Human thermoregulatory responses to cold air are altered by repeated cold water immersion

1986 ◽  
Vol 60 (5) ◽  
pp. 1542-1548 ◽  
Author(s):  
A. J. Young ◽  
S. R. Muza ◽  
M. N. Sawka ◽  
R. R. Gonzalez ◽  
K. B. Pandolf
Keyword(s):  
Cold Acclimation ◽  
Cold Water ◽  
Water Immersion ◽  
Stress Test ◽  
Cold Water Immersion ◽  
Plasma Norepinephrine ◽  
Cold Air ◽  
Thermoregulatory Responses ◽  
Before And After ◽  
C 30

The effects of repeated cold water immersion on thermoregulatory responses to cold air were studied in seven males. A cold air stress test (CAST) was performed before and after completion of an acclimation program consisting of daily 90-min cold (18 degrees C) water immersion, repeated 5 times/wk for 5 consecutive wk. The CAST consisted of resting 30 min in a comfortable [24 degrees C, 30% relative humidity (rh)] environment followed by 90 min in cold (5 degrees C, 30% rh) air. Pre- and postacclimation, metabolism (M) increased (P less than 0.01) by 85% during the first 10 min of CAST and thereafter rose slowly. After acclimation, M was lower (P less than 0.02) at 10 min of CAST compared with before, but by 30 min M was the same. Therefore, shivering onset may have been delayed following acclimation. After acclimation, rectal temperature (Tre) was lower (P less than 0.01) before and during CAST, and the drop in Tre during CAST was greater (P less than 0.01) than before. Mean weighted skin temperature (Tsk) was lower (P less than 0.01) following acclimation than before, and acclimation resulted in a larger (P less than 0.02) Tre-to-Tsk gradient. Plasma norepinephrine increased during both CAST (P less than 0.002), but the increase was larger (P less than 0.004) following acclimation. These findings suggest that repeated cold water immersion stimulates development of true cold acclimation in humans as opposed to habituation. The cold acclimation produced appears to be of the insulative type.

scholarly journals EFEKTIVITAS COLD WATER IMMERSION SUHU 15° C DAN 25° C TERHADAP PERBAIKAN DAYA TAHAN DAN PERSEPSI NYERI OTOT TUNGKAI PADA PEMAIN SEPAK BOLA USIA DINI

MEDIKORA ◽  
2019 ◽  
Vol 18 (1) ◽  
pp. 12-16
Author(s):  
Muhammad Rifqi Fatoni ◽  
Sigit Nugroho
Keyword(s):  
Pain Perception ◽  
Cold Water ◽  
Water Immersion ◽  
Cold Water Immersion ◽  
Wilcoxon Test ◽  
Rank Test ◽  
Muscle Endurance ◽  
Before And After ◽  
Post Test ◽  
Signed Rank Test

Akumulasi pertandingan dengan masa pemulihan yang singkat menyebabkan kelelahan, kerusakan dan inflamasi otot yang dapat menurunkan daya tahan otot dan meningkatkan resiko cedera. Pada keadaan cedera akut, penggunaan terapi dingin dapat mencegah kerusakan jaringan yang lebih luas. Penelitian ini bertujuan untuk mengetahui efektivitas Cold Water Immersion (CWI) suhu 15°C dan 25°C terhadap daya tahan dan persepsi nyeri otot tungkai pada pemain sepak bola usia dini. Desain yang digunakan dalam penelitian ini adalah eksperimen semu dengan pola Two Group Pretest-Posttest. Instrumen yang digunakan adalah tes dan pengukuran nyeri dan daya tahan otot tungkai. Subjek penelitian ini adalah atlet sepak bola Sekolah Sepak Bola (SSB) KKK Klajuaran usia 9-11 tahun. Teknik sampel menggunakan quota sampling dengan subyek sebanyak 14 orang. Subyek dibagi menjadi dua kelompok yaitu, perlakuan CWI 15°C (G15) dan CWI suhu 25°C (G25). Data pretest pada kedua perlakuan dan data post test kedua perlakuan diuji dengan uji Mann Whitney. Daya tahan otot dan persepsi nyeri sebelum dan sesudah perlakuan pada masing masing kelompok terkumpul dianalisis secara deskriptif dan diuji dengan analisis Wilcoxon Signed Rank Test. Uji efektivitas dihitung dengan membandingkan selisih data post test dan pretest terhadap data pretest. Tidak ditemukan perbedaan daya tahan otot dan persepsi nyeri sebelum dan sesudah perlakuan antara kedua kelompok perlakuan. Pada kelompok G15 terjadi penurunan persepsi nyeri sebesar 55% dengan uji wilcoxon dengan nilai p = 0,018, akan tetapi tidak ditemukan perubahan daya tahan otot setelah perlakuan. Hasil yang sama ditemukan pada kelompok G25 dimana terdapat penurunan persepsi nyeri sebesar 58% dengan uji wilcoxon dengan p = 0,018 serta tidak ditemukan perubahan daya tahan otot tungkai. Dapat disimpulkan bahwa perlakuan CWI 15°C dan 25°C dapat menurunkan nyeri tapi tidak mempengaruhi daya tahan otot. Tidak terdapat perbedaan efektivitas kedua jenis perlakuan tersebut dalam menurunkan persepsi nyeri dan meningkatkan daya tahan otot. EFFECTIVENESS OF COLD WATER IMMERSION TEMPERATURE OF 15 ° C AND 25° C AGAINST IMPROVEMENT IN ENDURANCE AND PERCEPTION OF LEG MUSCLE PAIN IN EARLY AGE FOOTBALL PLAYERSAbstractAccumulation of matches with a short recovery period causes fatigue, damage and inflammation of the muscles which can reduce muscle endurance and increase the risk of injury. In the case of acute injury, the use of cold therapy can prevent damage to broader tissue. This study aims to determine the effectiveness of Cold Water Immersion (CWI) temperatures of 15 ° C and 25 ° C on the endurance and perception of leg muscle pain in early age soccer players.The design used in this study was quasi-experimental with Two Group Pretest-Posttest patterns. The instrument used was a test and measurement of pain and endurance of leg muscles. The subjects of this study were the soccer athletes of Klajuaran KKK Soccer School (SSB) aged 9-11 years. The sampling technique uses quota sampling with subjects as many as 14 people. The subjects were divided into two groups namely, 15 ° C (G15) CWI treatment and 25 ° C (G25) CWI treatment. Pretest data on both treatments and post-test data on both treatments were tested with the Mann Whitney test. Muscle endurance and pain perception before and after treatment in each group collected were analyzed descriptively and tested with the Wilcoxon Signed Rank Test analysis. The effectiveness test is calculated by comparing the difference between the post test and pretest data against the pretest data. There were no differences in muscle endurance and pain perception before and after treatment between the two treatment groups. In the G15 group there was a decrease in pain perception by 55% with the Wilcoxon test with a value of p = 0.018, but there was no change in muscle endurance after treatment. Similar results were found in the G25 group where there was a decrease in pain perception by 58% with the Wilcoxon test with p = 0.018 and no changes in endurance of leg muscles were found. It can be concluded that the CWI treatment of 15 ° C and 25 ° C can reduce pain but does not affect muscular endurance. There is no difference in the effectiveness of the two types of treatment in reducing pain perception and increasing muscle endurance.

scholarly journals Cold water immersion attenuates anabolic signaling and skeletal muscle fiber hypertrophy, but not strength gain, following whole-body resistance training

2019 ◽  
Vol 127 (5) ◽  
pp. 1403-1418 ◽  
Author(s):  
Jackson J. Fyfe ◽  
James R. Broatch ◽  
Adam J. Trewin ◽  
Erik D. Hanson ◽  
Christos K. Argus ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Resistance Training ◽  
Protein Content ◽  
Muscle Fiber ◽  
Cold Water ◽  
Water Immersion ◽  
Cold Water Immersion ◽  
Post Exercise ◽  
Leg Press ◽  
Before And After

We determined the effects of cold water immersion (CWI) on long-term adaptations and post-exercise molecular responses in skeletal muscle before and after resistance training. Sixteen men (22.9 ± 4.6 y; 85.1 ± 17.9 kg; mean ± SD) performed resistance training (3 day/wk) for 7 wk, with each session followed by either CWI [15 min at 10°C, CWI (COLD) group, n = 8] or passive recovery (15 min at 23°C, control group, n = 8). Exercise performance [one-repetition maximum (1-RM) leg press and bench press, countermovement jump, squat jump, and ballistic push-up], body composition (dual X-ray absorptiometry), and post-exercise (i.e., +1 and +48 h) molecular responses were assessed before and after training. Improvements in 1-RM leg press were similar between groups [130 ± 69 kg, pooled effect size (ES): 1.53 ± 90% confidence interval (CI) 0.49], whereas increases in type II muscle fiber cross-sectional area were attenuated with CWI (−1,959 ± 1,675 µM2 ; ES: −1.37 ± 0.99). Post-exercise mechanistic target of rapamycin complex 1 signaling (rps6 phosphorylation) was blunted for COLD at post-training (POST) +1 h (−0.4-fold, ES: −0.69 ± 0.86) and POST +48 h (−0.2-fold, ES: −1.33 ± 0.82), whereas basal protein degradation markers (FOX-O1 protein content) were increased (1.3-fold, ES: 2.17 ± 2.22). Training-induced increases in heat shock protein (HSP) 27 protein content were attenuated for COLD (−0.8-fold, ES: −0.94 ± 0.82), which also reduced total HSP72 protein content (−0.7-fold, ES: −0.79 ± 0.57). CWI blunted resistance training-induced muscle fiber hypertrophy, but not maximal strength, potentially via reduced skeletal muscle protein anabolism and increased catabolism. Post-exercise CWI should therefore be avoided if muscle hypertrophy is desired. NEW & NOTEWORTHY This study adds to existing evidence that post-exercise cold water immersion attenuates muscle fiber growth with resistance training, which is potentially mediated by attenuated post-exercise increases in markers of skeletal muscle anabolism coupled with increased catabolism and suggests that blunted muscle fiber growth with cold water immersion does not necessarily translate to impaired strength development.

Effect of cold acclimation on neuromuscular function of the hand

2006 ◽  
Vol 31 (4) ◽  
pp. 480-481
Author(s):  
Carla L.M. Geurts
Keyword(s):  
Cold Stress ◽  
Cold Acclimation ◽  
Cold Exposure ◽  
Force Control ◽  
Cold Water ◽  
Water Immersion ◽  
Temperature Response ◽  
Neuromuscular Function ◽  
Cold Water Immersion ◽  
Hand Temperature

The research in this thesis investigated the effects of cold stress on neuromuscular function with the main focus on cold acclimation. In total, 6 studies, 1 field study and 5 experiments, were conducted. The field study showed that during manual work in cold weather, finger and hand temperature can drop to levels that may impair manual function. The first 2 experiments were conducted to investigate the effect of acute local cold stress on force control and to investigate the effect of cold-induced vasodilatation (CIVD) on neuromuscular function. In experiment 1, it was found that cooling of the hand in 10 °C cold water for 10 min did not improve force control, although neuromuscular function was significantly impaired after cooling. In experiment 2, cold-induced vasodilatation, occurring after 20 min of 8 °C cold-water immersion of the hand, was confined to the finger tip and had no effect on the temperature of the first dorsal interosseus (FDI) muscle or its neuromuscular function. A series of cold acclimation studies was conducted to investigate the effect of repeated cold-water hand immersions on neuromuscular function. In these experiments, neuromuscular function was tested before and after 2–3 weeks of daily hand immersion in 8 °C cold water for 30 min. In experiment 3, it was found that 3 weeks of cold-water immersion resulted in a decrease in minimum and mean index finger temperature and CIVD was attenuated. Neuromuscular function was not affected by this change in temperature response. In experiment 4, one hand was exposed daily to cold water and compared with the opposite control hand. Blood plasma catecholamine concentrations were increased after 2 weeks in the cold-exposed hand, but no changes in temperature response or neuromuscular function were found after repeated cold exposure. Thermal comfort after 30 min of cold-water immersion significantly improved after repeated cold exposure causing a discrepancy between actual and perceived temperature and it was suggested that this may impose a greater risk of cold injury owing to a change in behavioural thermoregulation. In the last experiment, core temperature was elevated by bicycling at a submaximal level during the cold hand immersion. Exercise had a direct effect on the temperature response during cold-water immersion, decreasing the minimum FDI temperature and slowing down the deteriorating effect of cold on neuromuscular function; however, exercise showed was no effect on local cold acclimation. It is concluded that local repeated cold exposures may improve finger and hand temperature and subjective thermal ratings, but that these changes are too small to improve neuromuscular function. The best remedy to maintain manual function is to limit or avoid cold stress as much as possible. If sufficient protection of the hands is impossible, core heating through exercise or passive heating may be a solution.

Effects of Body Composition on Thermoregulatory Responses During Cold Water Immersion in Healthy Males

2008 ◽  
Vol 40 (Supplement) ◽  
pp. S228
Author(s):  
Greg Farnell ◽  
Katherine Pierce ◽  
Rob Demes ◽  
Tiffany Collinsworth ◽  
Edward J. Ryan ◽  
...  
Keyword(s):  
Body Composition ◽  
Cold Water ◽  
Water Immersion ◽  
Cold Water Immersion ◽  
Thermoregulatory Responses ◽  
Healthy Males

Athletic Trainers' Attitudes and Perceptions Regarding Exertional Heat Stroke Before and After an Educational Intervention

2017 ◽  
Vol 12 (3) ◽  
pp. 179-187 ◽  
Author(s):  
Kristen Couper Schellhase ◽  
Jennifer Plant ◽  
Stephanie M. Mazerolle
Keyword(s):  
Educational Intervention ◽  
Cold Water ◽  
Core Body Temperature ◽  
Athletic Trainers ◽  
Water Immersion ◽  
Heat Stroke ◽  
Cold Water Immersion ◽  
Attitudes And Perceptions ◽  
Before And After ◽  
Core Body

Context: Death from exertional heat stroke (EHS) is preventable when evidence-based guidelines are followed. The assessment of core body temperature using rectal thermometry and the treatment of cold-water immersion for EHS has been established as the standard of care; however, rectal thermometry is still controversial. Athletic trainers (ATs) may lack knowledge and comfort with this skill, which could impact implementation. Objective: Examine ATs' current practices, attitudes, and perceptions regarding EHS before and after an educational intervention. Design: Prequantitative/postquantitative experimental. Setting: Classroom. Patients or Other Participants: Twenty-five ATs in various athletic training settings. Intervention(s): Educational intervention designed to increase knowledge and address negative attitudes and perceptions regarding EHS evaluation and treatment. Main Outcome Measure(s): Attitude and perception scores. Results: Prior to the educational intervention, most ATs (86.9%, 20/23) reported that they use methods other than rectal thermometry to evaluate EHS. Of those who did not use rectal thermometry, their reasons included: lack of equipment/budget, concerns about liability/lack of consent (especially when dealing with minors), lack of training, and/or concerns about the privacy, embarrassment, compliance of the athlete. Cold-water immersion was chosen as the definitive method of cooling an athlete by only 41.7% (n = 10) of participants. Following the educational intervention, attitudes toward the use of rectal temperature to assess core body temperature (t[24] = 8.663, P < .001) and cold-water immersion treatment for EHS (t[24] = 4.187, P < .001) were significantly improved. However, while attitudes toward the use of other “cold” methods to treat EHS were not significantly changed (t[24] = 1.684, P = .105), perceptions regarding nonexertional influences on EHS were significantly improved (t[24] = 1.684, P = .105). Conclusions: This study demonstrated that a 3-hour educational intervention can improve attitudes and perceptions regarding the assessment and treatment of EHS in the short term. It is important that educational interventions use best-practice continuing education methods and include special attention to the barriers to evidence-based practice.

scholarly journals Seven days of cold acclimation substantially reduces shivering intensity and increases nonshivering thermogenesis in adult humans

2019 ◽  
Vol 126 (6) ◽  
pp. 1598-1606 ◽  
Author(s):  
Kyle Gordon ◽  
Denis P. Blondin ◽  
Brian J. Friesen ◽  
Hans Christian Tingelstad ◽  
Glen P. Kenny ◽  
...  
Keyword(s):  
Cold Acclimation ◽  
Core Temperature ◽  
Heat Production ◽  
Cold Exposure ◽  
Cold Water ◽  
Water Immersion ◽  
Cold Water Immersion ◽  
Metabolic Changes ◽  
Whole Body ◽  
Nonshivering Thermogenesis

Daily compensable cold exposure in humans reduces shivering by ~20% without changing total heat production, partly by increasing brown adipose tissue thermogenic capacity and activity. Although acclimation and acclimatization studies have long suggested that daily reductions in core temperature are essential to elicit significant metabolic changes in response to repeated cold exposure, this has never directly been demonstrated. The aim of the present study is to determine whether daily cold-water immersion, resulting in a significant fall in core temperature, can further reduce shivering intensity during mild acute cold exposure. Seven men underwent 1 h of daily cold-water immersion (14°C) for seven consecutive days. Immediately before and following the acclimation protocol, participants underwent a mild cold exposure using a novel skin temperature clamping cold exposure protocol to elicit the same thermogenic rate between trials. Metabolic heat production, shivering intensity, muscle recruitment pattern, and thermal sensation were measured throughout these experimental sessions. Uncompensable cold acclimation reduced total shivering intensity by 36% ( P = 0.003), without affecting whole body heat production, double what was previously shown from a 4-wk mild acclimation. This implies that nonshivering thermogenesis increased to supplement the reduction in the thermogenic contribution of shivering. As fuel selection did not change following the 7-day cold acclimation, we suggest that the nonshivering mechanism recruited must rely on a similar fuel mixture to produce this heat. The more significant reductions in shivering intensity compared with a longer mild cold acclimation suggest important differential metabolic responses, resulting from an uncompensable compared with compensable cold acclimation. NEW & NOTEWORTHY Several decades of research have been dedicated to reducing the presence of shivering during cold exposure. The present study aims to determine whether as little as seven consecutive days of cold-water immersion is sufficient to reduce shivering and increase nonshivering thermogenesis. We provide evidence that whole body nonshivering thermogenesis can be increased to offset a reduction in shivering activity to maintain endogenous heat production. This demonstrates that short, but intense cold stimulation can elicit rapid metabolic changes in humans, thereby improving our comfort and ability to perform various motor tasks in the cold. Further research is required to determine the nonshivering processes that are upregulated within this short time period.

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