Raphaël Faiss
YOU?
Author Swipe
View article: Endocrine and androgenic response to altitude training in professional cyclists
Endocrine and androgenic response to altitude training in professional cyclists Open
This study investigated endocrine and steroidal blood markers in 31 male elite cyclists monitored over 7 weeks, including a 3 week altitude training camp either at 2050 m ( n = 19) or 3000 m ( n = 12). Serum samples were analysed for stero…
View article: Haematological adaptations to high‐altitude and heat acclimation training in elite male cyclists
Haematological adaptations to high‐altitude and heat acclimation training in elite male cyclists Open
High‐altitude training is widely adopted by endurance athletes with the aim of increasing total haemoglobin mass (tHb mass ) and thereby endurance exercise performance. However, divergent effects on tHb mass and exercise performance have b…
View article: Estimation of Plasma Volume by Machine Learning to Improve the Interpretation of the Athlete Biological Passport
Estimation of Plasma Volume by Machine Learning to Improve the Interpretation of the Athlete Biological Passport Open
The identification of confounding factors related to plasma volume (PV) fluctuations is crucial for appropriate qualitative interpretations of Athlete Biological Passport (ABP) profiles. As part of ongoing efforts to remove PV variance fro…
View article: Muscle oxygen saturation plateau: Definition and verification in different oxygen availability conditions in locomotor and non‐locomotor muscles
Muscle oxygen saturation plateau: Definition and verification in different oxygen availability conditions in locomotor and non‐locomotor muscles Open
Novel wearable near‐infrared spectroscopy devices allow for a better understanding of muscle oxygenation kinetics during exercise. A muscle oxygen saturation (SmO 2 ) plateau is often applied in the scientific literature, but clear criteri…
View article: Innovations in hypoxic training
Innovations in hypoxic training Open
Altitude training is persistently of high interest among athletes, coaches and sport scientists trying to optimize performance at sea level or at altitude. The effects of hypoxic conditions have been investigated for more than 150 years af…
View article: Validity of a machine learning estimation of blood volumes during altitude training
Validity of a machine learning estimation of blood volumes during altitude training Open
Introduction Altitude training is widely used in endurance sports to improve near sea-level performance through physiological adaptations. Overall gains of 1% total hemoglobin mass (Hbmass) for each 100 hours spent at altitude may be expec…
View article: The effects of altitude training on hormonal response in professional cyclists
The effects of altitude training on hormonal response in professional cyclists Open
Introduction The Alps offer numerous possibilities for athletes to prepare competitions at altitude training with the aims of further gains for near sea-level performances through physiological adaptations. Hematological adaptations (e.g.,…
View article: „Brain doping” substances: prohibited or not in sports?
„Brain doping” substances: prohibited or not in sports? Open
There is increasing interest in the area of brain doping among athletes. The term 'brain doping' refers to enhancing mental performance through the non-medical use of specific pharmacological substances, such as drugs and medicines. Despit…
View article: Accelerated Red Blood Cell Turnover Following Extreme Mountain Ultramarathon?
Accelerated Red Blood Cell Turnover Following Extreme Mountain Ultramarathon? Open
Introduction Mountain ultramarathon (MUM) induces extreme physiological stress for the human body. For instance, a decrease in total hemoglobin mass (Hbmass) due to severe hemolysis is historically suspected. Nevertheless, hematological ch…
View article: Repeated-sprint training in hypoxia: A review with 10 years of perspective
Repeated-sprint training in hypoxia: A review with 10 years of perspective Open
Over the past decade, numerous studies have investigated an innovative "live low-train high" approach based on the repetition of short (<30 s) "all-out" sprints with incomplete recoveries in hypoxia; the so-called Repeated-Sprint training …
View article: Predicting Future Athletic Performance in Young Female Road Cyclists Based on Aerobic Fitness and Hematological Variables
Predicting Future Athletic Performance in Young Female Road Cyclists Based on Aerobic Fitness and Hematological Variables Open
Purpose : This study aimed to determine whether the initial levels of aerobic fitness and hematological variables in young female road cyclists are related to their athletic performance development during their careers. Methods : Results o…
View article: High‐level performances following low altitude training and tapering in warm environments in elite racewalkers
High‐level performances following low altitude training and tapering in warm environments in elite racewalkers Open
Current guidelines for prolonged altitude exposure suggest altitude levels ranging from 2000 to 2500 m to optimize an increase in total hemoglobin mass (Hbmass). However, natural low altitude locations (<2000 m) remain popular, highlightin…
View article: Yearly intrasubject variability of hematological biomarkers in elite athletes for the Athlete Biological Passport
Yearly intrasubject variability of hematological biomarkers in elite athletes for the Athlete Biological Passport Open
Confounding factors including exercise and environments challenge the interpretation of individual Athlete Biological Passports (ABPs). This study aimed to investigate the natural variability of hematological ABP parameters over 1 year in …
View article: Prediction of plasma volume and total hemoglobin mass with machine learning
Prediction of plasma volume and total hemoglobin mass with machine learning Open
Hemoglobin concentration ([Hb]) is used for the clinical diagnosis of anemia, and in sports as a marker of blood doping. [Hb] is however subject to significant variations mainly due to shifts in plasma volume (PV). This study proposes a ne…
View article: Competitive performance as a discriminator of doping status in elite athletes
Competitive performance as a discriminator of doping status in elite athletes Open
As the aim of any doping regime is to improve sporting performance, it has been suggested that analysis of athlete competitive results might be informative in identifying those at greater risk of doping. This research study aimed to invest…
View article: Impact of low‐volume blood withdrawal on hematological biomarkers for the athlete biological passport
Impact of low‐volume blood withdrawal on hematological biomarkers for the athlete biological passport Open
This study investigated the impact of low‐volume blood withdrawal on the hematological biomarkers currently considered for anti‐doping purposes. After baseline measurement (D − 7), a 140 mL blood withdrawal was completed (D + 0) on 12 heal…
View article: Editorial: Insights in Anti-doping Sciences: 2021
Editorial: Insights in Anti-doping Sciences: 2021 Open
EDITORIAL article Front. Sports Act. Living, 12 April 2023Sec. Anti-doping Sciences & Integrity in Sport Volume 5 - 2023 | https://doi.org/10.3389/fspor.2023.1195599
View article: Where is the frontier between integrity in sport and anti-doping if it exists?
Where is the frontier between integrity in sport and anti-doping if it exists? Open
SPECIALTY GRAND CHALLENGE article Front. Sports Act. Living, 15 March 2023Sec. Anti-doping Sciences & Integrity in Sport Volume 5 - 2023 | https://doi.org/10.3389/fspor.2023.1158055
View article: Self-Declared and Measured Prevalence of Glucocorticoid Use in Polish Athletes
Self-Declared and Measured Prevalence of Glucocorticoid Use in Polish Athletes Open
Glucocorticoids (GCs) are included in the list of prohibited substances and methods in sport published annually by the World Anti-Doping Agency (WADA). In its 2022 update, the WADA list prohibits all injectable routes of administration of …
View article: Prediction of plasma volume and total hemoglobin mass with machine learning
Prediction of plasma volume and total hemoglobin mass with machine learning Open
Anemia is a widespread disease commonly diagnosed through hemoglobin concentration ([Hb]) thresholds set by the World Health Organization (WHO). However, [Hb] is subject to significant variations mainly due to shifts in plasma volume (PV) …
View article: Effect of low-volume blood withdrawal on hematological biomarkers
Effect of low-volume blood withdrawal on hematological biomarkers Open
Introduction
The hematological module of the Athlete Biological Passport (ABP) consists of individual and longitudinal monitoring of hematological parameters biomarkers responsive to erythropoiesis alteration. Based on an adaptive Bayesia…
View article: Future opportunities for the Athlete Biological Passport
Future opportunities for the Athlete Biological Passport Open
The Athlete Biological Passport (ABP) was introduced to complement the direct anti-doping approach by indirectly outlining the possible use of prohibited substances or methods in sports. The ABP proved its effectiveness, at least through a…
View article: Variability of the urinary and blood steroid profiles in healthy women
Variability of the urinary and blood steroid profiles in healthy women Open
The steroidal module of the Athlete Biological Passport (ABP) targets the use of exogenous androgenous anabolic steroids (EAAS) in elite sport by monitoring urinary steroid profiles. Urine and blood samples were collected weekly during two…
View article: Evaluation of the use of glucocorticosteroids by athletes in Poland in the light of the amended anti-doping regulations
Evaluation of the use of glucocorticosteroids by athletes in Poland in the light of the amended anti-doping regulations Open
Subject of research Glucocorticoids (GCs) have been included in the list of prohibited substances and methods in sport since 2004 by the World Anti-Doping Agency (WADA). In the latest 2022 update of the list in the World Anti-Doping Code a…
View article: Removal of the influence of plasma volume fluctuations for the athlete biological passport and stability of haematological variables in active women taking oral contraception
Removal of the influence of plasma volume fluctuations for the athlete biological passport and stability of haematological variables in active women taking oral contraception Open
The haematological module of the athlete biological passport (ABP) monitors longitudinal haematological variations that could be indicative of blood manipulation. This study applied a multi‐parametric model previously validated in elite cy…