PortaMon

The gold-standard research device for the measurement of muscle oxygenation


Publications using the PortaMon

A 30-Min Rest Protocol Does Not Affect W′, Critical Power, and Systemic Response

PURPOSE: This study aimed to assess and compare the systemic response of oxygen uptake kinetics and muscle deoxygenation between a 30-min rest protocol and a multivisit protocol on the parameters of the power-duration relationship (i.e., critical …

Acute effects of leg heat therapy on walking performance and cardiovascular and inflammatory responses to exercise in patients with peripheral artery disease

Lower-extremity peripheral artery disease (PAD) is associated with increased risk of cardiovascular events and impaired exercise tolerance. We have previously reported that leg heat therapy (HT) applied using liquid-circulating trousers perfused with …

The acute physiological and perceptual effects of recovery interval intensity during cycling-based high-intensity interval training

Purpose: The current study sought to investigate the role of recovery intensity on the physiological and perceptual responses during cycling-based aerobic high-intensity interval training. Methods: Fourteen well-trained cyclists (V˙ O 2peak: 62 ± 9 …

The effect of dietary nitrate on exercise capacity in chronic kidney disease: a randomized controlled pilot study

Background: Chronic Kidney Disease (CKD) patients exhibit a reduced exercise capacity that impacts quality of life. Dietary nitrate supplementation has been shown to have favorable effects on exercise capacity in disease populations by reducing the …

High-intensity interval exercise in the cold regulates acute and postprandial metabolism

High-Intensity Interval Exercise (HIIE) has been shown to be more effective than moderate-intensity exercise for increasing acute lipid oxidation and lowering blood lipids during exercise and postprandially. Exercise in cold environments is also …

Acute effect of inspiratory resistive loading on sprint interval exercise performance in team-sport athletes

This study examined acute effects of inspiratory resistive loading (IRL) during rest intervals on sprint interval exercise (SIE) performance. In a randomized crossover design, nine collegiate basketball players performed IRL (15 cmH2O) or passive …

History-dependence of muscle excitation and oxygenation during isometric knee extension force production

PURPOSE: This study examined the issue of history-dependence on muscle excitation and oxygenation by using surface electromyography (EMG) and near-infrared spectroscopy (NIRS). METHODS: Eight male participants performed isometric knee extension force …

Muscle Oxygen Delivery in the Forearm and in the Vastus Lateralis Muscles in Response to Resistance Exercise: A Comparison Between Nepalese Porters and Italian Trekkers

Altitude ascending represents an intriguing experimental model reproducing physiological and pathophysiological conditions sharing hypoxemia as the denominator. The aim of the present study was to investigate fractional oxygen extraction and blood …

Effect of dark chocolate supplementation on tissue oxygenation, metabolism, and performance in trained cyclists at altitude

Dark chocolate (DC) is high in flavonoids and has been shown to increase nitric oxide in the blood. Increased nitric oxide has the potential to improve delivery of oxygen to muscle, especially in hypoxic conditions, such as altitude. Our aim was to …

Acute effect of myofascial reorganization of the trapezius muscle in peripheral muscle oxygenation in asympomatic subjects – a case series

Background: Myofascial Reorganization (MFR) is a physiotherapy technique that mixes myofascial pressures and slips and has been used as a simple and non-invasive method that readjusts soft tissues, as well as myofascial adhesions and contractures …

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 …