Publications using the PortaLite
Evaluating the Intensity of Muscle Contraction by Near‐Infrared Spectroscopy, a Potential Application for Scaling Muscle Spasm
Muscle spasticity, common in conditions such as cerebral palsy, spinal cord injury, and multiple sclerosis, is traditionally assessed using the Modified Ashworth Scale, which lacks consistency. This study evaluates near‐infrared spectroscopy (NIRS) …
Muscle deoxygenation responses are similar between repeated sprints in hypoxia performed with uni‐ versus bi‐lateral knee extensions but reduced compared to cycling
The aim of this study was to assess the effects of oxygen availability (normoxia vs. hypoxia), muscle mass and exercise type on pulse oxygen saturation, and quadriceps muscle oxygenation during repeated sprint exercises. Sixteen healthy participants …
Preoperative physical resilience indicators and their associations with postoperative outcomes
The health benefit of surgery in older adults may be outweighed by negative effects on cognitive or physical function. Physical resilience is defined as the potential for recovery after a stressor such as surgery. We assessed associations between …
Methodology to establish non-invasive synchronous heart rate and heart rate variability measurement during uroflowmetry
Heart rate (HR) and heart rate variability (HRV) are established measures related to cardiovascular disease (CVD), a known risk factor correlated with lower urinary tract symptoms (LUTS) and overactive bladder (OAB). However, no standardized …
A Muscle Physiology-Based Framework for Quantifying Training Load in Resistance Exercises
Background: Objective training load (TL) indexes used in resistance training lack physiological significance. This study was aimed to provide a muscle physiology-based approach for quantifying TL in resistance exercises (REs). Methods: Following …
Acute effects of isolated and combined dietary nitrate and caffeine ingestion on ergometer-based 1000 m time trial performance in highly trained kayakers
Dietary nitrate (BR) and caffeine (CAF) ingestion have been shown to increase sports performance. However, the isolated and combined effects of BR and CAF ingestion on time trial (TT) performance as well as the accompanying physiological and …
Central and peripheral nervous system activity and muscle oxygenation in athletes during repeated-sprint exercise in normoxia and normobaric hypoxia
Aim To investigate central and peripheral nervous system activity and muscle oxygenation in athletes during repeated-sprint exercise in normoxia and normobaric hypoxia. Methods The effects on vastus lateralis muscle strength in a cross-over study …
Relationship between overall right pre-frontal cortex activity and learning and retention of a visuomotor adaptation task: a continuous analysis
Learning a visuomotor adaptation task (VMA) is typically assessed by describing the behavioral changes during adaption (early-fast and late-slow phases) and retention (consolidation) tests. Few studies have concurrently examined behavioral and brain …
Sex-Based Effects on Muscle Oxygenation During Repeated Maximal Intermittent Handgrip Exercise
Background: This investigation aimed to examine sex-based differences in deoxy[heme] (HHb), tissue saturation (StO2), and force-deoxygenation ratio (FD) of the forearm flexor muscles during a maximal-effort intermittent fatiguing handgrip protocol. …
Tissue oxygenation in response to low-load and high-load back squats with continuous blood flow restriction in athletes
To determine muscle oxygenation with continuous blood flow restriction (BFR) training in high load (HL), 80% one-repetition maximum (1RM) and low load (LL), 30% 1RM squat exercises. In week-2 of a 4-week resistance training programme as part of their …
Ketone monoester ingestion improves cardiac function in adults with type 2 diabetes: a double-blind, placebo controlled, randomised, crossover trial
Type 2 diabetes (T2D) is a metabolic disease associated with cardiovascular dysfunction. The myocardium preferentially uses ketones over free fatty acids as a more energy efficient substrate. The primary aim was to assess the effects of ketone …
Single-centre, double-blinded, randomised placebo-controlled trial to determine the effect of a 12-week home-based programme of footplate neuromuscular electrical stimulation on walking capacity in people with peripheral artery disease: a protocol for the Foot-PAD trial
Introduction Patients with peripheral artery disease (PAD) can experience intermittent claudication, which limits walking capacity and the ability to undertake daily activities. While exercise therapy is an established way to improve walking capacity …
Accuracy deficits during robotic time-constrained reaching are related to altered prefrontal cortex activity in children with cerebral palsy
Background The prefrontal cortex (PFC) is an important node for action planning in the frontoparietal reaching network but its role in reaching in children with cerebral palsy (CP) is unexplored. This case–control study combines a robotic task with …
Acute sport-related concussion alters cardiac contribution to cerebral oxygenation during repeated squat stands
Assessment of cerebral oxygenation during repeated squat stands following an acute sport-related concussion (SRC) has the potential to identify physiological changes following SRC. All varsity university athletes completed a pre-season assessment and …
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 …
IMPACT OF NOCTURNAL OXYGEN ENRICHMENT ON HIGH-ALTITUDE ACCLIMATIZATION
Nocturnal oxygen enrichment improves sleep at high-altitude but may impair acclimatization. PURPOSE: Determine if nocturnal oxygen enrichment impacts acclimatization. METHODS: A 7-day acclimatization protocol occurred at a field-based research site …
Investigating the interplay between cognitive workload and situation awareness during full driving automation
This study investigates concurrent changes in cognitive workload and situation awareness during the use of full driving automation. Research shows that automation use has a negative effect on situation awareness. Driving studies posit a decline in …
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 …