Publications using the PortaLite
Cryotherapy with carbon dioxide hydrate enhances immediate recovery of muscle function from neuromuscular fatigue
This study investigated the effect of cryotherapy with carbon dioxide hydrate (CDH) on fatigue recovery of neuromuscular function and muscle blood circulation. Fourteen young males randomly received three types of 20-min recovery interventions …
Functional Clustering of Systolic Blood Pressure and Frontal Brain Oxygenation During an Active Stand Test in The Irish Longitudinal Study on Ageing (TILDA): A Comparison of Tissue Saturation Index Versus Absolute Oxygenated Hemoglobin Concentration Approaches
Understanding the clinical implications of combined patterns of blood pressure and brain oxygenation dynamics during the transition from lying to standing remains limited. These dynamics can be investigated non-invasively in humans through a …
Lights on music cognition: A systematic and critical review of fNIRS applications and future perspectives
Research investigating the neural processes related to music perception and production constitutes a well-established field within the cognitive neurosciences. While most neuroimaging tools have limitations in studying the complexity of musical …
Menstrual cycle does not impact the hypoxic ventilatory response and acute mountain sickness prediction
The relationship between the variations in ovarian hormones (i.e., estrogens and progesterone) and the hypoxic ventilatory response (HVR) remains unclear. HVR is a key adaptive mechanism to high altitude and has been proposed as a predictor for acute …
Recognition of mild cognitive impairment in older adults using a polynomial regression model based on prefrontal cortex hemoglobin oxygenation
Aim This study employed a three-minute game-based intelligence test (GBIT) to create a hemoglobin polynomial regression model for early identification of mild cognitive impairment (MCI) in older adults. Methods 210 older adult participants were …
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 …
Efficient Mapping of Tissue Oxygen Saturation Using Hyperspectral Imaging and GAN
Oxygen saturation is a critical parameter widely used in clinical practice to assess the concentration of oxygen in the blood. Recently, hyperspectral imaging-based oximetry techniques have been proposed for broad applications of two-dimensional …
Hypoventilation training including maximal end-expiratory breath holding improves the ability to repeat high-intensity efforts in elite judo athletes
Purpose: To investigate the effects of a repeated-sprint training in hypoxia induced by voluntary hypoventilation at low lung volume (RSH-VHL) including end-expiratory breath holding (EEBH) of maximal duration. Methods: Over a 4-week period, twenty …
Impact of foam rolling with and without vibration on muscle oxidative metabolism and microvascular reactivity
Background and Purpose There is a growing interest in use vibration foam rolling as a warm up and recovery tool. However, whether vibration foam rolling offers additional benefits to traditional foam rolling is unclear. The current study aims to …
Investigating Skeletal Muscle Pump Function Using Thigh EMG, Thigh NIRS, And Stroke Volume Data In The FRAILMatics Physiological Cohort
Background: The pioneering female physiologist Frances Hellebrandt first highlighted the significance of the skeletal muscle pump in circulation in the 1930s. However, the mechanisms underlying the muscle pump's function remain elusive, particularly …
Effects of coffee intake on skeletal muscle microvascular reactivity at rest and oxygen extraction during exercise: a randomized cross-over trial
Purpose The effects of coffee ingestion on skeletal muscle microvascular function are not well understood. This study aimed to investigate the acute effects of coffee intake with varying levels of caffeine on skeletal muscle microvascular reactivity …
Daily Physical Activity Does Not Contribute to Differences in Muscle Oxidative Capacity Between Overweight and Obesity
Background: The interaction between physical activity, skeletal muscle health, and adiposity has been explored in normal weight and overweight/obesity grouped together; however, the overall risks associated with being overweight are less than those …
Effects of pre-term birth on the pattern of altitude acclimatisation at rest and during moderate-intensity exercise across three days at 3375 m
Pre-term birth elicits long-lasting physiological effects in various organ systems, potentially modulating exercise- and environmental-stress responses. To establish whether adult survivors of pre-term birth respond uniquely to sub-acute …
Muscle oxygenation and pain in different types of temporomandibular disorders
Objectives Studies exploring variations in peripheral muscle oxygenation and pressure pain thresholds (PPT) of masticatory muscles in individuals with Temporomandibular Disorders (TMDs) are limited. The purpose of this study was to compare variations …
Transcranial Direct Current Stimulation May Reduce Prefrontal Recruitment During Dual Task Walking in Functionally Limited Older Adults – A Pilot Study
Transcranial direct current stimulation (tDCS) targeting the left dorsolateral prefrontal cortex (dlPFC) improves dual task walking in older adults, when tested just after stimulation. The acute effects of tDCS on the cortical physiology of walking, …
Home-based monitoring of cerebral oxygenation in response to postural changes using near-infrared spectroscopy
Orthostatic hypotension (OH) is prevalent in older adults and can cause falls and hospitalization. Diagnostic intermittent blood pressure (BP) measurements are only a proxy for cerebral perfusion and do not reflect daily-life BP fluctuations. …
Prefrontal cortex oxygenation during a mentally fatiguing task in normoxia and hypoxia
Mental fatigue (MF) and hypoxia impair cognitive performance through changes in brain hemodynamics. We want to elucidate the role of prefrontal cortex (PFC)-oxygenation in MF. Twelve participants (22.9 ± 3.5 years) completed four experimental trials, …
Impact of acute hypoxic exposure on neuromuscular and hemodynamic responses during step intensity dynamic constant external resistance leg extension exercise
Objectives This study examined the effects of acute normoxic and hypoxic exposure on neuromuscular and hemodynamic physiological responses performed during dynamic step muscle actions. Methods Thirteen recreationally active men (mean ± SD age: 21.2 …
A single exposure to 100% normo-baric oxygen therapy appears to improve sequence learning processes by increasing prefrontal cortex oxygen saturation
Previously, we showed that a normo-baric 100 % oxygen treatment (NbOxTr) enhances motor learning processes, e.g., visuomotor adaptation (VMA) and sequence learning (SL). However, this work was limited to behavioral outcomes and did not identify the …
Assessment of Microvascular Hemodynamic Adaptations in Finger Flexors of Climbers
Climbing performance is greatly dependent on the endurance of the finger flexors which, in turn, depends on the ability to deliver and use oxygen within the muscle. Near-infrared spectroscopy (NIRS) and diffuse correlation spectroscopy (DCS) have …