PortaMon
The gold-standard research device for the measurement of muscle oxygenation
Publications using the PortaMon
Cardiorespiratory Fitness Improvements Following Low‐Frequency Training Are Not Inferior to High‐Frequency Training Matched for Intensity and Volume
Epidemiological evidence suggests low-frequency physical activity provides health benefits, but the physiological impacts of weekly training frequency are understudied. We investigated whether “Weekend Warrior” (WW) training was inferior to …
Exercise responses to perceptually regulated high intensity interval exercise with continuous and intermittent hypoxia in inactive overweight individuals
To investigate the acute effects of hypoxia applied during discrete work and recovery phases of a perceptually regulated, high-intensity interval exercise (HIIE) on external and internal loads in inactive overweight individuals. On separate days, 18 …
Experimental Study of Airworthiness Compliance Verification of High-Temperature Environment in Aircraft Cockpit
The aim of this study was to assess the applicability of the Mechanical Systems Coordination Working Group’s (MSCWG) findings, based on FAR 25.831(g), to Chinese pilots through a human physiological experiment conducted in a high-temperature …
Therapeutic exercises, manual therapy, and health education program for adolescents with temporomandibular disorders: face-to-face and online multimodal rehabilitation protocol for a randomized controlled clinical trial
Background Multimodal rehabilitation has shown good results in adults with temporomandibular disorder (TMD), but there is still doubt regarding the protocol’s ideal format (face-to-face or online), and its effectiveness among adolescents. The purpose …
Cardiac Hemodynamics, Tissue Oxygenation, and Functional Capacity in Post-COVID-19 Patients
Background and Objectives: This study aimed to evaluate and compare the functional capacity of post-COVID-19 patients with a control group and analyze cardiac hemodynamics and muscle tissue oxygenation responses during assessment protocols in both …
Determination of Ventilatory Thresholds Using Near-Infrared Spectroscopy in Recreational Endurance and CrossFit Athletes
To define training zones, ventilatory thresholds (VTs) are commonly established by cardiopulmonary gas-exchange analysis during incremental exercise tests. Portable near-infrared spectroscopy (NIRS) devices have emerged as a potential tool for …
Incremental shuttle walking test for calf muscle oxygenation assessment in peripheral arterial disease: a cross-sectional study
People with peripheral arterial disease (PAD) and intermittent claudication (IC) experience impaired walking due to an imbalance between muscle oxygen supply and demand during exercise. Studies with near-infrared spectroscopy (NIRS) during treadmill …
Muscle Endurance Training in a Person with Friedreich’s Ataxia
Friedreich’s ataxia (FRDA) results from a faulty mitochondrial protein known as Frataxin. The purpose of this case report was to test whether skeletal muscle in FRDA can adapt to an endurance-based training program using neuromuscular electrical …
Optimizing active recovery strategies for finger flexor fatigue
Introduction: Active recovery (AR) is used during exercise training; however, it is unclear whether the AR should involve the whole body, only the upper extremities, or only the lower extremities when aiming to maintain localized upper body …
Thoracic load carriage impairs the acute physiological response to hypoxia in healthy males
To assess the impact of thoracic load carriage on the physiological response to exercise in hypoxia. Healthy males (n = 12) completed 3 trials consisting of 45 min walking in the following conditions: (1) unloaded normoxia (UN; FIO2:20.93%); (2) …
Efectos del Entrenamiento Respiratorio de Fuerza versus Resistencia sobre la Desoxigenación Tisular inducida por Ejercicio de Alta Intensidad en Atletas de Resistencia Aeróbica
Introducción. El entrenamiento de músculatura respiratoria (EMR) aminora los efectos negativos del reflejo metabólico sobre el rendimiento físico, mejorando la oxigenación en áreas cerebrales implicadas en actos motores, músculos …
Exercise training-induced speeding of V˙O2 kinetics is not intensity domain-specific or correlated with indices of exercise performance
Purpose This study examined the effect of 3 and 6 weeks of intensity domain-based exercise training on V˙O2 kinetics changes and their relationship with indices of performance. Methods Eighty-four young healthy participants (42 M, 42 F) were randomly …
High-Voltage Electrical Stimulation Can Restore Mitochondrial Capacity Following Denervation by Cauda Equina Injury
High-voltage functional electrical stimulation (HVFES) training of denervated, degenerated muscle (DDM) increases muscle mass and force output, regenerates muscle fibers and restores muscle ultrastructure. However, the effects of this training on the …
Muscle tissue oxygenation in individuals with peripheral arterial disease of different walking abilities: An exploratory study
Background: Blood flow restriction caused by peripheral arterial disease (PAD) is reflected in reduced walking capacity. The peripheral mechanisms that may affect the walking capacity of individuals with PAD are not yet fully understood. This study …
Near-Infrared Spectroscopy Allows for Monitoring of Bone Fracture Healing via Changes in Oxygenation
Bone fractures are associated with hypoxia, but no longitudinal studies of perfusion measurements in human patients have been reported despite the clinical and research potential. In this longitudinal observational cohort study, the near-infrared …
Boys vs men differences in muscular fatigue, muscle and cerebral oxygenation during maximal effort isometric contractions: the effect of muscle blood flow restriction
Purpose To examine whether the children’s superiority, over adults, to resist fatigue during repeated maximal-efforts depends on their often-cited oxidative advantage, attributed to greater muscle blood flow and O2-delivery. We also investigated the …
Muscle oxygenation, physical capacity, and quality of life in male heart failure patients
Objective: To verify peripheral muscle oxygenation and quality of life (QoL) in male patients with heart failure (HF) during a submaximal physical capacity test. Methods: Cross-sectional study, in individuals with HF, functional class II or III, left …
Time-continuous analysis of muscle and cerebral oxygenation during repeated treadmill sprints under heat stress: a statistical parametric mapping study
Purpose We examined how heat exposure affects muscle and cerebral oxygenation kinetics using statistical parametric mapping (SPM) during repeated treadmill sprints. Methods Eleven recreationally active males performed three sets of five 5-s sprints …
Acute impact of inorganic nitrate supplementation after ischemia and during small muscle mass exercise in postmenopausal females: A pilot study
Menopause is associated with reduced endothelial-dependent vasodilation and increased cardiovascular disease (CVD) risk. Dietary nitrate, a non-pharmacological approach, may increase vasodilatory capacity consequentially reducing CVD risk. We …