PortaMon
The gold-standard research device for the measurement of muscle oxygenation
Publications using the PortaMon
Acute effects of moderate-intensity continuous and high-intensity interval exercise on vascular function
Purpose To assess and compare the acute effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on central and peripheral arterial stiffness, as well as endothelial and microvascular reactivity in healthy, …
Comparing Local and Remote Ischemic Preconditioning for Improving Repeated Sprint Ability in Male Basketball Players
Purpose: This study examined whether ischemic preconditioning (IPC) improves repeated sprint ability (RSA) in basketball players and compared the effects of local IPC (LIPC) and remote IPC (RIPC). Methods: Eighteen male college basketball players …
Effects of cold water immersion versus active recovery on oxidative stress, redox gene expression and mitochondrial adaptations after strength training
Abstract We compared the acute and chronic effects of postexercise cold water immersion (CWI) and active recovery (ACT) on oxidative stress, redox‐related gene expression, mitochondrial adaptations and muscle oxidative capacity. In a crossover study, …
Effects of Repeated Sprint Training With Hypoventilation on Specific Performance in Elite Epee Fencers
Purpose: This study investigated the effects of repeated sprint training in hypoxia (RSH) induced by voluntary hypoventilation (VHL) on sport-specific performance in elite epee fencers. Methods: Twenty-two elite-level fencers (national to …
High-intensity interval training with blood-flow restriction enhances sprint and maximal aerobic power in male endurance athletes
High-intensity interval training (HIIT) can improve endurance performance. We investigated the concurrent impact of HIIT and blood-flow restriction (BFR) as a novel approach to further enhance maximal aerobic and anaerobic physiology and performances …
Muscle oxygenation measured by near‐infrared spectroscopy during resistance training: A scoping review
Abstract Near‐infrared spectroscopy (NIRS) is a noninvasive optical technique used to estimate local muscle oxygenation by measuring hemoglobin‐related variables and muscle oxygen saturation. This information helps understand how skeletal muscles …
Downhill-walking exercise training in a patient with symptomatic peripheral artery disease: A case report
Introduction: Supervised exercise training (SET) is recommended as first-line therapy for symptomatic peripheral artery disease (PAD), but pain and limited tolerance often restrict the effective training dose. Eccentric exercise, such as downhill …
Judicious elevation of ambient carbon dioxide during hypobaric hypoxia to improve oxygenation in airline passengers - a randomized feasibility study
Despite pressurization of airliner cabins, some passengers experience in-flight hypobaric hypoxia with blood oxygen saturation dropping below 90%, potentially causing discomfort and increasing the risk of medical events. Enrichment of the cabin air …
Looking Under the Hood of Elite Rowers: Skeletal Muscle Determinants of Rowing Performance
We aimed to identify the physiological and muscle characteristics associated with mean power output in the final stage of a rowing incremental test in elite rowers. Twenty-two national level rowers (n = 9 female) completed the following assessments …
A comparison of the neuromuscular, cardiopulmonary and muscle oxygenation responses to single‐ and double‐leg cycling in older adults
Previous work in younger adults has shown that during small muscle mass exercise, the tolerable degree of neuromuscular impairment at task failure is greater than during large muscle mass exercise. However, no study has compared the neuromuscular …
Beetroot juice modulates physiological responses and accelerates recovery during the special judo performance: a randomized trial
The ability of nitrate (NO₃⁻)-rich beetroot juice (BJ) to improve exercise depends on training status. However, the mechanisms are understudied. The aim of this study was to investigate the impact of acute BJ supplementation on the Special Judo …
Combined effects of inspiratory and core muscle training on respiratory and core muscle function, limb muscle oxygenation and swimming performance
This study examined the effects of core training (CMT), inspiratory muscle training (IMT) and their combination (CIT) on strength and endurance of respiratory and core muscles, muscle oxygenation and swimming performance. Twenty-five competitive male …
Distinguishing Muscle Oxygen Saturation from Tissue Oxygen Saturation: Accuracy, Limitations, and Practical Utility in Muscle Oximetry
Muscle near-infrared spectroscopy (mNIRS) is widely used to measure skeletal muscle oxygen saturation, named as muscle-specific oxygen saturation (SmO₂) or tissue oxygen saturation (StO₂). The distinction between SmO₂ and the less specific …
Impaired microvascular reactivity in post-COVID-19 syndrome is independent of cardiorespiratory fitness
Current evidence demonstrates that patients who suffer from long-term SARS-CoV-2 symptoms [i.e., post-COVID-19 syndrome (PCS)] often present muscle fatigue and dyspnea. This is discussed to be a result of vascular dysfunction and oxidative stress …
Intradialytic neuromuscular electrical stimulation improves muscle oxygenation and aerobic capacity in end-stage renal disease: a single-blind, randomized controlled trial
Patients with end-stage renal disease (ESRD) undergoing hemodialysis (HD) often exhibit substantial impairments in aerobic capacity and skeletal muscle oxidative function, contributing to physical deconditioning and elevated cardiovascular risk. …
Effects of 6-day ischaemic preconditioning on adaptations to an altitude training camp in cross-country skiers
To determine whether ischaemic preconditioning (IPC) administered prior to an altitude training camp could enhance aerobic fitness and endurance performance in athletes. In a randomized controlled trial, 19 competitive (Tiers 3–5) cross-country (XC) …
Exercise Intensity but Not Cadence Affects the Dynamics of Muscle Oxygenation and Pulmonary Oxygen Uptake at the Onset of Exercise in Trained Cyclists
Purpose: This study examined how exercise intensity and pedaling cadence influence the on-transient kinetics of pulmonary oxygen uptake ( V˙O2) and muscle oxygenation in trained cyclists. Specifically, we evaluated responses during transitions to …
Inter-effort hypoxia recovery during high-intensity intermittent exercise enhances oxygen uptake at the onset of efforts while maintaining exercise tolerance
Exercise training in hypoxia enhances physiological adaptations improving exercise performance. However, acute hypoxia generally reduces high-intensity exercise tolerance, limiting its application in sports training. Here, we investigated whether …
Metabolic, V̇O$_textrm2$ kinetics, and muscle oxygenation responses at and above maximal lactate steady state in trained male rowers
This study aimed to compare physiological responses during rowing ergometer exercise at the maximal lactate steady state (MLSS) and 5% above the MLSS (MLSS+5%). Blood lactate concentration (BLC), oxygen uptake (V̇O2) kinetics, heart rate (HR), and …
Peak oxygen consumption is positively associated with estimates of oxygen extraction and microvascular blood volume in veterans with chronic kidney disease
Peak oxygen consumption (V_ O2peak) is reduced in patients with chronic kidney disease (CKD). Although cardiovascular and skeletal muscle factors are implicated in the declines of V_ O2peak, few studies have evaluated muscle oxygenation responses …