Influence of mental workload on muscle endurance, fatigue, and recovery during intermittent static work

Mehta, Ranjana K.; Agnew, Michael J.

doi:10.1007/s00421-011-2264-x

Cited by 171 publications

(124 citation statements)

References 56 publications

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“…Alternatively, the stressor-induced fatigability may only be relevant during low-force contractions. Accordingly, cognitive demand influenced the fatigability of the shoulder abductors during a moderate intensity but not in a highintensity, intermittent contraction in young adults [18].…”

Section: Discussionmentioning

confidence: 94%

Sex Differences in Arm Muscle Fatigability With Cognitive Demand in Older Adults

Pereira

Spears

Schlinder-Delap

et al. 2015

Clinical Orthopaedics &Amp; Related Research

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Background Muscle fatigability can increase when a stressful, cognitively demanding task is imposed during a low-force fatiguing contraction with the arm muscles, especially in women. Whether this occurs among older adults ([ 60 years) is currently unknown. Questions/purposes We aimed to determine if higher cognitive demands, stratified by sex, increased fatigability in older adults ([ 60 years). Secondarily, we assessed if varying cognitive demand resulted in decreased steadiness and was explained by anxiety or cortisol levels.Methods Seventeen older women (70 ± 6 years) and 13 older men (71 ± 5 years) performed a sustained, isometric, fatiguing contraction at 20% of maximal voluntary contraction until task failure during three sessions: high cognitive demand (high CD = mental subtraction by 13); low cognitive demand (low CD = mental subtraction by 1); and control (no subtraction). Results Fatigability was greater when high and low CD were performed during the fatiguing contraction for the women but not for the men. In women, time to failure with high CD was 16 ± 8 minutes and with low CD was 17 ± 4 minutes, both of which were shorter than time to failure in control contractions (21 ± 7 minutes; high CD mean difference: 5 minutes [95% confidence interval {CI}, 0.78-9.89], p = 0.02; low CD mean difference: 4 minutes [95% CI, 0.57-7.31], p = 0.03). However, in men, no differences were detected in time to failure with cognitive demand (control: 13 ± 5 minutes; high CD mean difference: À0.09 minutes [95% CI, À2.8 to 2.7], p = 1.00; low CD mean difference: 0.75 minutes [95% CI, À1.1 to 2.6], p = 0.85). Steadiness decreased (force fluctuations increased) more during high CD than control. Elevated anxiety, mean arterial pressure, and salivary cortisol levels in both men and women did not explain the greater fatigability during high CD. Conclusions Older women but not men showed marked increases in fatigability when low or high CD was imposed

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Section: Discussionmentioning

confidence: 94%

Sex Differences in Arm Muscle Fatigability With Cognitive Demand in Older Adults

Pereira

Spears

Schlinder-Delap

et al. 2015

Clinical Orthopaedics &Amp; Related Research

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“…Fatigue is a symptom of the body not being able to sustain a given level of activity. Fatigue has a negative effect on various aspects of human life including physical strength, work performance, domesticity and social life (1,2).…”

Section: Introductionmentioning

confidence: 99%

Deep sea water improves exercise and inhibits oxidative stress in a physical fatigue mouse model

Fan¹,

Tan²,

Yue³

et al. 2016

Biomedical Reports

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Abstract. Physical fatigue is extremely common and occurs daily, and is considered to be associated with oxidative stress. The diverse functions of deep sea water (DSW) have recently gained increasing attention. Previous studies have emphasized the anti-fatigue effect of DSW, but the intrinsic mechanism behind the effect remains to be elucidated. In the imprinting control region (ICR) mice model, DSW delayed the exhaustive swimming time. In addition, DSW decreased the area under the blood lactate (BLA) curve, which was associated with the area under the BLA curve of pre-swimming, post-swimming and post-rest. Furthermore, DSW reduced the basal levels of malondialdehyde and the post-swimming concentration of blood urea nitrogen, lactate dehydrogenase and creatine kinase after swimming, along with an increase in the normal level of antioxidant enzyme activity such as superoxide dismutase and glutathione peroxidase. However, no significant effect on body weight, hepatic glycogen and muscle glycogen was observed between any group. In conclusion, DSW can improve the athletic ability and alleviate physical fatigue of ICR mice. This effect is achieved by enhancing the antioxidant capacity.

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“…During physical exercise, the contracting muscles generate force/power, metabolites, and heat, which ultimately induce fatigue and exhaustion (4). Fatigue is categorized as physical or emotional exhaustion resulting in negative effects on physical endurance capacity, work performance, and exercise intensity.…”

Section: Introductionmentioning

confidence: 99%

Hot Water Extract of Leather Carp (Cyprinus carpio nudus) Improves Exercise Performance in Mice

Lee

Harwanto

Park

et al. 2015

JFN

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ABSTRACT:The hot water extract of leather carp (Cyprinus carpio nudus) has been used as a nourishing tonic soup and as an aid for recovery from physical fatigue. In this study, we investigated the effect of leather carp extract on exercise performance in mice. Swimming endurance and forelimb grip strength were assessed following oral administration of the extract (once per day for 7 days) at a dose of 0.5 mg/10 L/g body weight. After 7 days, mice given the leather carp extract had significantly greater swimming endurance [105±18 s (P＜0.05); 52% longer than day 0] and forelimb grip strength [1.18±0.05 Newton (P＜0.01); 17% greater than day 0]. The extract increased muscle mass, but had little effect on body weight. Following the swimming exercise, blood glucose, glutathione peroxidase, and superoxide dismutase levels in extract-fed mice were significantly higher (145%, 131%, and 106%, respectively) than in the saline control group. Blood levels of high-density lipoprotein cholesterol were also significantly increased (128%) in mice given the extract compared to the controls. These results suggest that leather carp extract can improve physical exercise performance and prevent oxidative stress caused by exhaustive workouts.

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Influence of mental workload on muscle endurance, fatigue, and recovery during intermittent static work

Cited by 171 publications

References 56 publications

Sex Differences in Arm Muscle Fatigability With Cognitive Demand in Older Adults

Sex Differences in Arm Muscle Fatigability With Cognitive Demand in Older Adults

Deep sea water improves exercise and inhibits oxidative stress in a physical fatigue mouse model

Hot Water Extract of Leather Carp (Cyprinus carpio nudus) Improves Exercise Performance in Mice

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