Cooling Vest Research Articles

Acute Effects of Wearing a Cooling Vest after High-Intensity Running and at Rest on Energy Intake and Appetite in Young Men.

Body cooling during and after exercise stimulates energy intake (EI). Cooling vests can also reasonably decrease body temperature under various sport occasions. This study examined the acute effects of wearing a cooling vest on EI and appetite after exercise and rest. Fifteen healthy young men underwent four trials randomly in a thermoneutral room (~24 °C, ~40% humidity). In two exercise trials, participants performed a 60-minute run at 75% of maximum oxygen uptake and wore a cooling vest (ExC) or thermoneutral vest (ExN) from 1030-1130 h. In two resting trials, participants rested for 60 minutes and wore a cooling vest (RC) or a thermoneutral vest (RN) from 1030-1130 h. From 1130 h, participants consumed a buffet meal until satiety. EI was calculated from the buffet meal. Skin and rectal temperatures were assessed between 0930 h and 1130 h. EI was significantly higher in the ExC trial (1740 ± 642 kcal) than in the ExN trial (1584 ± 604 kcal) and higher in the RC trial (1879 ± 806 kcal) than in the RN trial (1726 ± 806 kcal). Hot foods consumption was significantly higher in the ExC trial than in the ExN trial and higher in the RC trial than in the RN trial. Subjective hunger was significantly higher in the ExC trial than in the ExN trial. Lower rectal temperatures were associated with higher relative EI (β = -8.871, P < 0.001).Conclusions: Wearing a cooling vest increased EI after exercise or rest and increased subjective appetite only after exercise. Increased EI may result from a preference for hot foods altered by a cooling vest.

Effects of two external cooling strategies on physiological and perceptual responses of athletes with tetraplegia during and after exercise in the heat

Athletes with tetraplegia may experience marked hyperthermia while exercising under environmental heat stress due to their limited ability to dissipate heat through evaporative means. This study investigated the effectiveness of two external cooling strategies (i.e., spraying water onto the body surface or using a cooling vest) on physiological and perceptual variables in tetraplegic athletes during and after an aerobic exercise session in a hot environment. Nine male wheelchair rugby players performed an incremental test to determine their maximum aerobic power output. After that, they were subjected to three experimental trials in a counter-balanced order: control (CON, no body cooling), cooling vest (CV), and water spraying (WS). During these trials, they performed 30 min of a submaximal exercise (at 65% of their maximum aerobic power) inside an environmental chamber set to maintain the dry-bulb temperature at 32 °C. The following variables were recorded at regular intervals during the exercise and for an additional 30 min following the exertion (i.e., post-exercise recovery) with the participants also exposed to 32 °C: body core temperature (TCORE), skin temperature (TSKIN), heart rate (HR), rating of perceived exertion (RPE), thermal comfort (TC), and thermal sensation (TS). While exercising in CON conditions, the tetraplegic athletes had the expected increases in TCORE, TSKIN, HR, RPE, and TC and TS scores. HR, TC, and TS decreased gradually toward pre-exercise values after the exercise, whereas TCORE and TSKIN remained stable at higher values. Using a cooling vest decreased the temperature measured only on the chest and reduced the scores of RPE, TC, and TS during and after exercise but did not influence the other physiological responses of the tetraplegic athletes. In contrast, spraying water onto the athletes' body surface attenuated the exercise-induced increase in TSKIN, led to lower HR values during recovery, and was also associated with better perception during and after exercise. We conclude that water spraying is more effective than the cooling vest in attenuating physiological strain induced by exercise-heat stress. However, although both external cooling strategies do not influence exercise hyperthermia, they improve the athletes’ thermal perception and reduce perceived exertion.

Thermal Performance of Prototype Cooling Vest with Moisture Evaporation Function and Its Effects on Physiological Responses

Thermal Performance of Prototype Cooling Vest with Moisture Evaporation Function and Its Effects on Physiological Responses

Novel Design of a Personal Liquid Cooling Vest for Improving the Thermal Comfort of Pilots Working in Hot Environments

Wearing a liquid cooling garment (LCG) that offers near-zone cooling improves the thermal comfort of pilots working in hot environments. Four LCG samples with different arrangements of tubes for distributing liquid were developed. Based on the analysis of the overall and local cooling efficiency of the four LCG samples using manikin tests, another novel LCG with a horizontal-vertical combined tube was proposed to achieve optimal cooling performance. Human trials were conducted to check the novel LCG for improving the thermal comfort of pilots in a hot indoor environment (40°C, 40% RH). The mean skin temperature of the subjects wearing the novel LCG was reduced by 1.9°C in the 120-minute-duration flying simulation work compared to the no-cooling scenario, and the greatest decrease in skin temperature (i.e., 5.7°C) was exhibited at the back waist. The thermal sensation at the upper body was improved to nearly neutral, and the heat stress level was reduced from moderate to slightly. The findings provide a guideline for designing personal LCG, thus benefiting the comfort and safety of pilots in hot cockpits.

Experimental study on improvement effect of a cooling vest on thermal comfort of manufactory workers

This study aimed to examine the effect of a personal cooling vest on improving the thermal comfort of workers in a warm and hot indoor environment. The experiments were conducted under three temperatures: 27 °C, 29 °C, and 31 °C. Twenty subjects (10 males and 10 females) were recruited. They were required to perform three activities (i.e., sitting, light packing and heavy packing activity). Subjects experienced two scenarios: the one wearing the cooling vest (CV), and the other without the cooling vest (NCV). The skin temperature and peripheral oxygen saturation (SpO2) were measured. Subjects' thermal comfort and sensation votes were collected, and their responses to two cognitive tasks and working efficiency were also recorded. The use of CV reduced subjects' local and mean skin temperature effectively. Compared with the light packing activity, the decrease of local and mean skin temperature was smaller during heavy packing. With the use of CV, the SpO2 in the three activities and work efficiency in the two packing activities tended to increase. The result of subjective responses showed that their thermal sensation and comfort votes were also significantly improved by the use of CV. With the increase of activity level, the improving effect tended to decline, in which the decrement of thermal sensation vote became smaller in the heavy packing activity. The results of cognitive ability tests showed that the tasks’ completion time was not affected by the use of CV, while the error rate of the Stroop test decreased.

Is the Cooling Vest an Ergogenic Tool for Physically Active Individuals? Assessment of Perceptual Response, Thermo-Physiological Behavior, and Sports Performance: A Systematic Review and Meta-Analysis.

Exercise capacity is limited by environmental heat stress because thermoregulatory systems are altered and cannot prevent the elevation of body temperature due to a complex interplay of physiological, physical, and perceptual alterations. Cooling is an effective strategy to attenuate the temperature rise. Based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and the PEDro scale for assessing methodological quality, we systematically reviewed studies indexed in Medline, Web of Science, EMBASE, Science Direct, Sportdiscus, and Scopus, to evaluate the effects of the cooling vest (CVs) on perceptual response, physiological behavior, and sports performance in adult physical activity practitioners under heat stress conditions. Among the 711 studies identified in the search, 10 studies for the systematic review and eight for the meta-analysis met the inclusion and exclusion criteria. Overall, the use of CVs showed improvements in certain sports performance indicators, being significant (p < 0.05) in test time and substantial in peak power that could be influenced directly by the significant reduction (p < 0.05) in skin temperature and indirectly by the significant improvement (p < 0.05) in thermal and exertional perceptual responses, without the involvement of core temperature. In conclusion, the use of CVs is a cooling technique that influences perceptual response, thermo-physiological behavior, and sports performance. However, further studies are needed to elucidate the relevance of its application to CVs.

Analytical Model for Thermoregulation of the Human Body in Contact with a Phase Change Material (PCM) Cooling Vest

Cooling vests containing phase change materials (PCMs) are used to reduce heat stress in hot environments and maintain the body core temperature within a safe range. The performance of such cooling vests depends in a complicated way on the PCM material and mass, the insulation value of the clothing layers and heat loss to the environment. Conventionally, these performance parameters are evaluated experimentally or using a numerical model, both of which do need a certain amount of evaluation time. The objective of this paper is to develop a transient heat transfer model which includes metabolic heat production in the human body, as well as clothing and PCM layers and radiation to the environment but which is presented as a series of closed-form equations that can be evaluated without the need of a numerical solver. We present solutions for the body and PCM temperature as well as for the heat flux, cooling power and cooling duration. The model equations are validated by comparing them with experiments of ice PCM packs on a hotplate, as well as with published experimental and numerical data for the core temperature, heat flux and percentage of environmental heat loss using a Glauber salt type of PCM. Both the hotplate experiments and the model predictions show that the cooling power during PCM melting drops from about 70 to 32 W for increasing insulation layer thicknesses. In addition, the model is seen to compare well with experimental and simulation data in the literature. In a parametric study, we show how the equations can be used to evaluate the effects of PCM melting temperature and PCM thickness on cooling performance. The paper, therefore, can be considered as a practical means to help select the best cooling vest configuration for workers in a hot and humid environment.

Verification of a Comfort-Enhanced Liquid Cooling Vest

Firefighter uniforms provide thermal protection and block radiant as well as high-temperature heat. However, they limit cooling and the dissipation of internal heat from the body. This study attempted to improve firefighter uniforms by developing and evaluating a comfortable and thermally balanced design. This study recruited six male college students for a within-subject comparison of vests with and without active liquid cooling. The participants used a questionnaire to report their comfort level in each body part while performing various motions. A biomechanical analysis was performed to objectively evaluate the comfort level of the cooling vest before and after the test. Subsequently, the participants’ blood pressure and ear as well as skin temperature were measured as they ran on a treadmill. The participants also responded to a questionnaire regarding their thermal perception. The results revealed that the cooling vest was comfortable and flexible. The data from the psychological questionnaire indicated that the participants were satisfied with the warmth, coolness, and other various aspects of the cooling vest. Moreover, the cooling vest positively affected the wearer’s microclimate and provided a comfortable thermal balance. The current findings demonstrate the feasibility of using human-factors-engineering-based objective verification methods for designing products.

Experimental and numerical performance evaluation of a cooling vest subtending phase change material under the extremely hot and humid environment

Cooling vests containing phase change materials (PCMs) are one way to confront the effects of personal heat. These vests reduce the body's temperature by absorbing the excess body heat with PCM. This study aimed to investigate the performance of a cooling vest and its efficacy on physiological parameters in extremely hot and humid conditions, which are the operating conditions of the oil and gas industry in the Persian Gulf region. The heart rate, systolic and diastolic blood pressure, thermal sensation, and sweating rate of nineteen volunteers were measured in a climatic chamber with a temperature of 40 °C and relative humidity of 45%. The results indicated that the vest did not have a significant effect on heart rate and systolic and diastolic blood pressure over time. However, it affects the thermal sensation and sweating rate. In order to find the performance duration of the vest used, one package of PCM with a melting temperature of 28 °C was simulated. In general, it can be concluded that this type of cooling vest under the tested climatic conditions does not have a 3-hour performance claimed by the manufacturer. Nevertheless, this cooling vest has a significant effect on the subject's thermal sensation for 20 min. These findings may be applied in the future design of cooling vests under mentioned environmental conditions.

Cooling vests alleviate perceptual heat strain perceived by COVID-19 nurses

ABSTRACT Cooling vests alleviate heat strain. We quantified the perceptual and physiological heat strain and assessed the effects of wearing a 21°C phase change material cooling vest on these measures during work shifts of COVID-19 nurses wearing personal protective equipment (PPE). Seventeen nurses were monitored on two working days, consisting of a control (PPE only) and a cooling vest day (PPE + cooling vest). Sub-PPE air temperature, gastrointestinal temperature (Tgi), and heart rate (HR) were measured continuously. Thermal comfort (2 [1–4] versus 1 [1–2], pcondtition < 0.001) and thermal sensation (5 [4–7] versus 4 [2–7], pcondition < 0.001) improved in the cooling vest versus control condition. Only 18% of nurses reported thermal discomfort and 36% a (slightly) warm thermal sensation in the cooling vest condition versus 81% and 94% in the control condition (OR (95%CI) 0.05 (0.01–0.29) and 0.04 (<0.01–0.35), respectively). Accordingly, perceptual strain index was lower in the cooling vest versus control condition (5.7 ± 1.5 versus 4.3 ± 1.7, pcondition < 0.001, respectively). No differences were observed for the physiological heat strain index Tgi and rating of perceived exertion across conditions. Average HR was slightly lower in the cooling vest versus the control condition (85 ± 12 versus 87 ± 11, pcondition = 0.025). Although the physiological heat strain among nurses using PPE was limited, substantial perceptual heat strain was experienced. A 21°C phase change material cooling vest can successfully alleviate the perceptual heat strain encountered by nurses wearing PPE.

University–Industry Collaboration in Frugal Innovation Through Prototyping: The Case of a Firefighter Cooling Vest

The research presented here analyses the design and development of a firefighters cooling vest for rural Australian volunteer bush firefighting services. Bush firefighting is hazardous work due to extreme heat stress experienced by firefighters. Cooling vests therefore form a critical part in reducing the core body temperature of firefighters on duty. Given that volunteer fire fighting services have minimal funding for either the purchase of existing cooling vests or for R&D of new affordable cooling vests; resources for the project are particularly constrained. Reflective analysis of the case study against some of the key features of frugal innovation identifies that management of priority and constraint as well as prototyping during design development may be useful in achieving a good university-industry collaboration (UIC) for manufacturing small-medium enterprises (SMEs). An existing integrated parameter model is utilized to reflect the way priority and constraint is managed in conjunction with prototyping and has been adapted using frugal innovation objectives to conceptualize the case analysis. Analysis of the case, by referencing the literature on frugal innovation and ways of managing UIC projects for new product development, uncovers a complementary relationship between the two practices. The adapted version of the integrated parameter model presented can provide a reference guide for other UIC product design projects for SMEs operating within the constraints of frugal innovation, incorporating prototyping as the central method of research.

The influence of an active microclimate liquid-cooled vest on heat strain alleviation

This research was performed to test the effectiveness of the microclimate body cooling system which belongs to the group of active systems with liquid-cooled technology. The liquid cooling vest efficiency was observed concerning the physiological fitness of the standard protective set used in specific environmental conditions which imply increased thermal strain of the test subjects. Experimental results from the research are based on the examinations carried out in a thermo-physiological laboratory. Ten healthy male volunteers ? test subjects aged (23.4 ? 2.4 years, weight 74 ? 7 kg, and height 184 ? 9 cm) were exposed to thermal strain testing (40 ?C temperature, 40 ?3 % relative humidity, without wind) and simultaneously to physical effort caused by walking on the treadmill at a speed of 5 km/h, during 45 minutes. Tests were performed in two variants: without any cooling system and with the KewlFlow Circulatory Cooling Vest with Cooler Kit. Throughout heat exposure, the subject?s body core temperature (tympanic temperature ? Tty), mean skin temperature, Tsk, and heart rate were measured. Furthermore, sweat rate was calculated in order to determine all changes in the water and electrolyte status. Experimental results confirm that the results of this study have recognized the benefits of a liquid-cooled vest in lowering the thermal strain.

Study on an Evaporative Cooling Vest for Farm Workers

Study on an Evaporative Cooling Vest for Farm Workers

Chemically Activated Cooling Vest's Effect on Cooling Rate Following Exercise-Induced Hyperthermia: A Randomized Counter-Balanced Crossover Study.

Background and objectives: Exertional heat stroke (EHS) is a potentially lethal, hyperthermic condition that warrants immediate cooling to optimize the patient outcome. The study aimed to examine if a portable cooling vest meets the established cooling criteria (0.15 °C·min−1 or greater) for EHS treatment. It was hypothesized that a cooling vest will not meet the established cooling criteria for EHS treatment. Materials and Methods: Fourteen recreationally active participants (mean ± SD; male, n = 8; age, 25 ± 4 years; body mass, 86.7 ± 10.5 kg; body fat, 16.5 ± 5.2%; body surface area, 2.06 ± 0.15 m2. female, n = 6; 22 ± 2 years; 61.3 ± 6.7 kg; 22.8 ± 4.4%; 1.66 ± 0.11 m2) exercised on a motorized treadmill in a hot climatic chamber (ambient temperature 39.8 ± 1.9 °C, relative humidity 37.4 ± 6.9%) until they reached rectal temperature (TRE) >39 °C (mean TRE, 39.59 0.38 °C). Following exercise, participants were cooled using either a cooling vest (VEST) or passive rest (PASS) in the climatic chamber until TRE reached 38.25 °C. Trials were assigned using randomized, counter-balanced crossover design. Results: There was a main effect of cooling modality type on cooling rates (F[1, 24] = 10.46, p < 0.01, η2p = 0.30), with a greater cooling rate observed in VEST (0.06 ± 0.02 °C·min−1) than PASS (0.04 ± 0.01 °C·min−1) (MD = 0.02, 95% CI = [0.01, 0.03]). There were also main effects of sex (F[1, 24] = 5.97, p = 0.02, η2p = 0.20) and cooling modality type (F[1, 24] = 4.38, p = 0.047, η2p = 0.15) on cooling duration, with a faster cooling time in female (26.9 min) than male participants (42.2 min) (MD = 15.3 min, 95% CI = [2.4, 28.2]) and faster cooling duration in VEST than PASS (MD = 13.1 min, 95% CI = [0.2, 26.0]). An increased body mass was associated with a decreased cooling rate in PASS (r = −0.580, p = 0.03); however, this association was not significant in vest (r = −0.252, p = 0.39). Conclusions: Although VEST exhibited a greater cooling capacity than PASS, VEST was far below an acceptable cooling rate for EHS treatment. VEST should not replace immediate whole-body cold-water immersion when EHS is suspected.

The Effect of an Optimized Cooling Vest for Controlling the Women’s Thermal Strain in the Hot Laboratory Conditions

Background: Continuous activities in hot environments are a serious threat to people’s health in society, especially in women. Objectives: Therefore, the purpose of this study was to evaluate the effect of an optimized cooling vest to control the women's thermal strain in the hot laboratory conditions. Methods: The cooling vest (1500 g) was designed for women. This study carried out on 20 female students in a climatic chamber (37°C, humidity, 39%) on a treadmill (2 km/h and zero-degree gradient) in two modes, with the cooling vest (6 steps in 10 min) and without the cooling vest (4 stages in 10 min). The measured parameters at certain time points included heart rate, oral temperature, thermal sensation (TS), perceived exertion (PE), as well as physiological and perceptual strain indices (PSI and PeSI). Ultimately, the data were analyzed by SPSS software (Ver. 22), and the paired t-test was used to compare the data at different time points. Results: The statistical analysis showed a significant difference between the mean TS, PE, PeSI, and PSI in the two test modes (P 0.05). Conclusions: Considering the positive effects of the designed cooling vest for perceptual and physiological heat strain for women, it can be used as a useful and cost-effective solution in the warm environment to reduce the effects of exposure to heat.

Experimental Study on the Efficacy of a Novel Personal Cooling Vest Incorporated with Phase Change Materials and Fans.

In recent years, personal cooling has aroused much attention because it can achieve both localized high-level thermal comfort and build energy savings. In this study, a novel hybrid personal cooling vest (PCV) incorporated with phase change materials (PCMs) and ventilation fans was developed, and its efficacy was investigated by human trials in a hot-humid climate chamber. Three generally accepted indices (thermal load, Q; thermal sensation, TS; and physiological strain index, PSI) and a new proposed index (cumulative heat storage, CHS) during human trials were comparatively studied between the two human trial groups, i.e., the PCV group (wearing the PCV) and the CON group (without PCV). Results found that TS, PSI, and CHS were significantly reduced by the PCV, which suggests that the PCV can significantly improve both the perceptual and physiological strain. In addition, a strong linear relationship (r2 = 0.8407) was found between the proposed index of CHS with PSI, which indicates the applicability and reliability of CHS for assessing physiological heat strain.

비닐하우스 작업자의 서열 스트레스 경감을 위한 보텍스 튜브 적용 냉각조끼 개발 및 평가

비닐하우스 작업자의 서열 스트레스 경감을 위한 보텍스 튜브 적용 냉각조끼 개발 및 평가

Wearing a Cooling Vest During Half-Time Improves Intermittent Exercise in the Heat.

Endurance and intermittent exercise performance are impaired by high ambient temperatures. Various countermeasures are considered to prevent the decline in exercise performance in the heat, convenient, and practical cooling strategies attracts attention. The purpose of this study was to investigate the effect of wearing a new type of cooling vest which cooled torso and neck during half-time (HT) on intermittent exercise performance that imitated intermittent athletic games. All measurements on the experiments were carried out with the bicycle ergometer. Eight male soccer players performed a familiarization session and two experimental trials of a 2 × 30 min intermittent cycling exercise protocol, which consisted of a 5 s maximal power pedaling (body weight ×0.075 kp) every minutes separated by 25 s unloaded pedaling (80 rpm) and rest (30 s) in the heat (33.0°C; 50% relative humidity). The two trials included cooling-vest condition (VEST) and control condition (CON), and the difference is with or without wearing cooling vest imposed for 15 min at HT. Mean and peak power output, rectal (Tre) and skin temperature (neck, upper back, chest, right upper arm, and thigh), heart rate (HR), deep thigh temperature, rating of perceived exertion (RPE), and thermal comfort (TC) and thermal sensation (TS) were measured. Mean power output at 2nd half was significantly greater (p < 0.05) in VEST (3rd trial: 589 ± 58 W, 4th trial: 584 ± 58 W) than in CON (3rd trial: 561 ± 53 W, 4th trial: 561 ± 53 W). HR were significantly lower in VEST during HT and higher in VEST at the last maximal pedaling (p < 0.05). At the end of HT, neck skin temperature and mean skin temperature were significantly lower in VEST (32.04 ± 1.47°C, 33.76 ± 1.08°C, respectively) than in CON (36.69 ± 0.78°C, 36.14 ± 0.67°C, respectively) (p < 0.05). During 2nd half, TS, TC, and RPE were significantly lower in VEST than in CON (p < 0.05). There was no significant difference in Tre and deep thigh temperature throughout each conditions. These results indicate that wearing a new type of cooling vest during HT significantly improves intermittent exercise performance in the heat with decreased neck and mean skin temperature and improved subjective responses.

Comparison of the Impact of an Optimized Ice Cooling Vest and a Paraffin Cooling Vest on Physiological and Perceptual Strain.

BackgroundIce cooling vests can cause tissue damage and have no flexibility. Therefore, these two undesirable properties of ice cooling vest were optimized, and the present study was aimed to compare the impact of the optimized ice cooling vest and a commercial paraffin cooling vest on physiological and perceptual strain under controlled conditions.MethodsFor optimizing, hydrogel was used to increase the flexibility and a layer of the ethylene vinyl acetate foam was placed into the inside layer of packs to prevent tissue damage. Then, 15 men with an optimized ice cooling vest, with a commercial paraffin cooling vest, and without a cooling vest performed tests including exercise on a treadmill (speed of 2.8 km/hr and slope of %0) under hot (40°C) and dry (40 %) condition for 60 min. The physiological strain index and skin temperature were measured every 5 and 15 minutes, respectively. The heat strain score index and perceptual strain index were also assessed every 15 minutes.ResultsThe mean values of the physiological and perceptual indices differed significantly between exercise with and without cooling vests (P < 0.05). However, the difference of the mean values of the indices except the value of the skin temperature during the exercises with the commercial paraffin cooling vest and the optimized ice cooling vest was not significant (P > 0.05).ConclusionsThe optimized ice cooling vest was as effective as the commercial paraffin cooling vest to control the thermal strain. However, ice has a greater latent heat and less production cost.

Comparison of heat strain recovery in different anti-heat stress clothing ensembles after work to exhaustion

A hot environment combined with physically demanding tasks can subject workers to a higher risk of heat stress. A series of regulations and guidelines have been proposed to design appropriate anti-heat stress work uniform to reduce body heat strain. The present study aimed to examine heat strain recovery in different anti-heat stress clothing ensembles after work to exhaustion in the heat. 10 healthy males performed intermittent treadmill running/walking to exhaustion, followed by 30min passive recovery sitting in a climatic chamber, which simulated the hot and humid outdoor environment (34°C temperature, 60% relative humidity, 0.3m/s air velocity, and 450W/m2 solar radiation). The participants took part in five wear trials in counter-balanced order, including Sportswear, CIC Uniform, NEW Uniform, ICEBANK Cooling Vest, and NEW Cooling Vest, which have different levels of cooling capacity. Core temperature, skin temperature, heart rate, sweat loss, ratings of perceived exertion, and thermal sensations were measured throughout the entire heat exposure period. Physiological heat strain indices, including the physiological strain index (PhSI) and the perceptual strain index (PeSI), were used as a yardstick to quantify and compare the rate of recovery. Significantly lower physiological strain was observed in the newly developed NEW Uniform and NEW Cooling Vest groups compared with the commonly worn CIC Uniform group during recovery. At the end of the recovery period, participants in NEW Cooling Vest achieved the highest recovery (42.18% in PhSI and 81.08% in PeSI), followed by ICEBANK Cooling Vest, Sportswear, NEW Uniform, and CIC Uniform. The cooling capacity of anti-heat stress clothing ensembles and the recovery time significantly affect the rate of recovery in PhSI and PeSI, which may benefit the industry by formulating the appropriate work–rest schedule by considering the clothing effect.