Effect of Ramadan fasting: Association with time of day on time-motion, technical aspect and psychophysiological response to simulated karate competition in young amateur competitors

Purpose Ramadan intermittent fasting (RIF) has produced heterogeneous and domain-specific effects on cognitive function. This study aims to investigate the effect of RIF on verticality perception or estimation of subjective visual vertical (SVV) in young adults. The significance of SVV is that it is essential for spatial orientation, upon which many daily activities depend. Methodology Verticality perception was assessed with a computerized rod and frame test (CRFT) in two visual conditions: without a surrounding frame and with a distracting tilted frame. The tilted frame condition measures level of visual dependence or reliance of visual cues for posture and orientation. In total, 39 young adult men were recruited at different stages of Ramadan fasting: 21 were tested at the end of the first week (Week 1) and 18 others at the end of the third week (Week 3) of Ramadan. Also, 39 participants were recruited to serve as a non-fasting control group. Factorial ANOVA analyses were conducted to identify the main effects of fasting status, time-of-day and the interaction between them on blood glucose levels, nocturnal sleep duration and vertical alignment errors. Findings The main effect of fasting status on glucose level was significant (p = 0.03). There was a significant time-of-day main effect on glucose levels (p = 0.007) and sleep duration (p = 0.004) only in fasting participants. Neither the main effects of fasting status nor time-of-day were significant for rod alignment errors in both visual conditions. The interaction of fasting status and time-of-day was not significant either. This may indicate that any negative effect of Ramadan fasting on activities that are critically dependent on verticality perception and spatial orientation, such as sports and driving, may not be due to verticality misperception. Originality The present study was the first to investigate the effect of Ramadan fasting on spatial orientation. It demonstrated robustness of verticality perception to fasting status and the point of fasting during Ramadan. Verticality perception was also unaffected by time-of-day effects in non-fasting and fasting groups at two different points of Ramadan. This study corroborates others reporting heterogeneous effects of Ramadan fasting on cognitive function.

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Psychophysiological responses to treadwall and indoor wall climbing in adult female climbers

Scientific Reports ◽

10.1038/s41598-021-82184-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jiří Baláš ◽

Jan Gajdošík ◽

Dominika Krupková ◽

Leona Chrastinová ◽

Alžběta Hlaváčková ◽

...

Keyword(s):

Video Analysis ◽

Metabolic Response ◽

Venous Blood ◽

Lower Grade ◽

Psychophysiological Response ◽

Time Motion ◽

Climbing Ability ◽

Load Characteristics ◽

Climbing Wall ◽

Catecholamine Concentration

AbstractThe purpose of the study was to compare the psychophysiological response of climbers of a range of abilities (lower grade to advanced) when ascending identical climbing routes on a climbing wall and a rotating treadwall. Twenty-two female climbers (31.2 ± 9.4 years; 60.5 ± 6.5 kg; 168.6 ± 5.7 cm) completed two identical 18 m climbing trials (graded 4 on the French Sport scale) separated by 1 week, one on the treadwall (climbing low to the ground) and the other on the indoor wall (climbing in height). Indirect calorimetry, venous blood samples and video-analysis were used to assess energy cost, hormonal response and time-load characteristics. Energy costs were higher during indoor wall climbing comparing to those on the treadwall by 16% (P < 0.001, $$\upmu _{{\text{p}}}^{2}$$ μ p 2 = 0.48). No interaction of climbing ability and climbing condition were found. However, there was an interaction for climbing ability and post-climbing catecholamine concentration (P < 0.01, $$\upmu _{{\text{p}}}^{2}$$ μ p 2 = 0.28). Advanced climbers’ catecholamine response increased by 238% and 166% with respect to pre-climb values on the treadwall and indoor wall, respectively; while lower grade climbers pre-climb concentrations were elevated by 281% and 376% on the treadwall and indoor wall, respectively. The video analysis showed no differences in any time-motion variables between treadwall and indoor wall climbing. The study demonstrated a greater metabolic response for indoor wall climbing, however, the exact mechanisms are not yet fully understood.

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DOES RAMADAN FASTING AFFECT DIURNAL VARIATION ON SWIMMING PERFORMANCE AND ANAEROBIC POWER?

European Journal of Physical Education and Sport Science ◽

10.46827/ejpe.v7i2.3818 ◽

2021 ◽

Vol 7 (2) ◽

Author(s):

Salah Ferchichi ◽

Yana Taktak

Keyword(s):

Diurnal Variation ◽

Body Mass ◽

Muscle Power ◽

Swimming Performance ◽

Anaerobic Power ◽

Time Of Day ◽

Wingate Test ◽

Diurnal Variations ◽

Stroke Length ◽

Ramadan Fasting

The aim of this study is to see whether Ramadan fasting has an effect on the diurnal variations in anaerobic power and swimming performance or not. Ten participants whose mean ± SE for age, height, body mass are 19.4 ± 1.4 years, 1.72 ± 0.1 m and 72.8 ± 6.6 kg, respectively. They are tested at 3 testing periods [i.e., one week before Ramadan (BR), the middle period of Ramadan (MPR), the end period of Ramadan (EPR)], tests are performed at 07:00 h and 17:00 h throughout every course. The test sessions were started with oral temperature and body mass measurements. Regularly doing first the Wingate test then a 25-m swim at maximal speed at each test session. During the three experimental periods, dietary intake was assessed. The result shows a significant diurnal variation of muscle power and fatigue throughout the Wingate test before Ramadan. Likewise, there is a daily rhythm in the stroke parameters and swimming performance in the mentioned period. These diurnal variations change during the month of Ramadan with a decrease in power output, swim performance, swim speed and stroke length in the evening, with no changes for the morning tests. Moreover, the diurnal variations of muscle fatigue during the three morning tests show no changes and remain the same. Whereas the three evening tests show a gradual increase towards tiredness. The results show that Ramadan may has a great effect on the circadian rhythm of muscle power and swimming performance. The time-of-day effects the anaerobic power variables during the normal days which disappear during Ramadan. Ramadan fasting effects performance in the evening; however, the morning performance tests are unchangeable during Ramadan. Additionally, Ramadan fasting has no adverse effect on energy intake, and percentages of macronutrient intake. Article visualizations:<img src="/-counters-/edu_01/0856/a.php" alt="Hit counter" />

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The Effect of Time-of-Day and Ramadan Fasting on Anaerobic Performances

Yearbook of Sports Medicine ◽

10.1016/j.yspm.2012.03.061 ◽

2012 ◽

Vol 2012 ◽

pp. 208-210

Author(s):

R.J. Shephard

Keyword(s):

Time Of Day ◽

Ramadan Fasting

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A Descriptive Time Inventory of Emergency Department Nursing Workflows

Proceedings of IMPRS ◽

10.18060/22775 ◽

2018 ◽

Vol 1 (1) ◽

Author(s):

Dana Skold ◽

Alice Mitchell, MD

Keyword(s):

Emergency Department ◽

Patient Care ◽

Patient Flow ◽

Time Of Day ◽

High Turnover ◽

Time Motion ◽

Operational Load ◽

Nursing Activity ◽

Level I ◽

The Impact

Background: Previous emergency department (ED) process improvement efforts used probabilistic analytical or simulated models without considering the impact of specific tasks on ED patient flow and resource needs. We focus on the tasks and workflows that comprise nursing activity in an urban academic ED and level I trauma center receiving over 80,000 annual visits. Experimental Design: Using a time/motion observational methodology, we create a minute-by-minute time inventory account of nursing tasks and workflows as observed through the activities of 35 nurses over 124.5 hours, representative of 24/7 patient care in 7 ED care areas. “Tasks” were defined as discrete, measurable, and consequential step(s) to accomplish a clinically meaningful goal (“workflow”). The task with highest cognitive demand for each minute of observation was recorded. We also tracked 12 discrete highest-acuity (“shock”) events and catalogued second-by-second observational accounts of each nurse diverted. Results: Our data demonstrate significant variation in tasks based on time of day. We observed substantial operational load moving patients between care areas, with intake and discharge comprising 25% of nurse workflows. Downtime averaged 32%, with variation depending on care area. Downtime was highest (47%) with passive video monitoring of psychiatric care and lowest (22%) in high-turnover intake areas. Highest-acuity patient-care events result in significant and variable nurse diversion from other tasks averaging 1:03:29 in combined nursing effort. Conclusion and Potential Impact: Movement of patients between care areas represents significant operational load. Interruptions and task preparation accounted for a surprising portion of activity. Highest-acuity patient care events result in substantial and variable diversion of nurse care.

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