Peripheral impairments of oxidative metabolism after a 10-day bed rest are upstream of mitochondrial respiration

In order to identify peripheral biomarkers of impaired oxidative metabolism during exercise following a 10-day bed rest, 10 males performed an incremental exercise (to determine peak pulmonary V˙O 2 (V˙O 2 p)) and moderate-intensity exercises, before …

Acute L-Citrulline Supplementation Increases Nitric Oxide Bioavailability but Not Inspiratory Muscle Oxygenation and Respiratory Performance

The present study aimed to investigate whether acute L-citrulline supplementation would affect inspiratory muscle oxygenation and respiratory performance. Twelve healthy males received 6 g of L-citrulline or placebo in a double-blind crossover …

Peripheral impairments of oxidative metabolism after a 10-day bed rest are upstream of mitochondrial respiration

In order to identify peripheral biomarkers of impaired oxidative metabolism during exercise following a 10-day bed rest, 10 males performed an incremental exercise (to determine peak pulmonary V˙O 2 (V˙O 2 p)) and moderate-intensity exercises, before …

Effects of NMES pulse width and intensity on muscle mechanical output and oxygen extraction in able-bodied and paraplegic individuals

Purpose: Neuromuscular Electrical Stimulation (NMES) is commonly used in neuromuscular rehabilitation protocols, and its parameters selection substantially affects the characteristics of muscle activation. Here, we investigated the effects of short …

Cerebral oxygenation responses to head movement measured with near-infrared spectroscopy

Motion is disruptive to neuroimaging methods. Motion artefacts range from large amplitude and short frequency spikes to drifts in amplitude causing cofounds in the analysis or completely invalidating any analysis, leading to epoch exclusion of data. …

Acute effect of moderate-intensity aerobic exercise on cerebral blood flow and cognitive function in young adults: Treadmill vs. cycle ergometer

PURPOSE: This study aimed to compare the acute effects of different types (treadmill vs. cycle) of moderate-intensity aerobic exercise on cerebral blood flow and cognitive function in young adults. METHODS: By a randomized crossover study design, ten …

Age and sex differences in frontal lobe cerebral oxygenation in older adults—Normative values using novel, scalable technology: Findings from the Irish Longitudinal Study on Ageing (TILDA)

Aims: Near-infrared spectroscopy (NIRS) is a non-invasive, easy to apply, optical technology for measuring cerebral blood oxygenation, but there is lack of comprehensive population data to aid interpretation and clinical use. Given the importance of …

Associations between Neurocardiovascular Signal Entropy and Physical Frailty

In this cross-sectional study, the relationship between noninvasively measured neurocardiovascular signal entropy and physical frailty was explored in a sample of community-dwelling older adults from The Irish Longitudinal Study on Ageing (TILDA). …

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, …

Fat Oxidation Kinetics Is Related to Muscle Deoxygenation Kinetics During Exercise

Purpose: The present study aimed to determine whether whole-body fat oxidation and muscle deoxygenation kinetics parameters during exercise were related in individuals with different aerobic fitness levels. Methods: Eleven cyclists [peak oxygen …

Photobiomodulation effect on local hemoglobin concentration assessed by near-infrared spectroscopy in humans

Exposure of biological tissue to photobiomodulation therapy (PBMT) seems to increase the oxygen availability and mitochondrial electrochemical activity. With the advancement of new technologies, such as near-infrared spectroscopy (NIRS), information …

Rolling massage acutely improves skeletal muscle oxygenation and parameters associated with microvascular reactivity: The first evidence-based study

Although it has been claimed that rolling massage (RM), may lead to improvements in skeletal muscle oxygenation, metabolism, blood flow, and vascular function, scientific evidence has not yet been provided. Thus, the current study investigated the …

Similar recovery of maximal cycling performance after ischemic preconditioning, neuromuscular electrical stimulation or active recovery in endurance athletes

This study investigated the efficacy of ischemic preconditioning (IPC) on the recovery of maximal aerobic performance and physiological responses compared with commonly used techniques. Nine endurance athletes performed two 5-km cycling time trials …

The impact of beetroot juice intake on muscle oxygenation and performance during rhythmic handgrip exercise

Background: Despite studies investigating the effect of beetroot juice (BJ) ingestion on exercise performance in several modes of exercise, it is important to evaluate how untrained subjects respond to BJ intake during fatiguing resistance exercise. …

Cerebral and Muscle Oxygenation during Repeated Shuttle Run Sprints with Hypoventilation

Ten highly-trained Jiu-Jitsu fighters performed 2 repeated-sprint sessions, each including 2 sets of 8 x $∼$6 s back-and-forth running sprints on a tatami. One session was carried out with normal breathing (RSN) and the other with voluntary …

In vivo assessment of muscle mitochondrial function in healthy, young males in relation to parameters of aerobic fitness

Purpose: The recovery of muscle oxygen consumption (mV˙ O2) after exercise provides a measure of skeletal muscle mitochondrial capacity, as more and better-functioning mitochondria will be able to restore mV˙ O2 faster to the pre-exercise state. The …

Oxygen availability in respiratory muscles during exercise in children following fontan operation

Introduction: As survival of previously considered as lethal congenital heart disease forms is the case in our days, issues regarding quality of life including sport and daily activities emerge. In patients with Fontan circulation, there is no pump …

Skeletal muscle oxygenation during cycling at different power output and cadence

The selection of cadence during cycling may be determined by a number of factors, including the degree of oxygenation in the exercising skeletal muscle. The purpose of this study was to determine the degree of muscle oxygenation associated with …

Sprint interval exercise versus continuous moderate intensity exercise: Acute effects on tissue oxygenation, blood pressure and enjoyment in 18-30 year old inactive men

Background: Sprint interval training (SIT) can be as effective, or more effective, than continuous moderate intensity exercise (CMIE) for improving a primary risk factor for cardiometabolic disease, low cardiorespiratory fitness (CRF). However, there …

Lower limb sports compression garments improve muscle blood flow and exercise performance during repeated-sprint cycling

Purpose: Evidence supporting the use of lower-limb compression garments during repeated-sprint exercise (RSE) with short rest periods, where performance will rely heavily on aerobic metabolism, is lacking. Methods: A total of 20 recreationally active …