Fatiguing Exercise Intensity Influences the Relationship between Parameters Reflecting Neuromuscular Function and Postural Control Variables

Posture is commonly perceived as the relationship between the segments of the human body upright. Certain parts of the body such as the cephalic extremity, neck, torso, upper and lower limbs are involved in the final posture of the body. Musculoskeletal instabilities and reduced postural control lead to the installation of nonstructural posture deviations in all 3 anatomical planes. When we talk about the sagittal plane, it was concluded that there are 4 main types of posture deviation: hyperlordotic posture, kyphotic posture, rectitude and "sway-back" posture.Pilates method has become in the last decade a much more popular formof exercise used in rehabilitation. The Pilates method is frequently prescribed to people with low back pain due to their orientation on the stabilizing muscles of the pelvis. Pilates exercise is thus theorized to help reactivate the muscles and, by doingso, increases lumbar support, reduces pain, and improves body alignment.

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The link between ethnic diversity and scientific impact: the mediating effect of novelty and audience diversity

Scientometrics ◽

10.1007/s11192-021-04071-1 ◽

2021 ◽

Author(s):

Jielan Ding ◽

Zhesi Shen ◽

Per Ahlgren ◽

Tobias Jeppsson ◽

David Minguillo ◽

...

Keyword(s):

Ethnic Diversity ◽

Scientific Collaboration ◽

Information Science ◽

Mediating Effect ◽

Path Modeling ◽

Control Variables ◽

Scientific Impact ◽

Subject Categories ◽

Sound Management ◽

The Relationship

AbstractUnderstanding the nature and value of scientific collaboration is essential for sound management and proactive research policies. One component of collaboration is the composition and diversity of contributing authors. This study explores how ethnic diversity in scientific collaboration affects scientific impact, by presenting a conceptual model to connect ethnic diversity, based on author names, with scientific impact, assuming novelty and audience diversity as mediators. The model also controls for affiliated country diversity and affiliated country size. Using path modeling, we apply the model to the Web of Science subject categories Nanoscience & Nanotechnology, Ecology and Information Science & Library. For all three subject categories, and regardless of if control variables are considered or not, we find a weak positive relationship between ethnic diversity and scientific impact. The relationship is weaker, however, when control variables are included. For all three fields, the mediated effect through audience diversity is substantially stronger than the mediated effect through novelty in the relationship, and the former effect is much stronger than the direct effect between the ethnic diversity and scientific impact. Our findings further suggest that ethnic diversity is more associated with short-term scientific impact compared to long-term scientific impact.

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“Going Backward”: Effects of age and fatigue on posterior-directed falls in Parkinson disease

Neurorehabilitation ◽

10.3233/nre-210040 ◽

2021 ◽

pp. 1-9

Author(s):

Evan V. Papa ◽

Rita M. Patterson ◽

Nicoleta Bugnariu

Keyword(s):

Postural Control ◽

Parkinson Disease ◽

Repeated Measures ◽

Center Of Pressure ◽

Angular Displacement ◽

Reaction Times ◽

Older Individuals ◽

Peak Knee ◽

Significant Difference ◽

Fatiguing Exercise

BACKGROUND: Nearly half of persons with Parkinson disease (PD) report fatigue as a factor in their fall history. However, it is unknown whether these self-reported falls are caused by a sensation of fatigue or performance fatigue. OBJECTIVE: We sought to investigate the influences of performance fatigue and age on postural control in persons with PD. METHODS: Individuals with PD (n = 14) underwent postural control assessments before (T0) and immediately after (T1) fatiguing exercise. Biomechanical data were gathered on participants completing a treadmill-induced, posterior-directed fall. Performance fatigue was produced using lower extremity resistance exercise on an isokinetic ergometer. Repeated measures ANCOVAs were used with age as a covariate to determine the effects of performance fatigue on biomechanical variables. RESULTS: After adjustment for age, there was a statistically significant difference in peak center of pressure (COP) latency during the support phase of recovery. Pairwise comparisons demonstrated a decrease in peak ankle displacement from T0 to T1. Age was also found to be significantly related to reaction time and peak knee displacement while participants were fatigued. CONCLUSIONS: The decreased peak COP latency, along with decreased ankle angular displacement, suggest that persons with PD adopt a stiffening strategy in response to backward directed falls. Postural stiffening is not uncommon in persons with PD and could be a risk factor for falls. Older individuals with PD demonstrate slower mobility scores and decreased reaction times in the setting of fatigue, suggesting a combined effect of the aging and fatigue processes.

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The relationship between trunk position sense and postural control in ataxic individuals

Gait & Posture ◽

10.1016/j.gaitpost.2018.12.007 ◽

2019 ◽

Vol 68 ◽

pp. 258-263 ◽

Cited By ~ 3

Author(s):

Özge Onursal Kılınç ◽

Ender Ayvat ◽

Fatma Ayvat ◽

Gülşah Sütçü ◽

Muhammed Kılınç ◽

...

Keyword(s):

Postural Control ◽

Position Sense ◽

The Relationship ◽

Trunk Position

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Relationship between train users’ perceptions of walkability with access and egress mode choice

MATEC Web of Conferences ◽

10.1051/matecconf/201814702004 ◽

2018 ◽

Vol 147 ◽

pp. 02004 ◽

Cited By ~ 2

Author(s):

Romeiza Syafriharti ◽

B. Kombaitan ◽

Iwan P. Kusumantoro ◽

Ibnu Syabri

Keyword(s):

Built Environment ◽

Mode Choice ◽

Control Variable ◽

Walking Distance ◽

Vehicle Ownership ◽

Control Variables ◽

Gender And Age ◽

Access Mode ◽

Motorcycle Taxi ◽

The Relationship

The purpose of this study is to understand whether there is a relationship between train users’ perceptions of walkability in built environment of trip origin with access mode choice and between train users’ perceptions of walkability in built environment of trip destination with egress mode choice. Train users are who ride from Cicalengka station Bandung Regency, West Java, Indonesia. To analyze the relationship is used crosstab method. The perceptual factors about walkability are those perceived by the train users consisting of walking distance, safety, comfort, and secure from crime, both in origin and destination of the built environment. The mode choice consist of walking, paratransit, motorcycle taxi, and own vehicles (or others for egress mode). To better understand the relationship is used several control variables, that are trip purposes, train usage, gender, and age. For access trip there is another control variable, that is vehicle ownership. Train users' perceptions of walkability have a relationship with both the access and the egress mode choice, except for the security aspect. The influence of control variables on the relationship between perceptions of walkability with access/egress mode choice varies for walking distance, safety, and comfort.

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The Relationship Between Exercise Intensity and Affective Responses Demystified: To Crack the 40-Year-Old Nut, Replace the 40-Year-Old Nutcracker!

Annals of Behavioral Medicine ◽

10.1007/s12160-008-9025-z ◽

2008 ◽

Vol 35 (2) ◽

pp. 136-149 ◽

Cited By ~ 175

Author(s):

Panteleimon Ekkekakis ◽

Eric E. Hall ◽

Steven J. Petruzzello

Keyword(s):

Exercise Intensity ◽

Affective Responses ◽

The Relationship

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Relationship of potassium ions and blood lactate to ventilation during exercise

Applied Physiology Nutrition and Metabolism ◽

10.1139/h10-063 ◽

2010 ◽

Vol 35 (5) ◽

pp. 691-698

Author(s):

Robert G. McMurray ◽

Matthew S. Tenan

Keyword(s):

Blood Lactate ◽

Exercise Intensity ◽

Minute Ventilation ◽

Potassium Ions ◽

Ventilatory Control ◽

Volitional Fatigue ◽

Relationship Of ◽

Glycogen Stores ◽

The Relationship ◽

Recent Attention

Ventilatory control during exercise is a complex network of neural and humoral signals. One humoral input that has received little recent attention in the exercise literature is potassium ions [K+]. The purpose of this study was to examine the relationship between [K+] and ventilation during an incremental cycle test and to determine if the relationship between [K+] and ventilation differs when blood lactate [lac–] is manipulated. Eight experienced triathletes (4 of each sex) completed 2 incremental, progressive (5-min stages) cycle tests to volitional fatigue: 1 with normal glycogen stores and 1 with reduced glycogen. Minute ventilation was measured during the final minute of each stage, and blood [lac–] and [K+] were measured at the end of each exercise stage. Minute ventilation and [K+] increased with exercise intensity and were similar between trials (p > 0.5), despite lower [lac–] during the reduced-glycogen trial. The concordance correlations (Rc) between [lac–] and minute ventilation were stronger for both trials (Rc = ~0.88–0.96), but the slopes of the relationships were different than the relationships between [K+] and minute ventilation (Rc = ~0.76–0.89). The slope of the relationship between [lac–] and minute ventilation was not as steep during the reduced-glycogen trial, compared with the normal trial (p = 0.002). Conversely, the slope of the relationships between [K+] and minute ventilation did not change between trials (p = 0.454). The consistent relationship of minute ventilation and blood [K+] during exercise suggests a role for this ion in the control of ventilation during exercise. Conversely, the inconsistent relationship between blood lactate and ventilation brings into question the importance of the relationship between lactate and ventilation during exercise.

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