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Fulltext Aerobic capacity and habitual physical activity in three groups of apparently healthy Malay males

Shahabudin SH

Med J Malaysia, 1981 Mar;36(1):47-51.
PMID: 7321938
Matched MeSH terms: Physical Exertion*
Fulltext Maximum acceptable frequency of lift for combined manual material handling task in Malaysia

Widia M, Md Dawal SZ, Yusoff N

PLoS One, 2019;14(5):e0216918.
PMID: 31141545 DOI: 10.1371/journal.pone.0216918

BACKGROUND: Extensive studies have been carried out over the years to determine the maximum acceptable weight that a worker is capable of lifting in a given situation among Occidental populations across Europe and US. Nonetheless, studies that place emphasis on using lifting frequency as the quantifying task parameter, especially in developing countries such as Malaysia, appear to be in scarcity. Hence, this study determined the maximum acceptable frequency of lift (MAFL) for combined manual material handling (MMH) tasks amongst Malaysian males.
METHOD: Two lifting loads were considered in this study: 1 kg and 5 kg. Each subject adjusted his frequency of lifting using a psychophysical approach. The subjects were instructed to perform combined MMH task as fast as they could over a period of 45 minutes without exhausting themselves or becoming overheated. The physiological response energy expenditure was recorded during the experimental sessions. The ratings of perceived exertion (RPE) for four body parts (forearms, upper arm, lower back and entire body) were recorded after the subjects had completed the instructed task.
RESULTS: The mean frequencies of the MMH task had been 6.8 and 5.5 cycles/minute for lifting load of 1 and 5 kg, respectively, while the mean energy expenditure values were 4.16 and 5.62 kcal/min for 1 and 5 kg load, respectively. These displayed a significant difference in the Maximum Acceptable Frequency of Lift (MAFL) between the two loads, energy expenditure and RPE (p < 0.05) whereby the subjects appeared to work harder physiologically for heavier load.
CONCLUSION: It can be concluded that it is significant to assess physiological response and RPE in determining the maximum acceptable lifting frequency at varied levels of load weight. The findings retrieved in this study can aid in designing tasks that do not exceed the capacity of workers in order to minimise the risk of WRMSDs.

Matched MeSH terms: Physical Exertion/physiology*
Fulltext Neglected acute post exertional anterior compartment syndrome: a case report

Sambandan S

Med J Malaysia, 1985 Dec;40(4):338-40.
PMID: 3842737

A case of Acute Post Exertional Anterior Compartment Syndrome of the leg, seen five days after the onset of symptoms is presented. Decompression with delayed closure was done. There was only sensory recovery. However functional recovery at one year was good. Acute Post Exertional Compartment Syndrome cases are diagnosed late due to the lack of awareness, the paucity of radiological features, and the presence of intact peripheral pulses. A review of the literature revealed no previous documentation from South-East Asia.

Matched MeSH terms: Physical Exertion*
Ethnic differences in physiological responses to maximal effort in Malaysian adolescents

Thinakaran T, Nor M, Duncan MT, Chan OL, Klissouras V

Med J Malaysia, 1974 Sep;29(1):24-8.
PMID: 4282626
Matched MeSH terms: Physical Exertion*
Identification of trigger mechanisms in bronchial asthma

Zulkifli A, Hwa NW, Chelvam P

Med J Malaysia, 1979 Dec;34(2):156-8.
PMID: 548719
Matched MeSH terms: Physical Exertion*
Fulltext Bilateral cavernous sinus and left dural sigmoid sinus thrombosis associated with extreme exertion: a case report

Wern-Yih C, Jan-Bond C, Sudha M, Norlelawati A, Shatriah I

Arq Bras Oftalmol, 2021 1 21;84(1):83-86.
PMID: 33470347 DOI: 10.5935/0004-2749.20210013

Septic cavernous sinus thrombosis is a rare but often debilitating and potentially fatal disease. We describe a case of bilateral orbital cellulitis with rapidly progressing cavernous sinus thrombosis and left sigmoidal sinus thrombosis in an immunocompetent 20-year-old military man who had undergone intensive physical training. The patient presented with rapid painful swollen left eye for 2 days. The examination results were gross proptosis with total ophthalmoplegia. He was treated with intravenous antibiotics and corticosteroid. At 1 week, visual acuity improved to 20/20 OU, with a normal intraocular pressure. There was a significant improvement in proptosis. The ocular motility of the right eye was fully restored, with slight residual ophthalmoplegia in the left eye. There was no residual illness or recurrence of illness at 3 months' follow-up.

Matched MeSH terms: Physical Exertion
Fulltext Preliminary analysis of conformity of LADM for modelling 3D/4D situation

Babalola Sunday Oyetayo, Abdulrahman Alias, Tan, Choon Liant, Mohammed Jawalludeen Sani, Shuaibu Umar

Journal of Advanced Research Design, 2017;38(1):1-12.
MyJurnal

One of the prime inspirations for this work emerge from the need to deal with our
common assets (the Land). To build up a formal approach that can be utilized to
address the issues emerges from a mind boggling circumstance in land
administration. The capacity to track the progressions as it is connected to land
everywhere throughout the year. A considerable lot of the land exchanges are as yet
in light of 2D ideal models that have frustrated fast advancement in thickly urban
condition. The consideration of 3D enhanced the functionalities of different models.
Be that as it may, the dynamic idea of the land has an imperative part in the
advancement of the land administration framework. One of the significant reason the
expansion in intricacy in land utilize required that Land Administration Domain Model
(LADM) concept in land administration has an enhanced limit is to deal with the
current 2D and 3D. The need to talk about time dimension emerges from the way
that individuals relationship to the land has an exceptionally powerful nature, all the
LADM packages has time (Temporal) components. LADM completely bolster forming
(historical information) as all classes inherit from VersionObject, and all LA_RRR
object have the quality TimeSpace. 2D/3D space and time incorporation is not
profoundly integrated into a 3D/4D spatiotemporal portrayal. The preparatory test
case in this study affirmed the conceivable outcomes of having a move or
development (with time) of characteristic limits from their underlying positions. Thus,
the dynamic idea of the land in connection to man, the benefits of this model to the
land proprietors, land merchants, and the administration can't be over stressed. This
study tries to clarify the current 2D/3D approach and broke down preparatory
requirements for 4D with a specific end goal to see the estimation of the approach.
The primary future research exertion focuses on melding on the most proficient
method to coordinate the model completely into Country profile in the study area.

Matched MeSH terms: Physical Exertion
Bilateral internal jugular vein ectasia: a report of two cases

Gendeh BS, Dhillon MK, Hamzah M

J Laryngol Otol, 1994 Mar;108(3):256-60.
PMID: 8169515

Internal jugular vein ectasia is a venous anomaly commonly presenting as a unilateral neck swelling in children and adults. Literature reports of bilateral presentation are rare. Bilateral Doppler ultrasonography is the diagnostic investigation of choice. The possible pathology, aetiology and management are discussed. Conservative management of bilateral cases is recommended in uncomplicated cases.

Matched MeSH terms: Physical Exertion
Fulltext Health risk assessment of pm10 exposure among Malaysian adult population based on physical activity pattern

Norlen Mohame, Lokman Hakim, S., Thahirahtul Asma Zakaria, Anis Salwa Kamarudin, Ahmad Riadz Mazeli, Sirajuddin Hashim

Int J Public Health Res, 2017;7(2):814-828.
MyJurnal

Introduction: Most health advisories related to outdoor physical activity during haze are general in nature. The advisories normally advise everyone to reduce or limit prolonged exertion or heavy exertion without mentioning the acceptable duration for performing outdoor physical activity causing difficulty for public to decide to stop or cancel a particular outdoor or sport event. The aim of this paper is to determine the acceptable duration for performing outdoor physical activity pattern during haze based on API level.

Methods: Health risk assessment approach that comprises of hazard identification, exposure assessment, dose-response, and risk characterization steps was used to determine the potential inhaled dose and risk associated with performing the physical activity during haze. We have considered many factors that include time spent for physical activity patterns for Malaysian adult, age and physical intensity-specific inhalation rate (m3/min), and the indoor/outdoor ratio of PM10. A hypothetical exposure scenario of PM10 was created using the breakpoints of PM10 concentration for the calculation of respective API levels during haze.

Results: The association between physical activity pattern, API level and risk quotient were presented in the form of risk radar diagram. Based on the 50th percentile inhalation rate, all prolonged exertion and heavy exertion should be avoided when API reach >201 (very unhealthy) and >175 (unhealthy) respectively. Below the said API, the duration for performing prolonged exertion and heavy exertion should be reduced according to the API level. When API reaches 140, high intensity physical activity should be limited to < 90 minutes. A football match which requires 90 minutes, should be postponed of cancelled if API > 140. Whereas, for the same API level, prolonged exertion (moderate intensity physical activity) should be limited to 4 hours.

Conclusions: Reducing the physical activity is an effective strategy to lower the dose of inhaled pollutants and reduce the health risk during poor air quality. Based on the assessment, taking into account the uncertainty of risk assessment methodology, we proposed all prolonged exertion should be avoided when API reach very unhealthy status (>201). Below the said API level, outdoor physical activity should be reduced according to the level of API respectively. The recommendation is not applicable for the sensitive groups. The computed risk radar provide a valuable guide for the public to organize or considering postponing an outdoor event during haze.

Matched MeSH terms: Physical Exertion
Fulltext Minimal Agreement between Internal and External Training Load Metrics across a 2-wk Training Microcycle in Elite Squash

James C, Dhawan A, Jones T, Pok C, Yeo V, Girard O

J Sports Sci Med, 2021 03;20(1):101-109.
PMID: 33707993 DOI: 10.52082/jssm.2021.101

This study investigated the relationships between internal and external training load metrics across a 2-week 'in-season' microcycle in squash. 134 on-court and 32 off-court 'conditioning' sessions were completed by fifteen elite squash players with an average (±SD) of 11 ± 3 per player. During every session, external load was captured using a tri-axial accelerometer to calculate Playerload; i.e., the instantaneous rate of change of acceleration across 3-dimensional planes. Internal load was measured using heart rate (HR), global (sRPE) and differential RPE (dRPE-Legs, dRPE-Breathing). Additionally, HR was used to calculate Banister's, Edward's and TEAM TRIMPs. Across 166 training sessions, Playerload was moderately correlated with TRIMP-Banister (r = 0.43 [95% CI: 0.29-0.55], p < 0.001) and TRIMP-Edwards (r = 0.50 [0.37-0.61], p < 0.001). Association of Playerload with TRIMP-TEAM (r = 0.24 [0.09-0.38], p = 0.001) was small. There was a moderate correlation between sRPE and Playerload (r = 0.46 [0.33-0.57], p < 0.001). Association of sRPE was large with TRIMP-Banister (r = 0.68 [0.59-0.76], p = 0.001), very large with TRIMP-Edwards (r = 0.79 [0.72-0.84], p < 0.001) and moderate with TRIMP-TEAM (r = 0.44 [0.31-0.56], p < 0.001). Both dRPE-Legs (r = 0.95 [0.93-0.96], p < 0.001) and dRPE-Breathing (r = 0.92 [0.89-0.94], p < 0.001) demonstrated nearly perfect correlations with sRPE and with each other (r = 0.91 [0.88-0.93], p < 0.001). Collection of both internal and external training load data is recommended to fully appreciate the physical demands of squash training. During a training microcycle containing a variety of training sessions, interpreting internal or external metrics in isolation may underestimate or overestimate the training stress a player is experiencing.

Matched MeSH terms: Physical Exertion
Influence of diet and physical activity on serum cholesterols

Banerjee B, Saha N

Med J Malaya, 1968 Jun;23(4):332-6.
PMID: 4235599
Matched MeSH terms: Physical Exertion
Does Warming Up With Wearable Resistance Influence Internal and External Training Load in National Level Soccer Players?

Uthoff A, Bustos A, Metral G, Cronin J, Dolcetti J, Rumpf MC

Sports Health, 2021 11 15;14(1):92-98.
PMID: 34781770 DOI: 10.1177/19417381211055696

BACKGROUND: Adding wearable resistance (WR) to training results in superior performance compared with unloaded conditions. However, it is unclear if adding WR during warm-up influences training load (TL) in the subsequent session. The aim of this research was to track TL in soccer players during the transition from late preseason to early in-season and examine whether adding WR to the lower leg during a warm-up influenced TL measures during warm-ups and on-field training sessions after WR was removed.
HYPOTHESIS: The addition of WR worn on the lower legs during an on-field warm-up would lead to decreases in relatively high-intensity external TL metrics, such as distance covered >6.11 m∙s-1 and acceleration and deceleration >/<3 m∙s-2 and increases in internal TL during the warm-up, yet would have little effect on the subsequent training session when WR was removed.
STUDY DESIGN: Matched-pair randomized design.
LEVEL OF EVIDENCE: Level 3.
METHODS: A total of 28 soccer players were allocated to either a WR training (WRT = 14) or unloaded (control [CON] = 14) group. Both groups performed the same warm-up and on-field training for 8 weeks, with the WRT group wearing 200 g to 600 g loads on their lower leg during the warm-up. External TL was measured via global positioning system data and internal TL was assessed using session rating of perceived exertion (sRPE × time per session).
RESULTS: No statistically significant between-group differences (P ≥ 0.05) were identified for any TL measurement during either warm-ups or training sessions. Lower leg WR resulted in trivial to moderate effects for all external TL metrics (-16.9% to 2.40%; d = -0.61 to 0.14) and sRPE (-0.33%; d = -0.03) during the warm-up and trivial to small effects on all external TL metrics (-8.95% to -0.36%; d = -0.45 to -0.30) and sRPE (3.39%; d = 0.33) during training sessions.
CONCLUSION: Warming up with lower leg WR negatively affects neither the quality and quantity of the warm-up nor the subsequent training session once WR is removed.
CLINICAL RELEVANCE: Using WR on the lower leg during on-field warm-ups may be a means to "microdose" strength training while not unduly increasing TL. However, further research is needed to determine the influence of WR on strength qualities.

Matched MeSH terms: Physical Exertion
Fulltext Sharp turning and corner turning: comparison of energy expenditure, gait parameters, and level of fatigue among community-dwelling elderly

Justine M, Manaf H, Sulaiman A, Razi S, Alias HA

Biomed Res Int, 2014;2014:640321.
PMID: 24977154 DOI: 10.1155/2014/640321

This study compares energy expenditure (EE), gait parameters (GP), and level of fatigue (LOF) between 5-minute walking with sharp turning (ST) and corner turning (CT). Data were obtained from 29 community-dwelling elderly (mean age, 62.7 ± 3.54 years). For 5 minutes, in ST task, participants walked on a 3-meter pathway with 2 cones placed at each end (180° turning), while in CT task, participants walked on a 6-meter pathway with 4 cones placed at 4 corners (90° turning). The physiological cost index, pedometer, and 10-point Modified Borg Dyspnoea Scale were used to measure EE (beats/min), GP (no of steps), and LOF, respectively. Data were analyzed by using independent t-tests. EE during ST (0.62 ± 0.21 beats/min) was significantly higher than CT (0.48 ± 0.17 beats/min) (P < 0.05). GP (434 ± 92.93 steps) and LOF (1.40 ± 1.11) in ST were found to be lower compared to GP (463 ± 92.18 steps) and LOF (1.54 ± 1.34) in CT (All, P > 0.05). Higher EE in ST could be due to the difficulty in changing to a 180° direction, which may involve agility and different turning strategies (step-turn or pivot-turn) to adjust the posture carefully. In CT, participants could choose a step-turn strategy to change to a 90° direction, which was less challenging to postural control.

Matched MeSH terms: Physical Exertion/physiology*
Fulltext Effect of single-session aerobic exercise with varying intensities on lipid peroxidation and muscle-damage markers in sedentary males

Moflehi D, Kok LY, Tengku-Kamalden TF, Amri S

Glob J Health Sci, 2012 Jul;4(4):48-54.
PMID: 22980341 DOI: 10.5539/gjhs.v4n4p48

This study was conducted to evaluate the effect of the different intensity levels of single-session aerobic exercise on serum levels of lipid peroxidation and muscle damage markers in sedentary males.

Matched MeSH terms: Physical Exertion/physiology
Decay of heat acclimation during exercise in cold and exposure to cold environment

Saat M, Sirisinghe RG, Singh R, Tochihara Y

Eur J Appl Physiol, 2005 Oct;95(4):313-20.
PMID: 16151840

Sixteen male students exercised for 14 days (1 h/day) in the heat for heat acclimation (HA). During deacclimation (DA) one group exercised in the cold (EXG, n=8) for 60 min/day (morning) and was exposed to the cold for another hour (afternoon) for 14 days. The other group was exposed to the cold (EPG, n=8) for 1 h each in the morning and afternoon (Ta: 18.0 degrees C, RH: 58%) over the same period. All returned to exercise in the heat for reacclimation (RA) for 10 days. Subjects were tested on days 1, 16, 21, 32, 36 and 44 on a bicycle ergometer for 60 min at 60% of VO(2max) in the heat (Ta: 31.1 degrees C, RH: 70%). Rectal temperature (T (re)) and heart rate (HR) at 40 min of exercise were used to determine the decay/gain of HA, which was calculated using the formula described by Pandolf et al. (Ergonomics, 20:399-408, 1977). After HA (day 16) T (re) and HR decreased significantly. During DA, EXG showed decay in T (re) of 24 and 35% and HR of 29 and 35% on days 21 and 32, respectively. For EPG the corresponding decay was of 2 and 9% for T (re) and 17 and 17% for HR. After 10 days of RA, EXG showed gains of 11% in T (re) and 12% in HR, while EPG showed gains of 47% in T (re) and 38% in HR. In conclusion, EXG had greater decay during DA and lower gains in RA compared to EPG. However, the differences between groups were significant only for T (re) after 4 days of DA.

Matched MeSH terms: Physical Exertion*
The effects of modified exponential tapering technique on perceived exertion, heart rate, time trial performance, VO2max and power output among highly trained junior cyclists

Ishak A, Hashim HA, Krasilshchikov O

J Sports Med Phys Fitness, 2016 Sep;56(9):961-7.
PMID: 26004044

BACKGROUND: The present study investigated the effects of a 2-week modified exponential taper on physiological adaptation and time trial performance among junior cyclists.
METHODS: Participants (N.=27) with the mean age of 16.95±0.8 years, height of 165.6±6.1 cm and weight of 54.19±8.1 kg were matched into either modified exponential taper (N.=7), normal exponential taper (N.=7), or control (N.=7) groups using their initial VO2max values. Both experimental groups followed a 12-week progressive endurance training program and subsequently, a 2-week tapering phase. A simulated 20-km time trial performance along with VO2max, power output, heart rate and rating of perceived exertion were measured at baseline, pre and post-taper. One way ANOVA was used to analyze the difference between groups before the start of the intervention while mixed factorial ANOVA was used to analyze the difference between groups across measurement sessions. When homogeneity assumption was violated, the Greenhouse-Geisser Value was used for the corrected values of the degrees of freedom for the within subject factor the analysis.
RESULTS: Significant interactions between experimental groups and testing sessions were found in VO2max (F=6.67, df=4, P<0.05), power output (F=5.02, df=4, P<0.05), heart rate (F=10.87, df=2.51, P<0.05) rating of perceived exertion (F=13.04, df=4, P<0.05) and 20KM time trial (F=4.64, df=2.63, P<0.05). Post-hoc analysis revealed that both types of taper exhibited positive effects compared to the non-taper condition in the measured performance markers at post-taper while no different were found between the two taper groups.
CONCLUSIONS: It was concluded that both taper protocols successfully inducing physiological adaptations among the junior cyclists by reducing the volume and maintaining the intensity of training.

Matched MeSH terms: Physical Exertion/physiology*
Physiological adaptations to thermal stress in tropical Asians

Duncan MT, Horvath SM

Eur J Appl Physiol Occup Physiol, 1988;57(5):540-4.
PMID: 3396569

Young sedentary adult males of Malay, Indian, and Chinese origin who had established continuous residence in tropical Malaysia and presumed to be naturally acclimatized to heat, were studied to evaluate their physiological responses to a standard heat stress test. The Malay and Indian races have evolved in hot and humid geographical zones, whereas the Chinese originated from a temperate area. Subjects exercised at 50% VO2max alternating 18 minutes walking and 2 min rest during a 2-h exposure to an ambient of 34.9 degrees C dry bulb and 32.1 degrees C wet bulb. Heart rates, core and skin temperatures, sweat rates, and oxygen uptakes were measured during the heat exposure. The subjects of Malay origin exhibited the least circulatory stress of the three ethnic groups. The data obtained on these long-term residents of a hot-wet climate and who were considered acclimatized to this environment were compared to experimental data obtained by other investigators and other ethnic groups.

Matched MeSH terms: Physical Exertion*
Fulltext Cardiovascular and metabolic responses to isometric exercise of athletes and non-athletes

Rajikin MH

Med J Malaysia, 1980 Sep;35(1):46-52.
PMID: 6973059

Seven non-anthletes [21-26 yrs] and five athletes [23-29 yrs] have participated in the study of cardiovascular and metabolic responses to 15 minutes isometric leg exercise at 15% of each of their maximal voluntary contraction force [MVC]. Oxygen consumption [V02 ]. heart rate [HR] and blood pressure (BP]. were measured during resting. exercise and recovery! periods. The results show that there were a significant increase in V02. HR and BP of the two groups studied during exercise, but no significant difference between groups has been found. This study indicates that although cardiovascular response between the rwo groups was not significantly different, 15 minutes isometric leg exercise at 15% MVC has challenged this system in a such a way to fulfill the metabolic requirement of the
working muscle ill both groups. This finding was
discussed in light of the available literatures.

Matched MeSH terms: Physical Exertion*
Aerobic work capacity in young, untrained Asian men

Duncan M

Q J Exp Physiol Cogn Med Sci, 1972 Jul;57(3):247-56.
PMID: 4483129
Matched MeSH terms: Physical Exertion*
Perceptual and Cardiorespiratory Responses to High-Intensity Interval Exercise in Adolescents: Does Work Intensity Matter?

Malik AA, Williams CA, Weston KL, Barker AR

J Sports Sci Med, 2019 03;18(1):1-12.
PMID: 30787646

High-intensity interval exercise (HIIE) may not elicit prominent unpleasant feelings even with elevated perceived exertion and physiological stress in adolescents. However, the influence of different HIIE work intensities on the affective experience and cardiorespiratory responses is unknown. This study examined the acute affective, enjoyment, perceived exertion and cardiorespiratory responses to HIIE with different work intensities in adolescents. Participants (n = 16; 8 boys; age 12.0 ± 0.3 years) performed, on separate days, HIIE conditions consisting of 8 x 1-minute work-intervals at 70%, 85%, or 100% peak power separated by 75 seconds recovery at 20 W. Affect, enjoyment and rating of perceived exertion (RPE) were recorded before, during, and after HIIE. Heart rate (HR) and oxygen uptake were collected during HIIE. Affect declined in all conditions (p < 0.01) but 100%HIIE elicited significantly lower affect than 70%HIIE and 85%HIIE at work-interval 8 (all p < 0.02, ES > 1.74; 70%HIIE = 2.5 ± 0.8; 85%HIIE = 1.1 ± 1.5; 100%HIIE = -1.5 ± 1.4 on feeling scale). Similar enjoyment was evident during and after all conditions (all p > 0.44). RPE was significantly higher during 100%HIIE than 70%HIIE and 85%HIIE across all work-intervals (all p < 0.01, ES > 1.56). The majority of the participants attained ≥90%HRmax during 85%HIIE (87%) and 100%HIIE (100%), but not during 70%HIIE (6%). Affect responses during HIIE are dependent on the intensity of the work-interval and are not entirely negative (unpleasant feelings). Despite similar enjoyment, positive affect experienced during 70%HIIE and 85%HIIE could serve as a strategy to encourage exercise adoption and adherence in adolescents, but only 85%HIIE elicits sufficient HR stimulus to facilitate potential health benefits.

Matched MeSH terms: Physical Exertion/physiology*

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