Exercise performance in acute and chronic cold exposure

Wakabayashi, Hisao; Oksa, Juha; Tipton, Michael J.

doi:10.7600/jpfsm.4.177

Cited by 23 publications

(33 citation statements)

References 91 publications

(117 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As indicated in previous research, the lower motor performance at 16°C in contrast to 26°C and 36°C suggests that cold exposure could undermine manual motor performance. This could be attributed to low skin and tendon temperatures and slow muscle conduction velocity in cold environments . Therefore, thermal insulation from clothing might account for the significantly higher performance during the 16°C/0.9 clo condition than the 16°C/0.3 clo condition.…”

Section: Discussionsupporting

confidence: 90%

“…This could be attributed to low skin and tendon temperatures and slow muscle conduction velocity in cold environments. 50 Therefore, thermal insulation from clothing might account for the significantly higher performance during the 16°C/0.9 clo condition than the 16°C/0.3 clo condition. Moreover, clothing effect was also indicated in the changing performance trend and significant temperature differences existed at 0.3 clo than 0.9 clo during the first post-test ( Figure 5(B)).…”

Section: Pre-room: Nsmentioning

confidence: 99%

See 1 more Smart Citation

Productivity and physiological responses during exposure to varying air temperatures and clothing conditions

Maeda

2019

Indoor Air

View full text Add to dashboard Cite

This study assessed the effects of clothing and air temperature combinations on workplace productivity and physiological response. Ten male Japanese subjects were exposed to six combinations of clothing (0.3 clo and 0.9 clo) and air temperature (16°C, 26°C, and 36°C) during which cognitive performance (Bourdon and calculation tests), manual motor performance (finger‐tapping test), and physiological responses (heart rate, blood pressure, and skin and oral temperatures) were measured. Both cold exposure and lower clothing levels likely increased the Bourdon test performance. Calculation test performance tended to be affected by exposure to cold or neutral temperatures at the beginning of the test. Cold exposure undermined manual motor performance (especially when combined with fewer clothing items) while heat exposure significantly increased heart rate. Both cold exposure and higher clothing level during heat exposure increased blood pressure. Body temperature, particularly mean skin temperature, increased with higher air temperature and was significantly influenced by clothing insulation during cold exposure. These results provide novel evidence for the effects of clothing and air temperature (particularly cold) on human productivity and physiological responses in humans.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Pre-room: Nsmentioning

confidence: 99%

Productivity and physiological responses during exposure to varying air temperatures and clothing conditions

Maeda

2019

Indoor Air

View full text Add to dashboard Cite

show abstract

“…There have been several review articles summarizing the human performance and physiological responses in cold environment [14–17]. The electromyography (EMG) technique has been often used for assessing the neuromuscular function during muscle activity in cold.…”

Section: Introductionmentioning

confidence: 99%

Neuromuscular function during knee extension exercise after cold water immersion

Wakabayashi

Wijayanto

Tochihara

2017

J Physiol Anthropol

Self Cite

View full text Add to dashboard Cite

BackgroundHuman adaptability to cold environment has been focused on in the physiological anthropology and related research area. Concerning the human acclimatization process in the natural climate, it is necessary to conduct a research assessing comprehensive effect of cold environment and physical activities in cold. This study investigated the effect of cold water immersion on the exercise performance and neuromuscular function during maximal and submaximal isometric knee extension.MethodsNine healthy males participated in this study. They performed maximal and submaximal (20, 40, and 60% maximal load) isometric knee extension pre- and post-immersion in 23, 26, and 34 °C water. The muscle activity of the rectus femoris (RF) and vastus lateralis (VL) was measured using surface electromyography (EMG). The percentages of the maximum voluntary contraction (%MVC) and mean power frequency (MPF) of EMG data were analyzed.ResultsThe post-immersion maximal force was significantly lower in 23 °C than in 26 and 34 °C conditions (P < 0.05). The post-immersion %MVC of RF was significantly higher than pre-immersion during 60% maximal exercise in 23 and 26 °C conditions (P < 0.05). In the VL, the post-immersion %MVC was significantly higher than pre-immersion in 23 and 26 °C conditions during 20% maximal exercise and in 26 °C at 40 and 60% maximal intensities (P < 0.05). The post-immersion %MVC of VL was significantly higher in 26 °C than in 34 °C at 20 and 60% maximal load (P < 0.05). The post-immersion MPF of RF during 20% maximal intensity was significantly lower in 23 °C than in 26 and 34 °C conditions (P < 0.05), and significantly different between three water temperature conditions at 40 and 60% maximal intensities (P < 0.05). The post-immersion MPF of VL during three submaximal trials were significantly lower in 23 and 26 °C than in 34 °C conditions (P < 0.05).ConclusionsThe lower shift of EMG frequency would be connected with the decrease in the nerve and muscle fibers conduction velocity. To compensate for the impairment of each muscle fibers function, more muscle fibers might be recruited to maintain the working load. This might result in the greater amplitude of EMG after the cold immersion.

show abstract

“…A human's ability to sustain mechanical function -muscular force and power -over time is modulated by numerous environmental factors, including both the oxygen (O 2 ) availability and the climate (3,42,69). While these are widely studied as independent stressors, many real life applications generate hypoxic and thermal stressors in combination e.g.…”

mentioning

confidence: 99%

Interaction between environmental temperature and hypoxia on central and peripheral fatigue during high-intensity dynamic knee extension

Lloyd

Raccuglia

Havenith

2016

Journal of Applied Physiology

View full text Add to dashboard Cite

This study investigated causative factors behind the expression of different interaction types during exposure to multistressor environments. Neuromuscular fatigue rates and time to exhaustion (TTE) were investigated in active men (n = 9) exposed to three climates [5 °C, 50% relative humidity (rh); 23 °C, 50% rh; and 42 °C, 70% rh] at two inspired oxygen fractions (0.209 and 0.125 FiO2; equivalent attitude = 4,100 m). After a 40-min rest in the three climatic conditions, participants performed constant-workload (high intensity) knee extension exercise until exhaustion, with brief assessments of neuromuscular function every 110 s. Independent exposure to cold, heat, and hypoxia significantly (P < 0.01) reduced TTE from thermoneutral normoxia (reductions of 190, 405, and 505 s from 915 s, respectively). The TTE decrease was consistent with a faster rate of peripheral fatigue development (P < 0.01) compared with thermoneutral normoxia (increase of 1.6, 3.1, and 4.9%/min from 4.1%/min, respectively). Combined exposure to hypoxic-cold resulted in an even greater TTE reduction (-589 s), likely due to an increase in the rate of peripheral fatigue development (increased by 7.6%/min), but this was without significant interaction between stressors (P > 0.198). In contrast, combined exposure to hypoxic heat reduced TTE by 609 s, showing a significant antagonistic interaction (P = 0.003) similarly supported by an increased rate of peripheral fatigue development (which increased by 8.3%/min). A small decline (<0.4%/min) in voluntary muscle activation was observed only in thermoneutral normoxia. In conclusion, interaction type is influenced by the impact magnitude of the effect of the individual stressors' effect on exercise capacity, whereby the greater the effect of stressors, the greater the probability that one stressor will be abolished by the other. This indicates that humans respond to severe and simultaneous physiological strains on the basis of a worst-strain-takes-precedence principle.

show abstract

Exercise performance in acute and chronic cold exposure

Cited by 23 publications

References 91 publications

Productivity and physiological responses during exposure to varying air temperatures and clothing conditions

Productivity and physiological responses during exposure to varying air temperatures and clothing conditions

Neuromuscular function during knee extension exercise after cold water immersion

Interaction between environmental temperature and hypoxia on central and peripheral fatigue during high-intensity dynamic knee extension

Contact Info

Product

Resources

About