PortaMon
The gold-standard research device for the measurement of muscle oxygenation
Publications using the PortaMon
The effect of running versus cycling high-intensity intermittent exercise on local tissue oxygenation and perceived enjoyment in 18-30-year-old sedentary men
Background: High-intensity interval training (HIIT) has been proposed as a time-efficient exercise format to improve exercise adherence, thereby targeting the chronic disease burden associated with sedentary behaviour. Exercise mode (cycling, …
Enhanced local skeletal muscle oxidative capacity and microvascular blood flow following 7-day ischemic preconditioning in healthy humans
Ischemic preconditioning (IPC), which involves intermittent periods of ischemia followed by reperfusion, is an effective clinical intervention that reduces the risk of myocardial injury and confers ischemic tolerance to skeletal muscle. Repeated …
Strength training improves double-poling performance after prolonged submaximal exercise in cross-country skiers
The purpose of this study was to investigate the effects of adding strength training with or without vibration to cross-country (XC) skiers' endurance training on double-poling (DP) performance, physiological, and kinematic adaptations. Twenty-one …
An Investigation into the Effect of Skeletal Muscle Metabolic Function & Cardio-Respiratory Fitness on Exercise Capacity in the Presence and Absence of Disease
It is uncommon for cardio-respiratory fitness and skeletal muscle metabolic function to be assessed independently within an exercise test. Exercise capacity may require adaptation of one or other of these systems to a greater or lesser extent and the …
Critical determinants of combined sprint and endurance performance: An integrative analysis from muscle fiber to the human body
Optimizing physical performance is a major goal in current physiology. However, basic understanding of combining high sprint and endurance performance is currently lacking. This study identifies critical determinants of combined sprint and endurance …
Does postexercise modelled capillary blood flow accurately reflect cardiovascular effects by different exercise intensities?
Blood flow (BF) in exercising muscles is an important factor for exercise capacity. Recently, a non-invasive method to estimate capillary BF (Qcap) was introduced. Using this method, the Fick principle is re-arranged by using relative differences in …
Effects of resting, consecutive, long-duration water immersions on neuromuscular endurance in well-trained males
Purpose: This study examined the effects of repeated long-duration water immersions (WI)s at 1.35 atmospheres absolute (ATA) on neuromuscular endurance performance. We hypothesized that, following 5 days of consecutive, resting, long-duration WIs, …
Near-Infrared Spectroscopy Is Promising to Detect Iliac Artery Flow Limitations in Athletes: A Pilot Study
Endurance cyclists have a substantial risk to develop flow limitations in the iliac arteries during their career. These flow limitations are due to extreme hemodynamic stress which may result in functional arterial kinking and/or intravascular …
Number of raised steps: A tool to assess brief and intense effort involving anaerobic metabolism
Background: Although the initial anaerobic component of exercise adaptation is unavoidable, no specific functional test is available for use in routine non-sporting practice to evaluate it. Objective: To assess the bioenergetic and biomechanical …
Respiratory and Muscle Oxygenation Responses to Two Constant-Load Exercise Intensities
Objective: We investigated the respiratory and vastus lateralis oxygenation responses to exhaustive, constant-load cycling at two exercise intensities. Methods: Eight moderately-trained male randomly cycled to exhaustion at 75% and 85% of maximal …
Yoga AIDS blood pressure recovery after exposure of forehead to cold: A pilot study
Context • Hypotension that occurs after a single bout of aerobic exercise also attenuates the vascular response to discrete stressors, an effect that can last for hours. It is unknown whether the hypotensive benefits of traditional exercise extend to …
Acute effects of repeated cycling sprints in hypoxia induced by voluntary hypoventilation
Purpose: This study aimed to investigate the acute responses to repeated-sprint exercise (RSE) in hypoxia induced by voluntary hypoventilation at low lung volume (VHL). Methods: Nine well-trained subjects performed two sets of eight 6-s sprints on a …
Effects of a pre-workout supplement on hyperemia following leg extension resistance exercise to failure with different resistance loads
Background: We sought to determine if a pre-workout supplement (PWS), containing multiple ingredients thought to enhance blood flow, increases hyperemia associated with resistance training compared to placebo (PBO). Given the potential interaction …
Ingestion of oxygenated water enhances lactate clearance kinetics in trained runners
Background: Drinks with higher dissolved oxygen concentrations have in recent times gained popularity as a potential ergogenic aid, despite a lack of evidence regarding their efficacy. The aim of this study was to assess effects of ingestion of an …
Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch
After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. …
Pulmonary oxygen uptake and muscle deoxygenation kinetics during heavy intensity cycling exercise in patients with emphysema and idiopathic pulmonary fibrosis
Background: Little is known about the mechanistic basis for the exercise intolerance characteristic of patients with respiratory disease; a lack of clearly defined, distinct patient groups limits interpretation of many studies. The purpose of this …
Elite sprint swimming performance is enhanced by completion of additional warm-up activities
This study investigated the effect of completing additional warm-up strategies in the transition phase between the pool warm up and the start of a race on elite sprint swimming performance. Twenty-five elite swimmers (12 men, 20 ± 3 years; 13 women, …
End-exercise $Δ$HHb/$Δ$VO2 and post-exercise local oxygen availability in relation to exercise intensity
Increased local blood supply is thought to be one of the mechanisms underlying oxidative adaptations to interval training regimes. The relationship of exercise intensity with local blood supply and oxygen availability has not been sufficiently …
Towards NIRS-based hand movement recognition
This work reports on preliminary results about on hand movement recognition with Near InfraRed Spectroscopy (NIRS) and surface ElectroMyoGraphy (sEMG). Either basing on physical contact (touchscreens, data-gloves, etc.), vision techniques (Microsoft …