PortaMon
The gold-standard research device for the measurement of muscle oxygenation
Publications using the PortaMon
Number of raised steps: A tool to assess brief and intense effort involving anaerobic metabolism
Background: Although the initial anaerobic component of exercise adaptation is unavoidable, no specific functional test is available for use in routine non-sporting practice to evaluate it. Objective: To assess the bioenergetic and biomechanical …
Respiratory and Muscle Oxygenation Responses to Two Constant-Load Exercise Intensities
Objective: We investigated the respiratory and vastus lateralis oxygenation responses to exhaustive, constant-load cycling at two exercise intensities. Methods: Eight moderately-trained male randomly cycled to exhaustion at 75% and 85% of maximal …
Yoga AIDS blood pressure recovery after exposure of forehead to cold: A pilot study
Context • Hypotension that occurs after a single bout of aerobic exercise also attenuates the vascular response to discrete stressors, an effect that can last for hours. It is unknown whether the hypotensive benefits of traditional exercise extend to …
Acute effects of repeated cycling sprints in hypoxia induced by voluntary hypoventilation
Purpose: This study aimed to investigate the acute responses to repeated-sprint exercise (RSE) in hypoxia induced by voluntary hypoventilation at low lung volume (VHL). Methods: Nine well-trained subjects performed two sets of eight 6-s sprints on a …
Effects of a pre-workout supplement on hyperemia following leg extension resistance exercise to failure with different resistance loads
Background: We sought to determine if a pre-workout supplement (PWS), containing multiple ingredients thought to enhance blood flow, increases hyperemia associated with resistance training compared to placebo (PBO). Given the potential interaction …
Ingestion of oxygenated water enhances lactate clearance kinetics in trained runners
Background: Drinks with higher dissolved oxygen concentrations have in recent times gained popularity as a potential ergogenic aid, despite a lack of evidence regarding their efficacy. The aim of this study was to assess effects of ingestion of an …
Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. …
Pulmonary oxygen uptake and muscle deoxygenation kinetics during heavy intensity cycling exercise in patients with emphysema and idiopathic pulmonary fibrosis
Background: Little is known about the mechanistic basis for the exercise intolerance characteristic of patients with respiratory disease; a lack of clearly defined, distinct patient groups limits interpretation of many studies. The purpose of this …
Elite sprint swimming performance is enhanced by completion of additional warm-up activities
This study investigated the effect of completing additional warm-up strategies in the transition phase between the pool warm up and the start of a race on elite sprint swimming performance. Twenty-five elite swimmers (12 men, 20 ± 3 years; 13 women, …
End-exercise $Δ$HHb/$Δ$VO2 and post-exercise local oxygen availability in relation to exercise intensity
Increased local blood supply is thought to be one of the mechanisms underlying oxidative adaptations to interval training regimes. The relationship of exercise intensity with local blood supply and oxygen availability has not been sufficiently …
Towards NIRS-based hand movement recognition
This work reports on preliminary results about on hand movement recognition with Near InfraRed Spectroscopy (NIRS) and surface ElectroMyoGraphy (sEMG). Either basing on physical contact (touchscreens, data-gloves, etc.), vision techniques (Microsoft …
Effects of dietary nitrate supplementation on physiological responses, cognitive function, and exercise performance at moderate and very-high simulated altitude
Purpose: Nitric oxide (NO) bioavailability is reduced during acute altitude exposure, contributing toward the decline in physiological and cognitive function in this environment. This study evaluated the effects of nitrate (NO3-) supplementation on …
Investigation on acute effects of enzyme replacement therapy and influence of clinical severity on physiological variables related to exercise tolerance in patients with late onset Pompe disease
Exercise intolerance is one of the clinical hallmarks of late-onset Pompe disease (LOPD). We studied the acute effects of ERT on the physiological variables associated with exercise tolerance in patients chronically ERT treated. Moreover, we assessed …
Oxygen delivery is not a limiting factor during post-exercise recovery in healthy young adults
Purpose It is still equivocal whether oxygen uptake recovery kinetics are limited by oxygen delivery and can be improved by supplementary oxygen. The present study aimed to investigate whether measurements of muscle and pulmonary oxygen uptake …
Patients with myogenic temporomandibular disorders have reduced oxygen extraction in the masseter muscle
Objective: The objective of the present study is to investigate if changes in the oxygen saturation of masseter muscle during a chewing task can differentiate patients with myogenic temporomandibular disorders (TMD) from healthy subjects and if these …
Vibration-related extrusion of capillary blood from the calf musculature depends upon directions of vibration of the leg and of the gravity vector
Purpose: In this study, we investigated the effects of vibration of the whole lower leg on the content and the oxygenation of hemoglobin in the unloaded relaxed lateral gastrocnemius muscle. Vibration was applied orthogonal to and in parallel with …
Prediction of oxygen uptake dynamics by machine learning analysis of wearable sensors during activities of daily living
Currently, oxygen uptake (VO2) is the most precise means of investigating aerobic fitness and level of physical activity; however, VO2 can only be directly measured in supervised conditions. With the advancement of new wearable sensor technologies …
Ratings of Perceived Exertion and Physiological Parameters of Muscle Metabolism in Postmenopausal Women: A Comparison Between Water- and Land-Based Exercise
We compared responses from postmenopausal women living a sedentary lifestyle (n = 15; Mean age= 59; SD = 4.2) to a single bout of water- or land-based exercise with respect to ratings of perceived exertion (RPE), lactate concentration, and muscle …
The influence of adipose tissue on spatially resolved near-infrared spectroscopy derived skeletal muscle oxygenation: The extent of the problem
Objective. Near-infrared spectroscopy (NIRS) measurements of tissue oxygen saturation (StO2) are useful for the assessment of skeletal muscle perfusion and function during exercise, however, they are influenced by overlying skin and adipose tissue. …
Age differences in physiological responses to self-paced and incremental V˙ O 2 max testing
Purpose: A self-paced maximal exercise protocol has demonstrated higher V˙ O 2 max values when compared against traditional tests. The aim was to compare physiological responses to this self-paced V˙ O 2 max protocol (SPV) in comparison to a …