PortaMon
The gold-standard research device for the measurement of muscle oxygenation
Publications using the PortaMon
The Optimal Treatment Time Of Dry Cupping Therapy To Induce Changes In Local Blood Flow At The Upper Trapezius
Context: Musculoskeletal neck and shoulder pain is a prevalent condition with nearly two-thirds of the population experiencing it sometime in their lifespan; factors may include activity level, sex, stress, and postural deficits. The treatment …
A comparison of VȮ2, and muscle and prefrontal cortex tissue oxygen extraction between short and long-term aerobically trained men aged 40-60 years
International Journal of Exercise Science 13(3): 964-978, 2020. This study was designed to compare systemic O2 utilization (VȮ2), and changes in tissue O2 extraction [deoxyhemoglobin ($Δ$HHb)] in the vastus lateralis (VL), gastrocnemius (GAST) and …
Concurrent adaptations in maximal aerobic capacity, heat tolerance, microvascular blood flow and oxygen extraction following heat acclimation and ischemic preconditioning
We investigated the effects of: 1) Ischemic pre-conditioning (IPC) plus a concurrent five-day heat acclimation + IPC (IPC + HA), 2) five-day HA with sham IPC (HA), or 3) control (CON) on thermoneutral measurements of endurance performance, resting …
Does ischemic pre-conditioning during the recovery period between two successive matches preserve physical performance in badminton doubles players ?
Changes in physical performance were assessed in response to two successive doubles badminton matches with implementation of ischemic pre-conditioning (IPC) or sham treatment during recovery period between matches. Eight French national team …
Evolution of Muscular Oxygenation during a Walking Test in Preterm Children
Objective: To explore measures of peripheral muscular oxygenation, coupled to gait characteristics, between preterm and full-term children during a 6-minute walking test (6MWT). Study design: Prepubescent children performed a 6MWT. During the test, …
Exposure to acute normobaric hypoxia results in adaptions of both the macro- and microcirculatory system
Although acute hypoxia is of utmost pathophysiologic relevance in health and disease, studies on its effects on both the macro- and microcirculation are scarce. Herein, we provide a comprehensive analysis of the effects of acute normobaric hypoxia on …
Ischemic Preconditioning Enhances Aerobic Adaptations to Sprint-Interval Training in Athletes Without Altering Systemic Hypoxic Signaling and Immune Function
Optimizing traditional training methods to elicit greater adaptations is paramount for athletes. Ischemic preconditioning (IPC) can improve maximal exercise capacity and up-regulate signaling pathways involved in physiological training adaptations. …
Land vs. water HIIE effects on muscle oxygenation and physiological parameter responses in postmenopausal women
Muscle oxygenation (MO) status is the dynamic balance between O2 utilization and O2 delivery. Low-impact high-intensity interval exercise MO responses in the exercise and recovery stage are still unclear. We compared the differences in MO and …
Physiological Responses to Repeated Running Sprint Ability Tests: A Systematic Review.
The purpose of this study was to review acute physiological responses induced by repeated running sprint ability (RRSA) tests that could serve as references for practitioners utilising repeated sprints as a performance measure with athletes. This …
Role of exercise, cold, and the biological clock on energy balance in humans: The ACTIBATE study
Cold exposure has been proposed as a potential tool to face obesitysince it is able to increase energy expenditure (i.e., cold induced thermogenesis –CIT). This increase is partially mediated by brown adipose tissue (BAT). Nevertheless, little is …
Rolling massage acutely improves skeletal muscle oxygenation and parameters associated with microvascular reactivity: The first evidence-based study
Although it has been claimed that rolling massage (RM), may lead to improvements in skeletal muscle oxygenation, metabolism, blood flow, and vascular function, scientific evidence has not yet been provided. Thus, the current study investigated the …
Sequential Pulse Compression's Effect on Blood Flow in the Lower-Extremity
CONTEXT: Several interventions are available to reduce the intensity and duration of the unwanted effects (eg, muscle soreness) associated with physical activity, such as massage, compression garments, and sequential pulse compression (SPC). Such …
Similar recovery of maximal cycling performance after ischemic preconditioning, neuromuscular electrical stimulation or active recovery in endurance athletes
This study investigated the efficacy of ischemic preconditioning (IPC) on the recovery of maximal aerobic performance and physiological responses compared with commonly used techniques. Nine endurance athletes performed two 5-km cycling time trials …
Sport-related femoral artery occlusion detected by near-infrared spectroscopy and pedal power measurements: a case report
Objectives: Approximately one in five professional cycling athletes will eventually develop a sport-related vascular problem. However, detecting such flow limitation is a diagnostic challenge as the sensitivity of the currently available standard …
The use of acute oxygen supplementation upon muscle tissue saturation during repeat sprint cycling
This study examined performance and physiological responses (power output, tissue saturation index) to repeat sprint cycling with oxygen supplementation (O2Supp [fraction of inspired oxygen 1.00]). Fourteen amateur male cyclists took part. Two visits …
Effects of inspiratory muscle warm-up on locomotor muscle oxygenation in elite speed skaters during 3000 m time trials
Purpose: It has been shown that an inspiratory muscle warm-up (IMW) could enhance performance. IMW may also improve the near-infrared spectroscopy (NIRS)-derived tissue oxygen saturation index (TSI) during cycling. However, there exists contradictory …
Electrically evoked wrist extensor muscle fatigue throughout repetitive motion as measured by mechanomyography and near-infrared spectroscopy
Repetitive electrically-evoked muscle contraction leads to accelerated muscle fatigue. This study assessed electrically-evoked fatiguing muscle with changes to mechanomyography root mean square percentage (%RMS-MMG) and tissue saturation index (%TSI) …
Active Preconditioning With Blood Flow Restriction or/and Systemic Hypoxic Exposure Does Not Improve Repeated Sprint Cycling Performance
Purpose: The aim of this study was to evaluate the effects of active preconditioning techniques using blood flow restriction or/and systemic hypoxic exposure on repeated sprint cycling performance and oxygenation responses. Methods: Participants were …
Acute Effects of L-Arginine Supplementation on Oxygen Consumption Kinetics and Muscle Oxyhemoglobin and Deoxyhemoglobin during Treadmill Running in Male Adults.
L-arginine is used as a nitric oxide related supplement intended to improve sports performance, and to enhance muscular recovery during exercise. However, the literature is inconclusive. The aim of this study was to determine the effects of acute …
Differences in muscle oxygenation between young and middle-aged recreationally active men during high-volume resistance exercise
The aim of this study was to compare muscle oxygenation of the vastus lateralis during a high-volume isokinetic resistance exercise protocol (HVP) between young adult (YA) and middle-aged adult (MA) men. Twenty recreationally trained men were …