scholarly journals Cardiorespiratory and Thermoregulatory Parameters Are Good Surrogates for Measuring Physical Fatigue during a Simulated Construction Task

2020 ◽  
Vol 17 (15) ◽  
pp. 5418
Author(s):  
Shahnawaz Anwer ◽  
Heng Li ◽  
Maxwell Fordjour Antwi-Afari ◽  
Waleed Umer ◽  
Arnold Y. L. Wong
Keyword(s):  
Heart Rate ◽  
Skin Temperature ◽  
Electrodermal Activity ◽  
Physical Workload ◽  
Breathing Rate ◽  
Physical Fatigue ◽  
Local Skin ◽  
Local Skin Temperature ◽  
The Right ◽  
Construction Task

Cardiorespiratory (e.g., heart rate and breathing rate) and thermoregulatory (e.g., local skin temperature and electrodermal activity) responses are controlled by the sympathetic nervous system. To cope with increased physical workload, the sympathetic system upregulates its activity to generate greater sympathetic responses (i.e., increased heart rate and respiratory rate). Therefore, physiological measures may have the potential to evaluate changes in physical condition (including fatigue) during functional tasks. This study aimed to quantify physical fatigue using wearable cardiorespiratory and thermoregulatory sensors during a simulated construction task. Twenty-five healthy individuals (mean age, 31.8 ± 1.8 years) were recruited. Participants were instructed to perform 30 min of a simulated manual material handling task in a laboratory. The experimental setup comprised a station A, a 10-metre walking platform, and a station B. Each participant was asked to pick up a 15 kg ergonomically-designed wooden box from station A and then carried it along the platform and dropped it at station B. The task was repeated from B to A and then A to B until the participants perceived a fatigue level > 15 out of 20 on the Borg-20 scale. Heart rate, breathing rate, local skin temperature, and electrodermal activity at the wrist were measured by wearable sensors and the perceived physical fatigue was assessed using the Borg-20 scale at baseline, 15 min, and 30 min from the baseline. There were significant increases in the heart rate (mean changes: 50 ± 13.3 beats/min), breathing rate (mean changes: 9.8 ± 4.1 breaths), local skin temperature (mean changes: 3.4 ± 1.9 °C), electrodermal activity at the right wrist (mean changes: 7.1 ± 3.8 µS/cm), and subjective physical fatigue (mean changes: 8.8 ± 0.6 levels) at the end of the simulated construction task (p < 0.05). Heart rate and breathing rate at 15 and 30 min were significantly correlated with the corresponding subjective Borg scores (p < 0.01). Local skin temperature at 30 min was significantly correlated with the corresponding Borg scores (p < 0.05). However, electrodermal activity at the right wrist was not associated with Borg scores at any time points. The results implied cardiorespiratory parameters and local skin temperature were good surrogates for measuring physical fatigue. Conversely, electrodermal activity at the right wrist was unrelated to physical fatigue. Future field studies should investigate the sensitivity of various cardiorespiratory and thermoregulatory parameters for real time physical fatigue monitoring in construction sites.

Quantifying Occupational Stress in Intensive Care Unit Nurses: An Applied Naturalistic Study of Correlations Among Stress, Heart Rate, Electrodermal Activity, and Skin Temperature

2021 ◽  
pp. 001872082110408
Author(s):  
Nima Ahmadi ◽  
Farzan Sasangohar ◽  
Tariq Nisar ◽  
Valerie Danesh ◽  
Ethan Larsen ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Heart Rate ◽  
Intensive Care ◽  
Skin Temperature ◽  
Electrodermal Activity ◽  
Laboratory Research ◽  
Prior Literature ◽  
High Level ◽  
Intensive Care Unit Nurses ◽  
Skin Temperatures

Objective To identify physiological correlates to stress in intensive care unit nurses. Background Most research on stress correlates are done in laboratory environments; naturalistic investigation of stress remains a general gap. Method Electrodermal activity, heart rate, and skin temperatures were recorded continuously for 12-hr nursing shifts (23 participants) using a wrist-worn wearable technology (Empatica E4). Results Positive correlations included stress and heart rate (ρ = .35, p < .001), stress and skin temperature (ρ = .49, p < .05), and heart rate and skin temperatures (ρ = .54, p = .0008). Discussion The presence and direction of some correlations found in this study differ from those anticipated from prior literature, illustrating the importance of complementing laboratory research with naturalistic studies. Further work is warranted to recognize nursing activities associated with a high level of stress and the underlying reasons associated with changes in physiological responses. Application Heart rate and skin temperature may be used for real-time detection of stress, but more work is needed to validate such surrogate measures.

Relation of local skin temperature and local sweating to cutaneous blood flow

1963 ◽  
Vol 18 (4) ◽  
pp. 781-785 ◽  
Author(s):  
Leo C. Senay ◽  
Leon D. Prokop ◽  
Leslie Cronau ◽  
Alrick B. Hertzman
Keyword(s):  
Blood Flow ◽  
Skin Temperature ◽  
Sweat Gland ◽  
Cutaneous Blood Flow ◽  
Local Skin ◽  
Cutaneous Vasodilatation ◽  
Local Skin Temperature ◽  
Relationship Of ◽  
The Relationship ◽  
Cutaneous Blood

The relationship of local skin temperature and the onset of sweating to the local cutaneous blood flow was studied in the forearm and calf. The purpose of the investigation was to appraise the possible relation of sweat gland activity to the cutaneous vasodilatation which has been attributed to bradykinin or to intracranial temperatures. The onset of sweating was not marked by any apparently related increases in the rate of cutaneous blood flow. On the contrary, the onset of sweating was followed often by a stabilization or even a decrease in the level of cutaneous blood flow. The relations of the latter to the local skin temperature were complex, particularly in the forearm. There appeared to be additional unidentified influences, possibly vasomotor, operating on the skin vessels during transitional phases in the relation of skin temperature to blood flow. Submitted on October 15, 1962

The effect of environmental temperature on the growth of vertebrae in the tail of the mouse

Development ◽  
1970 ◽  
Vol 24 (2) ◽  
pp. 405-410
Author(s):  
Janet F. Noel ◽  
E. A. Wright
Keyword(s):  
Skin Temperature ◽  
Environmental Temperature ◽  
Tissue Temperature ◽  
Local Skin ◽  
Temperature Growth ◽  
Peripheral Organs ◽  
Hot Environment ◽  
Caudal Vertebrae ◽  
Local Skin Temperature ◽  
C3h Mice

C3H mice were bred at 30°C and 22°C. At 28 days of age the lengths of the sacral and caudal vertebrae were measured from radiographs and related to the local skin temperature. Growth of the sacral and proximal caudal vertebrae was slightly retarded in the hot environment, but the distal caudal vertebrae showed increased growth which could be quantitatively related to an increase in skin temperature. This suggests that in hot climates the increased growth of peripheral organs of some mammals is due to local increases in tissue temperature.

scholarly journals Effect of local skin blood flow during light and medium activities on local skin temperature predictions

2019 ◽  
Vol 84 ◽  
pp. 439-450
Author(s):  
Stephanie Veselá ◽  
Boris R.M. Kingma ◽  
Arjan J.H. Frijns ◽  
Wouter D. van Marken Lichtenbelt
Keyword(s):  
Blood Flow ◽  
Skin Temperature ◽  
Skin Blood Flow ◽  
Local Skin ◽  
Local Skin Temperature

The Effect of Pressure on Skin Temperature Measurements for a Disk Sensor

1979 ◽  
Vol 101 (4) ◽  
pp. 261-266 ◽  
Author(s):  
S. D. Mahanty ◽  
R. B. Roemer
Keyword(s):  
Skin Temperature ◽  
Human Subjects ◽  
Reactive Hyperemia ◽  
Circular Disk ◽  
Temperature Measurements ◽  
Whole Body ◽  
Local Pressure ◽  
Local Skin ◽  
Local Skin Temperature ◽  
Skin Temperatures

In order to determine the effect of application pressure on the accuracy of skin temperature measurements for area contact sensors, low values of pressure (2-20 mm Hg) were applied to the mid-thigh and to the lateral aspect of the trochanter of human subjects using a thin, circular disk with a thermistor mounted in the base. From measurements of the local skin temperatures, it was determined that a pressure of 2 mm Hg is adequate to measure the skin temperature accurately. Applying larger pressure results in higher local skin temperatures with the thighs showing larger temperature increases than the trochanters. The results of a finite difference analysis indicate that the increases in skin temperature at higher pressures can be accounted for by the physical phenomena associated with the penetration of the sensor into the tissue. After the release of pressure, the local skin temperature immediately decreased for all subjects indicating little or no reactive hyperemia was occurring. A method of compensating for the changes in local skin temperature which are due to whole body transient thermal effects was also developed. Use of this method allows the effects of the local pressure application to be separated from the transient environmental effects.

Changes in local skin temperature after the application of a pulsed Nd:YAG laser to healthy subjects: a prospective crossover controlled trial

2019 ◽  
Vol 34 (8) ◽  
pp. 1681-1688
Author(s):  
Mohamed Salaheldien Alayat ◽  
Ahmed Mohamed Elsodany ◽  
Abdulrahman Fuad Miyajan ◽  
Abdulrhman Ali Alzhrani ◽  
Hussam Mohammed Saeed Alzhrani ◽  
...  
Keyword(s):  
Skin Temperature ◽  
Nd:Yag Laser ◽  
Healthy Subjects ◽  
Controlled Trial ◽  
Local Skin ◽  
Pulsed Nd:Yag Laser ◽  
Local Skin Temperature

scholarly journals The influence of local skin temperature on the sweat glands maximum ion reabsorption rate

2019 ◽  
Vol 119 (3) ◽  
pp. 685-695 ◽  
Author(s):  
N. Gerrett ◽  
T. Amano ◽  
G. Havenith ◽  
Y. Inoue ◽  
Narihiko Kondo
Keyword(s):  
Skin Temperature ◽  
Sweat Glands ◽  
Local Skin ◽  
Local Skin Temperature ◽  
Reabsorption Rate

With a Little Help from My Friend: Emotional Expressiveness in a Female Digital Human and User Gender Interact to Affect Psychological and Physiological Outcomes (Preprint)

2021 ◽  
Author(s):  
Kate Loveys ◽  
Mark Sagar ◽  
Xueyuan Zhang ◽  
Gregory Fricchione ◽  
Elizabeth Broadbent
Keyword(s):  
Social Support ◽  
Heart Rate ◽  
Skin Temperature ◽  
Emotional Expression ◽  
Electrodermal Activity ◽  
Emotional Expressiveness ◽  
Subjective Stress ◽  
Digital Humans ◽  
Physiological Outcomes ◽  
Digital Human

BACKGROUND Loneliness is a growing public health problem that has been exacerbated in vulnerable groups during the COVID-19 pandemic. Social support interventions have been shown to improve loneliness and may be delivered through technology. Digital humans are a new type of computer agent that show promise as supportive peers in healthcare. For digital humans to be effective and engaging support persons, it is important that they can develop closeness with people. Closeness can be improved by emotional expressiveness, particularly in female relationships. However, it is unknown whether emotional expressiveness improves closeness in relationships with digital humans and affects physiological responses. OBJECTIVE This study investigated whether emotional expression by a digital human can affect psychological and physiological outcomes, and whether the effects are moderated by user gender. METHODS 198 healthy adults (101 females, 95 males, 2 gender-diverse individuals) were block-randomized by gender to complete a 15-minute self-disclosure conversation with a female digital human, in one of six conditions. In these conditions, the digital human varied in modality richness and emotional expression in the face and voice (emotional/ neutral/ no face; emotional/ neutral voice). Perceived loneliness, closeness, social support, caring perceptions, and stress were measured after the interaction. Physiological measures including heart rate, skin temperature, and electrodermal activity were collected during the interaction using an Empatica E4 watch. Three-way factorial ANOVA with post hoc tests were conducted to analyse the effect of face type, voice type, and user gender on outcomes. RESULTS Overall, emotional expression in the voice was associated with greater caring perceptions and physiological arousal during the interaction, and unexpectedly, lower feelings of support. Gender was found to moderate the effect of emotional expressiveness on loneliness, social, and certain physiological outcomes. For females, an emotional voice digital human was associated with improved perceptions of closeness, social support, and caring perceptions, whereas for males, a neutral voice digital human was associated with improvements in closeness, social support, and caring perceptions. For females, a neutral face was associated with lower loneliness and subjective stress compared to no face. Whereas interacting with no face (i.e., a voice only black screen) resulted in lower loneliness and subjective stress for males compared to a neutral or emotional face digital human. No significant results were found for heart rate or skin temperature. However, average electrodermal activity was significantly higher for males while interacting with the emotional voice digital human. CONCLUSIONS Findings suggest that emotional expressiveness in a female digital human has different effects on loneliness, social, and physiological outcomes for males and females. Results may inform the design of digital human support persons, and have theoretical implications. Further research is needed to evaluate how more pronounced emotional facial expressions in a digital human might impact results. CLINICALTRIAL Australia New Zealand Clinical Trials Registry (ANZCTR) registration application Id: 381816

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