Lutz SchegaOtto-von-Guericke-Universität Magdeburg | OvGU · Institute of Sport Science (ISPW)
Lutz Schega
PhD, Prof. (Full)
About
131
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Introduction
Additional affiliations
June 2015 - August 2015
January 2012 - March 2012
March 2003 - October 2004
Publications
Publications (131)
Background
Hypoxia and hyperoxia can affect the acute psycho-physiological response to exercise. Recording various perceptual responses to exercise is of particular importance for investigating behavioral changes to physical activity, given that the perception of exercise-induced pain, discomfort or unpleasure, and a low level of exercise enjoyment...
This study investigated gaze behavior during visuo-cognitive-motor tasks with a change of movement direction in glaucoma patients and healthy controls. Nineteen glaucoma patients (10 females, 9 males) and 30 healthy sighted controls (17 females, 13 males) participated in this cross-sectional study. Participants performed two visuo-cognitive-motor t...
Physical exercise induces acute psychophysiological responses leading to chronic adaptations when the exercise stimulus is applied repeatedly, at sufficient time periods, and with appropriate magnitude. To maximize long-term training adaptations, it is crucial to control and manipulate the external load and the resulting psychophysiological strain....
The health benefits of regular physical activity (PA) in youth are well-documented. Yet the adherence rate to PA guidelines among youth worldwide is alarmingly deficient with only 19% of youth worldwide adhering to the World Health Organization guidelines. This is reflective of a global proliferation of a physical inactivity pandemic among youth. T...
Brain-derived neurotrophic factor (BDNF) is a crucial mediator of neuronal plasticity. Here, we investigated the effects of controlled normobaric hypoxia (NH) combined with physical inactivity on BDNF blood levels and executive functions. A total of 25 healthy adults (25.8 ± 3.3 years, 15 female) were analyzed in a randomized controlled cross-over...
: Background: Brain-derived neurotrophic factor (BDNF) is a crucial mediator of neuronal plasticity. Here, we investigated the effects of controlled normobaric hypoxia (NH) combined with physical inactivity on BDNF blood levels and executive functions. Methods: Twenty-five healthy adults (25.8±3.3 years, 15 female) were analyzed in a randomized, co...
Aims
Impaired vision is an additional risk factor in elderly for falls. We investigated the hypothesis that treadmill (TM) walking affects visual function in both healthy elderly and those with early-moderate visual dysfunction due to glaucoma.
Methods
Thirty healthy controls (HC) aged 64–83 years and 18 glaucoma patients (GLA) aged 62–82 years pa...
In the recent past, practical blood flow restriction (pBFR) using non-pneumatic, usually elastic cuffs has been established as a cost-effective alternative to traditional blood flow restriction (BFR) using pneumatic cuffs, especially for training in large groups. This study investigated whether low-load resistance exercise with perceptually primed...
Background
Animal and human studies have shown that exposure to hypoxia can increase brain-derived neurotrophic factor (BDNF) protein transcription and reduce systematic inflammatory cytokine response. Therefore, the aim of this study was to investigate the acute and chronic effects of intermittent hypoxic-hyperoxic exposure (IHHE) prior to aerobic...
Hypoxia and hyperoxia can affect the acute psycho-physiological response to exercise. Recording various perceptual responses to exercise is of particular importance for investigating behavioural changes to physical activity towards health, given that the perception of exercise-induced pain, discomfort or unpleasure, and a low level of exercise enjo...
Purpose: To investigate gait kinematics during single- and dual-task walking in glaucoma patients compared with healthy controls.
Methods: Nineteen glaucoma patients (10 females, 9 males) and 30 healthy controls (17 females, 13 males) participated in this cross-sectional study. Spatiotemporal gait parameters (e.g., stride length, velocity, minimum...
Intermittent hypoxia (IH) is commonly associated with pathological conditions, particularly obstructive sleep apnoea. However, IH is also increasingly used to enhance health and performance and is emerging as a potent non‐pharmacological intervention against numerous diseases. Whether IH is detrimental or beneficial for health is largely determined...
Background
Practical blood flow restriction (pBFR) during exercise is a cost-saving alternative to traditional blood flow restriction using pneumatic cuffs, particularly when exercising in a group setting. Depending on the pBFR technique, several factors (e.g., cuff width, limb circumference) have already been shown to be of importance when applyin...
Purpose:
This study investigated the acute effects of a static balance exercise combined with different blood flow restriction (BFR) pressures on motor performance fatigue development and recovery as well as physiological and perceptual responses during exercise in males and females.
Methods:
Twenty-four recreational active males (n = 13) and fe...
Acute severe injuries and degenerative diseases of the musculoskeletal system as well as surgical interventions are usually characterized by phases of restricted mobility with strongly reduced load-bearing capacity or complete immobility of corresponding areas [1]. This temporary or long-lasting situations are strongly associated with strength loss...
Introduction: Activities of daily living, such as walking, are impaired in chronic low back pain (CLBP) patients compared to healthy individuals. Thereby, pain intensity, psychosocial factors, cognitive functioning and prefrontal cortex (PFC) activity during walking might be related to gait performance during single and dual task walking (STW, DTW)...
This study investigated the acute performance, physiological, and perceptual changes during repeated sprint exercise (RSE) under normobaric hypoxia and with blood flow restriction (BFR). Fourteen active males completed standardized RSE (6 × 10s cycling sprints with 30s passive rest) in three randomized conditions: under normobaric hypoxia (FiO2∼14....
This study investigated the acute performance, physiological, and perceptual changes during repeated cycling sprint exercise (RCSE) under normobaric hypoxia and with blood flow restriction (BFR). Fourteen active males completed standardized RCSE (6x10s sprints with 30s passive rest) in three randomized conditions: under normobaric hypoxia (FiO2~1 4...
This chapter focuses primarily on gait-related motor performance fatigability, which can be defined as a decrease in gait performance in response to sustained walking tasks. After the definition of terms, the clinician’s as well as the patient’s views on this topic are described. This is followed by a brief overview of linear and nonlinear gait ana...
Background
Intermittent hypoxia applied at rest or in combination with exercise promotes multiple beneficial adaptations with regard to performance and health in humans. It was hypothesized that replacing normoxia by moderate hyperoxia can increase the adaptive response to the intermittent hypoxic stimulus.
Objective
Our objective was to systemati...
Background: Intermittent hypoxic-hyperoxic exposure (IHHE) and aerobic training have been proposed as non-pharmacological interventions to reduce age-related risk factors. However, no study has yet examined the effects of IHHE before aerobic exercise on cardiovascular risk factors in the elderly. Therefore, the aim of this study was to investigate...
Fatigue has been defined differently in the literature depending on the field of research. The inconsistent use of the term fatigue complicated scientific communication, thereby limiting progress towards a more in-depth understanding of the phenomenon. Therefore, Enoka and Duchateau (Med Sci Sports Exerc 48:2228–38, 2016, [3]) proposed a fatigue fr...
Zusammenfassung
Körperliche Aktivität in Form von Kraft- und Ausdauertraining kann zu einer akuten übungsinduzierten Hypoalgesie und chronischen Schmerzreduktion führen. Studien zeigen, dass vor allem hochintensive körperliche Aktivitäten diesen Effekt herbeiführen können. Insbesondere nach Verletzungen oder orthopädischen Eingriffen sind Patienten...
Background: It was recently shown that intermittent hypoxic-hyperoxic exposure (IHHE) applied prior to a multimodal training program promoted additional improvements in cognitive and physical performance in geriatric patients compared to physical training only. However, there is a gap in the literature to which extent the addition of IHHE can enhan...
There are conflicting results regarding the changes in spatio-temporal gait parameters during the 6-min walk test (6MWT) as indicators of gait-related motor performance fatigability (PF) in people with Multiple Sclerosis (pwMS). To further analyze if gait-related motor PF can be quantified using instrumented gait analysis during the 6MWT, we invest...
Fatigue is one of the most limiting symptoms in people with multiple sclerosis (pwMS) and can be subdivided into trait and state fatigue. Activity-induced state fatigue describes the temporary decline in motor and/or cognitive performance (motor and cognitive performance fatigability, respectively) and/or the increase in the perception of fatigue (...
There is considerable evidence showing that an acute bout of physical exercises can improve cognitive performance, but the optimal exercise characteristics (e.g., exercise type and exercise intensity) remain elusive. In this regard, there is a gap in the literature to which extent sprint interval training (SIT) can enhance cognitive performance. Th...
Background
Accumulating evidence shows that physical exercise has a positive effect on the release of neurotrophic factors and myokines. However, evidence regarding the optimal type of physical exercise for these release is still lacking. The aim of this study was to assess the acute and chronic effects of open-skill exercise (OSE) compared to clos...
Gait phase detection in IMU-based gait analysis has some limitations due to walking style variations and physical impairments of individuals. Therefore, available algorithms may not work properly when the gait data is noisy, or the person rarely reaches a steady state of walking. The aim of this work was to employ Artificial Intelligence (AI), spec...
Bielitzki, R, Behrendt, T, Behrens, M, and Schega, L. Current techniques used for practical blood flow restriction training: a systematic review. J Strength Cond Res XX(X): 000-000, 2021-The purpose of this article was to systematically review the available scientific evidence on current methods used for practical blood flow restriction (pBFR) trai...
The main goal of musculoskeletal rehabilitation is to achieve the pre-injury and/or pre-surgical physical function level with a low risk of re-injury. Blood flow restriction (BFR) training is a promising alternative to conventional therapy approaches during musculoskeletal rehabilitation because various studies support its beneficial effects on mus...
Considerable evidence has been accumulated showing that an acute bout of physical exercise can improve cognitive performance but the optimal exercise characteristics (e.g., exercise type and intensity) remain elusive. In this regard, there is a gap in the literature to which extent Sprint Interval Training (SIT) can enhance cognitive performance. T...
Background
Chronic low back pain (CLBP) is a common medical condition in adults over the age of 50. It is associated with severe disability, ranging from physical impairments to psychosocial distress. Since current treatments provide only small to moderate short-term effects, alternative interventions are required, whereby guidelines recommended mu...
"Fatigue"has been defined differently depending on the field of research (e.g., neurology, psychology, exercise physiology), which has led to an inconsistent use of the term, limiting scientific progress. Therefore, this article proposes a taxonomy that promotes a better understanding of fatigue in people with multiple sclerosis (pwMS), allowing a...
This article focuses on motor performance fatigability in people with multiple sclerosis (pwMS), which can be defined as the acute and temporary reduction in physical performance induced by a sustained motor task. Here, we provide an overview of the exercise protocols currently used to quantify motor performance fatigability in pwMS. The protocols...
Background:
There is growing evidence for a positive correlation between measures of muscular strength and cognitive abilities. However, the neurophysiological correlates of this relationship are not well understood so far. The aim of this study was to investigate cortical hemodynamics [i.e., changes in concentrations of oxygenated (oxyHb) and deo...
Chronic low-back pain is a major individual, social, and economic burden. The impairment ranges from deterioration of gait, limited mobility, to psychosocial distress. Due to this complexity, the demand for multimodal treatments is huge. Our purpose is to compare the effects of a multimodal movement intervention (MI) (coordinative–cognitive exercis...
Many established technologies are limited in analyzing the executive functions in motion, especially while walking. Functional near-infrared spectroscopy (fNIRS) fills this gap. The aim of the study is to investigate the inter-session reliability (ISR) of fNIRS-derived parameters at the prefrontal cortex while walking in people with multiple sclero...
Zusammenfassung
Das Primärziel muskuloskelettaler Rehabilitationsmaßnahmen orientiert auf die Wiederherstellung des prätraumatischen Leistungs- und Belastungsniveaus. Besonders infolge von orthopädischen Eingriffen oder nach Verletzungen sollte eine frühzeitige und progressive Rehabilitation erfolgen, um den Genesungsprozess optimal zu unterstützen...
Background
Resistance training (RT) under hypoxic conditions has been used to increase muscular performance under normoxic conditions in young people. However, the effects of RT and thus of RT under hypoxia (RTH) could also be valuable for parameters of physical capacity and body composition across the lifespan. Therefore, we compared the effects o...
Hintergrund und Zielstellung:
People suffering from Multiple Sclerosis (MS) are often impaired in locomotion (LaRocca, 2011). Hereby, fatigue is one of the most limiting symptoms in people with MS (pwMS) affecting over 80 % (Newland et al., 2016). (Kluger et al., 2013) differentiated between fatigue, the subjective feeling of exhaustion, and fatig...
Introduction
Accumulating evidence shows that acute resistance exercises and long-term resistance training positively influence cognitive functions, but the underlying mechanisms have been rarely investigated. One explanatory approach assumes that the execution of resistance exercises requires higher cognitive processes which, in turn, lead to an ‘...
Background: During the aging process, physical capabilities (e.g., muscular strength) and cognitive functions (e.g., memory) gradually decrease. Regarding cognitive functions, substantial functional (e.g., compensatory brain activity) and structural changes (e.g., shrinking of the hippocampus) in the brain cause this decline. Notably, growing evide...
In diesem Beitrag werden ausgewählte Fakten des aktuellen Kenntnisstandes zum Höhentraining in einem narrativen Überblick präsentiert. Dabei wird hinsichtlich der Wirkung unterschiedlicher Höhentrainingsmethoden vertiefend auf den Schwimmsport eingegangen. Es soll im deutschsprachigen Raum ein neuer Ausgangspunkt für den Einsatz des Höhentrainings...
The aim of the current study was to evaluate the effect of a cognitive dual task on minimum toe clearance (MTC) variability while walking. In a randomized cross-over design, gait kinematics of 25 older (70 ± 6 years) and 45 younger adults (25 ± 2 years) were captured during normal walking and dual-task walking. Variability of stride time, stride le...
Supervised and unsupervised machine learning algorithms were explored for gait segmentation using wearable sensor platform. Multiple wearable sensors modules were placed at key locations: Four Inertial Measurement Units (IMUs) were attached to the thigh and shank of each leg and a plantar pressure measuring foot insoles were implanted in the shoes....
Gait is an extraordinary complex function of human body that involves the activation of entire visceral nervous system, making human gait definite to various functional abnormalities. Diagnosis and treatment of such disorders prior to their development can be achieved through integration of modern technologies with state-of-the-art developed method...
Locomotion is one of the most important capabilities associated with activities of daily living and influences the quality of life directly. People suffering from Multiple Sclerosis (MS) are often impaired in locomotion and most of them have gait deficits. Many studies have already addressed the MS induced change in gait pattern, but the compensato...
The neuromotor control of walking relies on a network of subcortical and cortical structures. While kinematic differences
between treadmill and overground walking are extensively studied, the neuromotor control processes are still relatively
unknown. Hence, this study aims to investigate cortical activation during steady-state treadmill and overgro...
Purpose: Erythropoietin (EPO) has multifactorial positive effects on health and can be increased by intermittent normobaric hypoxia (IH). Recommendations about the intensity and duration of IH to increase EPO exist, but only for young people. Therefore, the aim of the study was to investigate the dose–response relationship regarding the duration of...
Introduction:
Locomotion is an important capability associated with activities of daily living and influences the quality of life directly. People suffering from an inflammatory disease with neurodegenerative component such as Multiple Sclerosis (MS) are often impaired in locomotion and over 41% of these people with MS (pwMS) have gait deficits [1...
Purpose: We aimed to investigate whether a blood flow restriction training (BFR) prior to a high intensity interval training (HIIT) leads to a higher increase in physical performance than a sole HIIT.
Methods: 24 male participants (18 to 30 years) were randomly assigned to a BFR+HIIT or HIIT group which performed 3 times per week over 4 weeks a HII...
Aging is accompanied by a decrease in physical capabilities (e.g., strength loss) and cognitive decline. The observed bidirectional relationship between physical activity and brain health suggests that physical activities could be beneficial to maintain and improve brain functioning (e.g., cognitive performance). However, the exercise type (e.g., r...
1. Introduction
Walking was generally considered as an automatic motor-task which does not rely on higher central nervous processes. This traditional view is challenged by recent evidence pointing towards a complicated neuromotor control of walking via a wide network of cortical and subcortical structures (Hamacher, Herold, Wiegel, Hamacher, & Sche...
Walking safely is a crucial ability for accomplishing most of the activities of daily living, independently. However, aging, injury or disease may change the gait and lead to higher risk of fall due to weakened lower-limb, poorer balance or other abnormal sensations. To be able to identify changes in gait pattern at an early stage, it is important...
Background: While the effects of diseases, performance of proprioceptors, anxiety or pain on gait stability or automaticity of walking are well-explored, physical fatigue might be another relevant factor whose consequences are not sufficiently investigated, yet.
Research question: The aim of the current study was to evaluate the effect of physical...
Background: Functional near-infrared spectroscopy (fNIRS) is a promising technique to assess cortical activity with the crucial advantage to be used in motion. An increase in cortical activity during dual-task walking is a predictor of falls in older individuals. Therefore, fNIRS measures could be capable markers to evaluate gait processes and to g...
The demographic change in industrial countries, with increasingly sedentary lifestyles, has a negative impact on mental health. Normal and pathological aging leads to cognitive deficits. This development poses major challenges on national health systems. Therefore, it is necessary to develop efficient cognitive enhancement strategies. The combinati...
Objective: Gait variability is an established marker to assess motor control of walking. Especially, the control of trunk movements during walking is pivotal to avoid falls. Another important role in avoiding falls plays the aspect of attention ensuring stable gait kinematics of the trunk. However, our knowledge about the cortical control of trunk...
Hypoxic conditions diminish motor performance and cognitive functions, especially when the motor task and the cognitive task are conducted simultaneously. Hypoxia does further increase prefrontal cortex activity which provokes a reduced capability of efficient resource utilisation. This, again, might evoke that the capacity of the limited mental re...
Safe locomotion is a crucial aspect of human daily living that requires well-functioning motor control processes. The human neuromotor control of daily activities such as walking relies on the complex interaction of subcortical and cortical areas. Technical developments in neuroimaging systems allow the quantification of cortical activation during...
Gait variability is frequently used to evaluate the sensorimotor system and elderly fallers compared to non-fallers exhibit an altered variability in gait parameters during unchanged conditions. While gait variability is often interpreted as movement error, it is also necessary to change the gait pattern in order to react to internal and external p...
Context:
The use of isokinetic dynamometers playing an important role in different settings of sports and medicine. Therefore, a high reliability of these devices is required.
Objective:
The aim of this study was to examine the inter-session reliability of the dynamometer BTE PrimusRS regarding to the isolated single-joint exercises extension /...
Rhythmic auditory cues aim to modulate step times while walking. Their effect on the variability of minimum foot clearance, which is “normally” the most controlled gait parameter in normal overground walking, has not been studied, yet. We aim to analyse the effects of auditory cues on the variability of foot clearance versus the variability of othe...