength of the add...

The influence of intense physical activity on the female body has been studied in many works, however, they mainly focused on professional athletes who begin to do sports at a young age, and with sports being their main profession. Purpose of the study. To study the parameters of the menstrual cycle in semi-professional runners who can run a marath...

1 ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России (Сеченовский Университет), Москва, Россия; 2 ЧОУ ВО «Московский университет имени С.Ю. Витте», Москва, Россия; 3 ФГБУ «Федеральный научно-клинический центр спортивной медицины и реабилитации Федерального медико-биологического агентства», Москва...

Introduction At present, there are no data regarding the incidence and clinical course of COVID-19 among professional soccer players, and the studies examining putative complications of COVID-19 infections are probabilistic. Thus, examining the incidence of COVID-19 and various aspects of its clinical course in a group of adult professional soccer...

Background: The present study assessed the prevalence of non-contact muscle injuries of the lower limbs, including hamstring injuries, in professional Russian soccer players who regularly perform Salah, an obligatory Muslim prayer performed 5 times a day. Methods: Using a retrospective cohort study design, 68 professional male soccer players (ex...

More and more women regularly participate in sports, which is a significant factor in improving both quality and life expectancy. However, over the past decades there has been an increase in the number of women in professional sports and sports that require maximum endurance (ultramarathons, “ironman” triathlon, and so on), which makes it relevant...

Background The present-day conservative treatment algorithms of Osgood-Shlatter Disease (OSD) are often inadequate for young athletes because they require extremity immobilization and avoidance of sports, and hence the longer duration of rehabilitation. Therefore, the development of safe and efficacious treatment protocols for young athletes is of...

Objective: to evaluate the effectiveness of injections of platelet-rich plasma in the treatment of muscle injuries of the lower limb grade 2A-2B inprofessional soccer players. Materials and methods: a retrospective analysis of the duration and the methods of muscle damage treating in several leading professional football (soccer) clubs in Russia wa...

Abstract Background Currently, no data is available regarding the association between professional experience or limb dominance and the prevalence of asymptomatic knee joint lesions in adult professional male soccer players. Hypothesis The prevalence of the accumulated changes increases with training experience. This is especially true for the dom...

Objective: to evaluate the effectiveness of injections of platelet-rich plasma in the treatment of muscle injuries of the lower limb grade 2A-2B in professional soccer players. Materials and methods: a retrospective analysis of the duration and the methods of muscle damage treating in several leading professional football (soccer) clubs in Russia...

Introduction: The treatment of back pain (BP) is one of the most common problems in medical practice. Often, BP correlates with detectable degenerative changes in the spine, but these changes do not always make the main contribution to the development of pain. We conducted an analysis of the clinical picture of patients with back pain and its corre...

The survey shows current ideas about the treatment of meniscus injuries among patients of different age groups. Various asymptomatic changes in the knee joint in populations with different level of physical activity with a pain syndrome can cause excessive indications for surgical treatment. A comparative analysis of the effectiveness of conservati...

Objective. To assess the prevalence of vitamin D deficiency in young professional football players residing in the Russian Federation and analyze the measures for its correction. Patients and methods. In this prospective cohort study, we analyzed the results of examination of 95 young football players (aged 12–17 years) from the football Academy ‘...