Takao Akama
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View article: Determinants of agility across biological maturation status in soccer players
Determinants of agility across biological maturation status in soccer players Open
These findings suggest that the influence of biological maturation on agility is most pronounced between Pre- and Circa-PHV, primarily driven by reaction time and lower limb power. At Post-PHV, factors beyond cognitive and physical abiliti…
View article: Is the Agility Test-Derived Change-of-Direction Deficit a Valid Indicator of Time Loss During Directional Change?
Is the Agility Test-Derived Change-of-Direction Deficit a Valid Indicator of Time Loss During Directional Change? Open
Purpose The change of direction (COD) deficit isolates time loss from directional changes, but the validity of deriving it from an agility test is unknown. This study examined the validity of the COD deficit calculated using an agility tes…
View article: Association between prolactin and history of stress fracture in elite sprinters and jumpers
Association between prolactin and history of stress fracture in elite sprinters and jumpers Open
Purpose Research related to stress fractures and the female athlete triad is abundant. However, since there is not enough evidence to support the risk factors for stress fractures is not sufficient. The aim of this study is to investigate …
View article: Navigating implementation barriers: a holistic approach to improving exertional heat stroke management
Navigating implementation barriers: a holistic approach to improving exertional heat stroke management Open
Objectives To assess the shift in medical volunteers’ perception and practice surrounding exertional heat stroke (EHS) prehospital management after the Tokyo 2020 Olympic Games. Methods An online survey was sent to medical volunteers assig…
View article: A retrospective analysis of injury and illness incidence in four new extreme sports debuting during the Tokyo 2020 Summer Olympic Games: surfing, BMX freestyle, sport climbing, and skateboarding
A retrospective analysis of injury and illness incidence in four new extreme sports debuting during the Tokyo 2020 Summer Olympic Games: surfing, BMX freestyle, sport climbing, and skateboarding Open
Objective Surfing, bicycle motocross (BMX) freestyle, sport climbing, and skateboarding are four extreme sports that were introduced at the 2020 Tokyo Olympics. As such, there are currently no reports available on the number of injuries or…
View article: Survey of the Awareness and Knowledge of Anti-Doping among Elite and General Triathlon Athletes
Survey of the Awareness and Knowledge of Anti-Doping among Elite and General Triathlon Athletes Open
Doping tests have been conducted in triathlon competitions in which general athletes have been participating since 2018.Therefore, since all triathlon athletes, regardless of competitive level, may be subjected to doping testing, there is …
View article: Incidence and factor analysis for the heat-related illness on the Tokyo 2020 Olympic and Paralympic Games
Incidence and factor analysis for the heat-related illness on the Tokyo 2020 Olympic and Paralympic Games Open
Introduction Among the 43 venues of Tokyo 2020 Olympic Games (OG) and 33 venues of Paralympic Games (PG) were held, the heat island effect was highly expected to cause heat-related illnesses in the outdoor venues with maximum temperatures …
View article: Emergency department activities at the Athletes' Village during the Tokyo 2020 Olympic and Paralympic Games
Emergency department activities at the Athletes' Village during the Tokyo 2020 Olympic and Paralympic Games Open
Aim More than 15,000 elite athletes participated in the Tokyo 2020 Olympic and Paralympic Games. Providing adequate medical services to these elite athletes was a priority. Hence, a polyclinic was established in the Athletes' Village. Visi…
View article: Effects of Intestinal Bacterial Hydrogen Gas Production on Muscle Recovery following Intense Exercise in Adult Men: A Pilot Study
Effects of Intestinal Bacterial Hydrogen Gas Production on Muscle Recovery following Intense Exercise in Adult Men: A Pilot Study Open
This study aimed to examine the effects of hydrogen gas (H2) produced by intestinal microbiota on participant conditioning to prevent intense exercise-induced damage. In this double-blind, randomized, crossover study, participants ingested…
View article: IOC consensus statement on recommendations and regulations for sport events in the heat
IOC consensus statement on recommendations and regulations for sport events in the heat Open
This document presents the recommendations developed by the IOC Medical and Scientific Commission and several international federations (IF) on the protection of athletes competing in the heat. It is based on a working group, meetings, fie…
View article: Development of simple detection method of polyreactive secretory immunoglobulin A in saliva
Development of simple detection method of polyreactive secretory immunoglobulin A in saliva Open
The level of secretory immunoglobulin A (SIgA) in saliva is associated with the risk of upper respiratory infection and has been identified as a condition indicator for athletes and an indicator of mucosal immune function in the elderly. I…
View article: A Study of Race Pacing in the Running Leg of the Japan University Triathlon Championship
A Study of Race Pacing in the Running Leg of the Japan University Triathlon Championship Open
Choosing an appropriate pacing strategy is important for good triathlon performance. In the Japan Student Triathlon Championship held in 2020, the men's category was divided into two groups, which was a different racing style from the prev…
View article: Gender bias in sports medicine: an international assessment of sports medicine physicians’ perceptions of their interactions with athletes, coaches, athletic trainers and other physicians
Gender bias in sports medicine: an international assessment of sports medicine physicians’ perceptions of their interactions with athletes, coaches, athletic trainers and other physicians Open
Objectives To evaluate the difference between female and male sports medicine physicians regarding disrespectful attitudes and sexual harassment perceived from athletes, coaches, physicians, athletic trainers (ATs) and organisations/admini…
View article: Study on the Efficiency of Data Collection, Organization and Feedback Methods for Triathlon Races
Study on the Efficiency of Data Collection, Organization and Feedback Methods for Triathlon Races Open
Considering the problems of data handling methods in the sports field, the use of smartphones, free tools, going online with the COVID-19 disaster, reducing the workload of data managers, creating graphs automatically, and building a syste…
View article: Dicer-mediated miRNA processing is not involved in controlling muscle mass during muscle atrophy
Dicer-mediated miRNA processing is not involved in controlling muscle mass during muscle atrophy Open
Muscle atrophy occurs in a variety of physiological and pathological conditions. Specific molecular networks that govern protein synthesis and degradation play important roles in controlling muscle mass under diverse catabolic states. Micr…
View article: Prehospital management of exertional heat stroke at sports competitions: International Olympic Committee Adverse Weather Impact Expert Working Group for the Olympic Games Tokyo 2020
Prehospital management of exertional heat stroke at sports competitions: International Olympic Committee Adverse Weather Impact Expert Working Group for the Olympic Games Tokyo 2020 Open
Objectives This document aimed to summarise the key components of exertional heat stroke (EHS) prehospital management. Methods Members of the International Olympic Committee Adverse Weather Impact Expert Working Group for the Olympic Games…
View article: Beneficial Effects of Yoga Stretching on Salivary Stress Hormones and Parasympathetic Nerve Activity.
Beneficial Effects of Yoga Stretching on Salivary Stress Hormones and Parasympathetic Nerve Activity. Open
This study aimed to determine the effect of yoga stretching on salivary stress hormones and cardiac autonomic nervous system. To our knowledge, this study is the first to investigate changes in cardiac autonomic nervous system after yoga s…
View article: Hematology and immunology
Hematology and immunology Open
Aims] Excessive amounts of reactive oxygen species (ROS) generated by exercise causes oxidative stress to the body, and decreases exercise performance.Antioxidants can reduce ROS and oxidative stress.So it is thought that antioxidants may …
View article: Physical Activity Amount and Cognitive Impairment in Korean Elderly Population
Physical Activity Amount and Cognitive Impairment in Korean Elderly Population Open
The relationship between physical activity amount and cognitive function in elderly Koreans has received little attention. This study therefore aimed to understand the independent and common link between cognitive function and physical act…
View article: Tape stripping method is useful for the quantification of antimicrobial peptides on the human skin surface including the stratum corneum
Tape stripping method is useful for the quantification of antimicrobial peptides on the human skin surface including the stratum corneum Open
Antimicrobial peptides (AMPs) play an important role in innate immunity in human skin. It is known that AMPs mainly function in the stratum corneum. Therefore, AMP concentrations in the stratum corneum need to be precisely measured to clar…
View article: Changes in Body Composition and Its Relationship to Performance in Elite Female Track and Field Athletes Transitioning to the Senior Division
Changes in Body Composition and Its Relationship to Performance in Elite Female Track and Field Athletes Transitioning to the Senior Division Open
Many elite female athletes struggle to maintain performance while transitioning from high school to university-level (senior) sports. This study explores factors of body composition that influenced performance in elite junior female track …
View article: The prevalence of anemia in Japanese Universiade athletes, detected with longitudinal preparticipation medical examinations
The prevalence of anemia in Japanese Universiade athletes, detected with longitudinal preparticipation medical examinations Open
Background No reports have evaluated the long‐term trends of the prevalence of anemia in Universiade athletes using preparticipation medical examinations (PPMEs). We aimed to investigate the prevalence of anemia among Japanese Universiade …
View article: Changes in Stress and Appetite Responses in Male Power-Trained Athletes during Intensive Training Camp
Changes in Stress and Appetite Responses in Male Power-Trained Athletes during Intensive Training Camp Open
An intensive consecutive high-volume training camp may induce appetite loss in athletes. Therefore, this study aimed to investigate the changes in stress and appetite responses in male power-trained athletes during an intensive training ca…