Publications using the PortaLite
Blood flow restriction induces similar peripheral stress but greater central drive impairments than systemic hypoxia during repeated cycling sprints
Purpose Systemic hypoxia (SH) and blood flow restriction (BFR) are methods used to improve repeated sprint exercise ability. This study aimed to compare their respective impacts on neuromuscular fatigue etiology of the lower limbs during cycling …
Effect of repeated hot water immersion on cognitive performance, cerebrovascular function, sleep and biomarkers of neurodegeneration in older adults
Ageing is associated with cognitive decline and increased risk of developing neurodegenerative disease. Repeated passive heating, using hot water immersion (HWI), may improve cognitive performance via improved cerebral oxygenation, but this is yet to …
Impaired peripheral oxygen delivery during submaximal exercise in adults with long textlessspan style="font-variant:small-caps;"textgreaterCOVIDtextless/spantextgreater
Long COVID (LC) is a multisystem condition that is linked to distinct pathologies including viral persistence, immunological dysfunction, endothelial damage, and mitochondrial dysfunction. To date, limited research has assessed peripheral tissue …
Orthostatic hypotension without co-existent supine hypertension is associated with impaired cerebral oxygenation: findings from the Irish Longitudinal Study on Ageing (TILDA)
Hypertension and orthostatic hypotension (OH) are common in older age, with both conditions recognized as risk factors for cardiovascular disease and end organ damage. Cerebral hypoperfusion is postulated to play a role in these adverse effects. For …
Physiological responses of individuals with idiopathic chilblains during cold exposure and rewarming: a nonrandomized clinical trial
Idiopathic chilblains (IC) is a localized inflammatory disorder affecting acral areas, with unclear pathophysiology and pathogenesis. This study aimed to investigate the vasomotor, autonomic, and inflammatory responses of adults with (HIC þ ) and …
Sex Differences in Torque and Oxygenation Responses During Maximal Repeated Dynamic Unilateral Leg Extension Muscle Actions
Sex differences in performance fatigability (PF) are task- and intensity-dependent, as variations in neuromuscular and vascular function modulate the ability to sustain torque output. However, few studies have examined differences in the onset of …
Menstrual cycle influences skeletal muscle oxygenation during high-intensity interval training: a work to rest evaluation
Introduction: The menstrual cycle (MC), characterized by hormonal fluctuations, may impact skeletal muscle oxygenation (SMO) during high-intensity interval training (HIIT). SMO measured around HIIT in eumenorrheic (EUM) or hormonal contraceptive (HC) …
Bioceramic arm garment does not increase diameter of brachial artery and blood flow—Compliance and biceps microcirculation in male recreational sports practitioners at rest: A single blinded randomized cross over study
Background Interest in clothing that reflects far infrared (FIR) radiation naturally emitted by the body during and after exercise has increased based on the assumption that this can increase arterial and venous blood flow. Indeed, in vitro and …
Cerebral oxygenation and cognitive performance under different acute normobaric hypoxic conditions: a fNIRS study
This study investigates the effects of different levels of acute normobaric hypoxia on cognitive function and cerebral oxygenation in healthy young adults.
Effect of Dietary Nitrate Intake on Fatigue Resistance Following Ischemia-Induced Microvascular Dysfunction in Males and Females
Background Skeletal muscle fatigue reflects the interaction of metabolic demand, contractile efficiency, and oxygen delivery, processes highly dependent on microvascular function. Prolonged ischemia induces transient microvascular dysfunction that …
Impact of the menstrual cycle phase on microvascular function at high altitude
Ovarian hormones may modulate key physiological functions that play a crucial role in the acute response to hypoxia. Women remain underrepresented in high-altitude physiology research. This exploratory study aimed to investigate the impact of …
Ischemic Preconditioning Does Not Improve Climbing Specific Performance in Elite Athletes
Platzer, H-P, Köck, A, Schobersberger, W, and Dünnwald, T. Ischemic preconditioning does not improve climbing specific performance in elite athletes. J Strength Cond Res 40(1): e69–e75, 2026—The aim of the present investigation was to analyze the …
Low-Load Blood Flow Restriction Training Enhances Brachial Blood Flow During Exercise but not Reactive Hyperemia in Experienced Climbers
Low-load blood flow restriction training (LLBFRT) induces significant vascular stress, which is often associated with vascular remodeling, increased capillarization and muscle blood flow. These adaptations may be of interest to climbers as their …
Muscle oxidative capacity does not appear to influence NIRS-VOT outcomes in healthy adults
Near-infrared spectroscopy (NIRS) with vascular occlusion testing (VOT) is used to assess skeletal muscle tissue oxygenation (StO2) responses. Differences in NIRS-VOT outcomes exist between trained and untrained groups; however, it is unclear whether …
Submaximal running with blood flow restriction induces similar muscle oxygenation responses relative to maximal unrestricted running
Purpose To examine muscle oxygenation during running with and without blood flow restriction (BFR). Methods Fifteen aerobically trained males randomly completed four, three-minute running bouts at 70%BFR, 80%BFR, and 90%BFR of their top speed with …
Influence of the combination of end-expiratory breath hold training and inspiratory muscle training on performance in artistic swimmers.
This study explored the effects of combining repeated-sprint training with end-expiratory breath-hold (EBH) and inspiratory muscle training (IMT) on cardiorespiratory fitness and performance in artistic swimming. In a quasi-experimental study, …
Relationships between cognitive appraisals of threat and challenge, psychophysiological responses, and clinical performance during high-stress simulated osces
Introduction In healthcare education, Objective Structured Clinical Examinations (OSCEs) are often utilised as a practical assessment tool and can cause marked elevations in psychophysiological stress levels for students. Cognitive Appraisal Theory …
Affective and cerebral haemodynamic responses to audiovisual stimuli during exercise above and below the ventilatory threshold
Audiovisual stimuli during exercise can improve affective and perceptual responses; however, the factors moderating this benefit as well as the associated cerebral haemodynamic responses remain largely unexplored. Accordingly, the present work …
Cold Water Immersion: Simultaneous Assessment of Cerebral Oxygenation, Vascular Function, and Thermoregulatory Responses
Introduction Developing a greater understanding of how the body reacts following cold water immersion (CWI) and its impact on human performance is required for the development of future monitoring technologies and countermeasures to reduce …
Synthetic-data-driven LSTM framework for tracing cardiac pulsation in optical signals
Optical monitoring of cardiac pulsations using near-infrared spectroscopy (NIRS), photoplethysmography (PPG), and diffuse correlation spectroscopy (DCS) is often hindered by motion artifacts and noise. We introduce a synthetic-data-driven framework …