Hein A M Daanen

Hein A M Daanen
Vrije Universiteit Amsterdam | VU · Behavioural and Movement Sciences

PhD

About

201
Publications
102,924
Reads
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5,946
Citations
Citations since 2016
57 Research Items
3432 Citations
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20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
Introduction
Hein A M Daanen currently works at the Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam. Hein is specialized in Thermal Physiology and 3D-Anthropometry.
Additional affiliations
September 2013 - September 2016
Amsterdam University of Applied Sciences/Centre for Applied Research on Education
Position
  • Professor
June 2003 - present
Vrije Universiteit Amsterdam
Position
  • Professor (Full)
Description
  • Professor in Thermal Physiology
January 1996 - July 1996

Publications

Publications (201)
Article
Full-text available
During the early stage of a fire, a process operator often acts as the first responder and may be exposed to high heat radiation levels. The present limit values of long- (>15 min) and short-term exposure (<5 min), 1.0 and 1.5 kW/m2, respectively, have been set using physiological models and manikin measurements. Since human validation is essential...
Article
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Heat acclimation (HA) protocols repeatedly expose individuals to heat stress. As HA is typically performed close to the pinnacle event, it is essential that the protocol does not compromise immune status, health, or wellbeing. The purpose of this study was to examine the effect of HA on resting salivary immunoglobulin-A (s-IgA) and salivary cortiso...
Article
Purpose Three feasible cooling methods for treatment of hyperthermic individuals in the military, that differed considerably in water volume needed (none to ~80 L), were evaluated. Methods Ten male soldiers were cooled following exercise-induced hyperthermia (rectal temperature (Tre) ∼39.5 °C) using ventilation by fanning (1.7 m s⁻¹), ventilation...
Article
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Purpose To determine the efficacy of decreasing spinal curvature – when sleeping laterally – in reducing low-back pain (LBP) and improving sleep quality in people with chronic LBP. Secondly, to investigate whether sleeping positions, nocturnal movements, and skin temperature are related to pain in people with chronic LBP. Methods Sixteen subjects...
Article
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Purpose Over the last few decades, a global increase in both cold and heat extremes has been observed with significant impacts on human mortality. Although it is well-identified that older individuals (> 65 years) are most prone to temperature-related mortality, there is no consensus on the effect of sex. The current study investigated if sex diffe...
Article
Thermal models and indices integrated into a mobile application could provide relevant information regarding thermal stress and strain to the general public. The aim of the current paper is to validate such a mobile application, ClimApp, to the users need in the heat. ClimApp combines weather data with personal user data, thermal models and indices...
Article
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This paper describes the functional development of the ClimApp tool (available for free on iOS and Android devices), which combines current and 24 h weather forecasting with individual information to offer personalised guidance related to thermal exposure. Heat and cold stress assessments are based on ISO standards and thermal models where environm...
Article
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Critical environmental limits are environmental thresholds above which heat gain exceeds heat loss and body core temperature (T c ) cannot be maintained at equilibrium. Those limits can be represented as critical wet-bulb globe temperature (WBGT crit ), a validated index that represents the overall thermal environment. Little is known about WBGT cr...
Article
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The environmental conditions during the Tokyo Olympic and Paralympic Games are expected to be challenging, which increases the risk for participating athletes to develop heat-related illnesses and experience performance loss. To allow safe and optimal exercise performance of Dutch elite athletes, the Thermo Tokyo study aimed to determine thermoregu...
Article
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Purpose: The magnitude of heat acclimation (HA) adaptations varies largely among individuals, but it remains unclear what factors influence this variability. This study compared individual characteristics related to fitness status and body dimensions of low-, medium-, and high responders to HA. Methods: Twenty-four participants (9 female, 15 mal...
Article
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The effects of climate change will exert both indirect (e.g., ecosystem disruption, air pollution, and changing disease-vector patterns) and direct (e.g., droughts, floods, wildfires, temperature increases) impacts on human health, especially in vulnerable populations like children. How these factors affect physical activity (PA) in children is les...
Article
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Heat waves and Covid-19 overlap, as this pandemic continues into summer 2021. Using a narrative review, we identified overlapping risk groups and propose coping strategies. The high-risk groups for heat-related health problems as well as for high-risk COVID-19 groups overlap considerably (elderly with pre-existing health conditions). Health care fa...
Article
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A rise in body core temperature and loss of body water via sweating are natural consequences of prolonged exercise in the heat. This review provides a comprehensive and integrative overview of how the human body responds to exercise under heat stress and the countermeasures that can be adopted to enhance aerobic performance under such environmental...
Article
Objective By attaching absorbent patches to the skin to collect sweat, an increase in local skin temperature (Tsk) underneath the patches seems unavoidable. Yet this effect has not been quantified. The present study investigates the effect of absorbent patch application on local Tsk underneath. Approach Ten healthy participants cycled for 60 min at...
Article
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Purpose To reduce the need for invasive and expensive measures of human biomarkers, sweat is becoming increasingly popular in use as an alternative to blood. Therefore, the (in)dependency of blood and sweat composition has to be explored. Methods In an environmental chamber (33 °C, 65% relative humidity; RH), 12 participants completed three subseq...
Article
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Introduction: The aim of this study was to compare the effectiveness of exercise versus hot water immersion heat reacclimation (HRA) protocols. Methods: Twenty-four participants completed a heat stress test (HST; 33°C, 65% RH), which involved cycling at a power output equivalent to 1.5 W·kg-1 for 35 min whereby thermophysiological variables were...
Article
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Due to time and logistical constraints sweat samples cannot always be analyzed immediately. The purpose of this study was to investigate the effect of storage temperature and duration on sweat electrolyte and metabolite concentrations. Twelve participants cycled for 60 min at 40 W.m⁻² in 33°C and 65% RH. Using the absorbent patch technique, six swe...
Article
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Purpose: Ventilated vests are developed to reduce thermal stress by enhancing convective and evaporative cooling from skin tissue underneath the vest. The purpose of this study is to investigate whether thermal stress is equal when a ventilated vest is worn compared to a no-vest situation with similar dry thermal resistance. Methods: Nine health...
Article
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The purpose of this study was to investigate local sweat rate (LSR) and sweat composition before and after active or passive heat re-acclimation (HRA). Fifteen participants completed four standardized heat stress tests (HST): before and after ten days of controlled hyperthermia (CH) heat acclimation (HA), and before and after five days of HRA. Each...
Article
Full-text available
This study examines the impacts of climate change on future mortality in the Netherlands and the related economic costs. Our methods account for changes in both cold- and heat-related mortality for different age classes, the time dynamics associated with temperature-related mortality, demographic change and the urban heat island effect. Results sho...
Article
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The COVID-19 pandemic started in the cold months of the year 2020 in the Northern hemisphere. Concerns were raised that the hot season may lead to additional problems as some typical interventions to prevent heat-related illness could potentially conflict with precautions to reduce coronavirus transmission. Therefore, an international research team...
Article
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The purpose of this study was to determine local sweat rate (LSR) and sweat composition during heat acclimation (HA). For 10 consecutive days of HA, eight participants cycled in 33 °C and 65% relative humidity at an intensity such that a rectal temperature of 38.5 °C was reached within ∼40 min, followed by a 60-min clamp of this rectal temperature...
Technical Report
Full-text available
The COVID-19 pandemic amplifies health risks for many people in hot weather. To reduce heat-related illness and loss of life authorities and communities should prepare for hot weather and heatwaves — in addition to managing COVID-19 — before extreme heat strikes.
Article
Young children are vulnerable to extreme temperatures due to their physiological and anatomical characteristics and behavioural dependability. The latter is a relatively unexplored area. Therefore, the current study investigated the skin temperature as a proxy of the thermal state of children and care providers in day-care centers, the ability of t...
Article
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People's subjective response to any thermal environment is commonly investigated by using rating scales describing the degree of thermal sensation, comfort, and acceptability. Subsequent analyses of results collected in this way rely on the assumption that specific distances between verbal anchors placed on the scale exist and that relationships be...
Article
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It is essentially unknown how humans adapt or will adapt to heat stress caused by climate change over a long-term interval. A possible indicator of adaptation may be the minimum mortality temperature (MMT), which is defined as the mean daily temperature at which the lowest mortality occurs. Another possible indicator may be the heat sensitivity, i....
Article
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An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Article
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Thermal discomfort is one of the main triggers for occupants’ interactions with components of the built environment such as adjustments of thermostats and/or opening windows and strongly related to the energy use in buildings. Understanding causes for thermal (dis-)comfort is crucial for design and operation of any type of building. The assessment...
Article
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Indeed the abstract now contains more words. Please correct to: The aim of the study was to investigate whether jerk cost (JC) can discriminate between swimming levels. Nine elite and nine non-elite swimmers swam a 50-m front-crawl sprint wearing a 3D accelerometer on their back between the inferior angles of the scapulae. Lap times and JC were cal...
Article
New findings: What is the central question of this study? Hyperoxia enhances endurance performance by increasing O2 availability to locomotor muscles. We investigated whether hyperoxia can also improve prolonged self-paced exercise under conditions of elevated thermal and cardiovascular strain. What is the main finding and its importance? Hyperoxi...
Article
Purpose The purpose of this paper was to investigate whether small holes in an impermeable patch at the wrist improve perceived comfort during exercise. Design/methodology/approach Nine male participants participated in this study. During the experiment, participants cycled 60 W in a hot room (35°C, 30 percent relative humidity) while an imperme...
Article
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The Tokyo Olympics and Paralympic games in 2020 will be held in hot and humid conditions. Heat acclimation (in a climatic chamber) or heat acclimatization (natural environment) is essential to prepare the (endurance) athletes and reduce the performance loss associated with work in the heat. Based on the 1990–2018 hourly meteorological data of Tokyo...
Article
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Purpose The risk for local cold injuries has been linked to poor cold-induced vasodilation (CIVD) during cold exposure and to poor rewarming after cold exposure. The purpose of this study is to establish the relation between CIVD and rewarming speed. Methods Twelve participants immersed one hand in ice water for 30 min to evoke CIVD and the other...
Article
Product lifetimes and obsolescence have been central points of discussion in the fashion field. In this context, design researchers and practitioners have proposed a variety of strategies to enable slower cycles of product replacement, leading to smaller volumes of clothing production and consumption. A previous review of these strategies, however,...
Chapter
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Physical exercise under heat stress can impair performance through multiple physiological mechanisms including cardiovascular, central nervous system, and skeletal muscle metabolism factors. However, repeated heat exposure that increases whole-body temperature, stimulates profuse sweating, and stresses the cardiovascular system, leads to increases...
Article
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Exercising in a hot and humid environment increases core body temperature, which may limit exercise performance. The risk of exercise-induced hyperthermia and associated performance decrement in Olympic sailing athletes is largely unknown. Therefore, this study aimed to compare thermoregulatory responses and performance indicators of elite sailors...
Conference Paper
Full-text available
To avoid radiation exposure to the body, the rotation centre of the shoulder complex is often assessed using the Optotrak motion capture system instead of X-ray imaging. Recently, 3D body scanning techniques evolved from static to temporal scanning. This study investigated if a time series of 3D body scans may be an alternative for motion capture s...
Article
The experienced discomfort of rectal probes and esophageal probes for the estimation of body core temperatures has triggered the development of GI-capsules that are easy acceptable for athletes and workers due to their non-invasive characteristics. We compare two new GI-capsule devices with rectal temperature during cycle ergometer exercise and res...
Article
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Background: Although the acquisition of heat acclimation (HA) is well-documented, less is known about HA decay (HAD) and heat re-acclimation (HRA). The available literature suggests 1 day of HA is lost following 2 days of HAD. Understanding this relationship has the potential to impact upon the manner in which athletes prepare for major competitio...
Chapter
Full-text available
Clothing selection is generally made on the basis of appearance (looks and fashion), costs, and fit. Traditionally, clothing items are fitted in the retail outlet, but increasingly garments are purchased over the internet, making physical fitting impossible. Therefore, the technology of 3D body scanning becomes increasingly important. In the last d...
Article
Purpose: Reaction time has been proposed as a training monitoring tool, but to date results are equivocal. Therefore, it was investigated whether reaction time can be used as a monitoring tool to establish overreaching. Methods: The study included 30 subjects (11 female/19 male, age: 40.8±10.8 y, VO2max: 51.8±6.3 ml/kg/min) who participated in a...
Article
Purpose: Telemetric temperature capsule systems are wireless, relatively non-invasive and easily applicable in field conditions, and have therefore great advantages for monitoring core body temperature. However, the accuracy and responsiveness of available capsule systems have not been compared previously. Therefore, the aim of this study was to e...
Article
A challenge for electric buses is to minimize heating and cooling power to maximally extend the driving range, but still provide sufficient thermal comfort for the driver and passengers. Therefore, we investigated the thermal sensation (TS) and thermal comfort (TC) of passengers in buses during a cool day (temperature 13.4 ± 0.5 °C, relative humidi...
Article
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Background: Coaches in elite swimming carefully design the training programs of their swimmers and are keen on achieving strict adherence to those programs by their athletes. At present, coaches usually monitor the compliance of their swimmers to the training program with a stopwatch. However, this measurement clearly limits the monitoring possibil...
Article
Full-text available
The occurrence of exercise associated muscle cramps can be detrimental for exercise performance and there is controversy about its relation to exercise in the heat. The purpose of this study is therefore to review the influence of exercising in the heat on the occurrence of cramps. There are three main theories for the development of cramps during...
Article
It is the purpose of this study to investigate thermal sensation (TS) and thermal comfort (TC) in changing environments. Therefore, 10 subjects stayed in a 30 °C, 50% relative humidity for 30 min in summer clothes and then moved to a 20 °C room where they remained seated for 30 min (Hot to Reference - HR). Similarly, 11 subjects moved from a 10 °C,...
Article
Full-text available
Purpose: The aim of this study was to investigate whether monitoring of easily measurable stressors and symptoms can be used to early distinguish between acute fatigue (AF) and functional overreaching (FOR). Methods: The study included 30 subjects (11 female/ 19 male, age: 40.8±10.8 y, VO2max: 51.8±6.3 ml/kg/min) who participated in an 8-day cyc...
Article
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For training to be optimal, daily training load has to be adapted to the momentary status of the individual athlete, which is often difficult to establish. Therefore, the present study was performed to investigate the predictive value of heart rate recovery (HRR) during a standardized warm-up for training load. Training load was quantified by the v...
Article
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In de afgelopen decennia is de prestatiedichtheid in de topsport sterk toegenomen. Steeds grotere investeringen in termen van training, begeleiding en innovatie leveren steeds minder prestatiewinst op. De behoefte aan een gedegen trainingsprogramma waarin de balans tussen trainingsarbeid en herstel beter bewaakt wordt door toepassing van nieuwe ken...
Article
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Reviews on whole body human cold adaptation generally do not distinguish between population studies and dedicated acclimation studies, leading to confusing results. Population studies show that indigenous black Africans have reduced shivering thermogenesis in the cold and poor cold induced vasodilation in fingers and toes compared to Caucasians and...
Article
Bradykinesia is associated with reduced quality of life and medication non-compliance, and it may be a prodrome for schizophrenia. Therefore, screening/monitoring for subtle bradykinesia is of clinical and scientific importance. This study investigated the validity and reliability of such an instrument. Included were 70 patients with psychotic diso...
Chapter
Humans can easily generate more than 1000 W of heat during heavy exercise. This heat has to be transferred to the environment to stay in thermal equilibrium. During exercise in extreme cold, heat loss may exceed heat production, and clothing is necessary to prevent hypothermia. It will be shown how ISO standard 11079 can be used to assess the neces...
Conference Paper
Full-text available
Three-dimensional (3D) body scanning becomes increasingly important in the medical, ergonomical and apparel industry. The SizeStream 3D body scanner is a 3D body scanner in the shape of a fitting room that can generate a 3D copy of the human body in a few seconds. The Poikos modeling system generates a 3D image of a person using a front- and side p...
Article
Bradykinesia, a common symptom in psychiatry, is characterized by reduced movement speed and amplitude. Monitoring for bradykinesia is important, as it has been associated with reductions in quality of life and medication compliance. Subtle forms of bradykinesia have been associated with treatment response in antipsychotic-naïve first episode patie...