Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme最新文献

{"title":"The cumulative effects of consecutive days of prolonged, physical work or activity on heat strain and physical performance: a systematic review.","authors":"Daniel C Moore, Sean R Notley, Brad Aisbett, Luana C Main","doi":"10.1139/apnm-2024-0391","DOIUrl":"10.1139/apnm-2024-0391","url":null,"abstract":"<p><p>With climate warming, there is an urgent need to understand the health effects of occupational heat exposure. This systematic review examined the cumulative effects of consecutive days of prolonged physical work or activity on heat strain and physical performance. Electronic databases MEDLINE, SPORTDiscus, PsychInfo, and Academic Search Complete were searched until July 2024 with terms related to work, consecutive days, and heat. Studies were included if they involved ≥4 h of physical work/activity on ≥2 consecutive days, and included a measure of heat strain (e.g., core temperature) or physical performance (e.g., repetitions). After removing duplicates, 6030 studies were screened (title and abstract), 133 progressed to full-text screening, and 33 met the inclusion criteria with risk of bias assessed. However, only five studies used standardized environmental and work conditions across days. Synthesis of the cumulative effects (without meta-analysis) was therefore restricted to these studies. None observed a cumulative impact on heat strain, as indexed by a higher core temperature or heart rate compared to day 1. None reported a reduction in physical task performance across days. These findings indicate that the cumulative effects of occupational heat exposure on heat strain and physical task performance were minimal, although evidence supporting this conclusion is sparse. PROSPERO registration: CRD42023452936.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143071282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sex-related differences in motor unit firing rate and pennation angle.","authors":"Michael J Marsala, Alicia M Kells, Anita D Christie","doi":"10.1139/apnm-2024-0202","DOIUrl":"10.1139/apnm-2024-0202","url":null,"abstract":"<p><p>Motor unit firing rate (MUFR) and pennation angle were measured concurrently in males and females from submaximal to maximal intensities. Thirty participants, (16 female, 14 male) performed isometric dorsiflexion contractions at 20%, 40%, 60%, 80%, and 100% of maximal voluntary contraction (MVC). During each contraction, measures of MUFR were obtained via surface electromyography decomposition, and muscle fiber pennation angle and fascicle length were obtained via ultrasound. There was no significant interaction effect of sex and contraction intensity present for mean MUFR (<i>p</i> = 0.24), pennation angle (<i>p</i> = 0.98), or fascicle length (<i>p</i> = 0.81). Males had greater mean MUFR (<i>p</i> < 0.001), pennation angle (<i>p</i> = 0.02), and fascicle length (<i>p</i> = 0.03) compared to females. In general, mean MUFR (<i>p</i> < 0.001) and pennation angle (<i>p</i> < 0.02) increased with increasing contraction intensity; however, fascicle length (<i>p</i> = 0.30) was similar across contraction intensities. There were no significant relationships between mean MUFR and pennation angle for males (<i>r</i> = 0.18, <i>p</i> = 0.13) or females (<i>r</i> = 0.20, <i>p</i> = 0.09), nor between mean MUFR and fascicle length for males (<i>r</i> = 0.20, <i>p</i> = 0.10) or females (<i>r</i> = 0.21, <i>p</i> = 0.07). Although sex-related differences in MUFR, pennation angle, and fascicle length were present, there were no relationships between MUFR and the muscle properties. These results suggest that sex-related differences in mean MUFR may not be associated with the sex-related differences in the muscle architectural properties currently investigated.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142960224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and evaluation of a food choices assessment score (FCAS) measuring the healthfulness of dietary choices according to 2019 Canada's Food Guide/Canada's Dietary Guidelines, using the Canadian Health Measures Survey food frequency questionnaire.","authors":"Samer Hamamji, Mavra Ahmed, Daniel Zaltz, Mary R L'Abbé","doi":"10.1139/apnm-2024-0305","DOIUrl":"10.1139/apnm-2024-0305","url":null,"abstract":"<p><p>The objective of this study was to develop and evaluate a food choices assessment score (FCAS) measuring alignment with 2019 Canada's Food Guide (CFG) and Canada's Dietary Guidelines (CDG) using a non-quantitative food frequency questionnaire (FFQ) data. Cross-sectional data from the Canadian Health Measures Survey (2016-2019), including 6459 participants (≥19 years) and a non-quantitative FFQ (∼100 food items) were used. Content and construct validity and assessing reliability were used to evaluate the FCAS, including a comparison of mean FCAS among Canadian subgroups, calculating the FCAS for high quality diet menus, investigating the consistency of the FCAS with the Dietary Approaches to Stop Hypertension (DASH), as a healthy diet linked with lower cardiometabolic risks, and estimating Cronbach's alpha for reliability. The FCAS consisted of nine components for a total of 80 points. The FCAS captured the key recommendations of the 2019 CFG/CDG. Mean (SE) FCAS of the adult Canadian population was 29.3 (0.4) (/80) and was higher in females 32.2 (0.4) and non-smokers 30.3 (0.3) compared to males 26.7 (0.4) and smokers 23.6 (0.9), respectively (<i>p</i> < 0.0001). FCAS yielded high scores for healthy menu samples of CDG (80/80) and DASH (70/80) diets. FCAS was correlated with DASH diet score (<i>r</i> = 0.83). Cronbach's alpha was found to be moderate (0.5), as expected, which confirmed the multidimensionality of the FCAS components in reflecting different characteristics of diet quality. These analyses suggest adequate validity with multidimensional consistency of the 2019 CFG/CDG FCAS as a new tool for use with non-quantitative FFQ data.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143018051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Canadian Society for Exercise Physiology Annual Conference.","authors":"","doi":"10.1139/apnm-2024-0513","DOIUrl":"https://doi.org/10.1139/apnm-2024-0513","url":null,"abstract":"","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":"50 ","pages":"S1-S83"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143384301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How are exercise professionals described within academic literature? A narrative review.","authors":"Madeline E Shivgulam, Abigail R Tiemstra, Brooke J Hebert, Jonathon R Fowles, Myles W O'Brien, Taniya S Nagpal","doi":"10.1139/apnm-2024-0416","DOIUrl":"https://doi.org/10.1139/apnm-2024-0416","url":null,"abstract":"<p><p>There is growing interest to include exercise into healthcare for the prevention, treatment, and management of chronic disease. However, what defines an \"exercise professional\" to fulfil these roles and responsibilities is not clear across Canada. While exercise science often integrates exercise professionals within academic studies to assist exercise-based research, exploring how exercise professionals are involved in these contexts may contribute to developing a clearer understanding of how these professionals may be characterized. The purpose of this narrative review was to summarize how exercise professionals are described in research and identify the components that inform their unique roles. A keyword search of \"exercise professional\" was performed in multiple databases, including Medline, SportDiscus, and Web of Science to identify peer-reviewed studies that included \"exercise professionals\". Fifteen studies were included, and two independent reviewers performed a reflexive thematic analysis to derive three themes that represent how exercise professionals were described: (1) job title; (2) roles/duties (e.g., fitness testing, motivational interviewing), and (3) education/qualifications/credentials. Common occupations involved in research included exercise physiologists, kinesiologists, and personal trainers. Exercise professionals were responsible for interacting with clinical and non-clinical populations in a variety of contexts. Similarly, qualifications varied, with some studies specifying further training to work with special populations (e.g., patients who have cancer). By identifying these discrepancies, this study highlights the need to develop consistent definitions and roles to promote recognition and integration of exercise professionals in both clinical and community settings.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":"50 ","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143392716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Brain-derived neurotrophic factor response to daylong exposure to extreme heat in young and older adults: a secondary analysis.","authors":"Nathalie V Kirby, Robert D Meade, James J McCormick, Kelli E King, Glen P Kenny","doi":"10.1139/apnm-2024-0289","DOIUrl":"10.1139/apnm-2024-0289","url":null,"abstract":"<p><p>Brain-derived neurotrophic factor (BDNF) is a growth factor associated with a range of neurological, cardioprotective, and metabolic health benefits. While passive heat stress has been observed to increase circulating BDNF, the BDNF response to a given stressor may be attenuated with increasing age. To investigate the influence of age on the BDNF response to heat stress, we compared BDNF responses to daylong (9 h) exposure to hot ambient conditions (40 °C, 9% relative humidity) between 19 young (range: 19-31 years; 9 women) and 37 older adults (61-78 years; 12 women). We also explored whether cumulative thermal strain (area under the curve of rectal and mean body temperatures) impacted comparisons. Serum BDNF concentrations were assessed at pre- and end-exposure using enzyme-linked immunosorbent assays. Circulating BDNF concentrations increased from baseline in both groups (<i>P <</i> 0.001), but end-exposure concentrations were 2594 [1555-3633] pg/mL lower in older than young adults (<i>P <</i> 0.001). This age-related difference persisted, albeit to a lesser magnitude, after accounting for the lower pre-exposure BDNF levels in older adults (baseline-adjusted between-group difference: 1648 [667-2630] pg/mL; <i>P <</i> 0.001). Additionally, the BDNF response was not related to indices of thermal strain (<i>P</i> ≥ 0.562), and baseline-adjusted between-group differences were not appreciably altered by adjusting for area under the curve of rectal (1769 [714-2825] pg/mL; <i>P =</i> 0.002) or mean body temperatures (1745 [727-2763] pg/mL; <i>P =</i> 0.001). Our study is the first to demonstrate an age-related reduction in the BDNF response to prolonged passive heat exposure, which informs our wider understanding of how environmental stressors influence BDNF responses in older adults.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143461042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mobilizing knowledge generated from Canadian Institutes of Health Research-Institute of Nutrition, Metabolism and Diabetes (CIHR-INMD) food and health strategic research funding.","authors":"M J Makarchuk, N D Rosenblum","doi":"10.1139/apnm-2025-0010","DOIUrl":"https://doi.org/10.1139/apnm-2025-0010","url":null,"abstract":"","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":"50 ","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143257579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The type of sport, but not sex, impacts body composition and metabolic response to a complete weight loss-weight regain episode in weight cycling athletes: results from the WAVE study.","authors":"Sarah Bagot, Ines Ramos, Jennifer Miles-Chan, Abdul Dulloo, Anthony C Hackney, Yves Boirie, Martine Duclos, David Thivel, Laurie Isacco","doi":"10.1139/apnm-2024-0376","DOIUrl":"10.1139/apnm-2024-0376","url":null,"abstract":"<p><p>Athletes may engage in weight cycling-successive episodes of weight loss and weight (re)gain-for performance reasons, but risk metabolic adaptations and regaining more fat that was lost (fat overshoot). This study aimed to assess the influence of a complete weight cycling episode on body composition, thermoregulation, and metabolism in athletes, considering sex and the type of sport practiced. Forty-eight athletes (28 males, 20 females) engaged in combat (<i>n</i> = 23), strength <i>(n</i> = 12), or endurance (<i>n</i> = 13) sports were examined under three experimental conditions (weight maintenance, weight loss, weight (re)gain) during a weight cycling episode using their habitual strategies. Body composition (dual-energy X-ray absorptiometry), core body temperature (telemetric temperature sensor), energy expenditure and substrate oxidation at rest and during moderate exercise (indirect calorimetry), and energy intake (48 h food record) were assessed. Overall, athletes lost 4.4 ± 2.3% body weight, 12.2 ± 10.6% fat mass, and 2.6 ± 2.3% fat-free mass (<i>p</i> < 0.001). All variables returned to baseline values during the regain period, and a higher fat mass regain was observed in endurance than combat athletes (<i>p</i> < 0.01). During weight loss, a transient increase in lipid and decrease in carbohydrate oxidation occurred at rest and during exercise (<i>p</i> < 0.001). Energy expenditure and core body temperature remained unchanged across the three experimental conditions, and no specific sex effect was observed. Overall, no apparent body weight nor fat overshoot was observed in athletes after a complete weight cycling episode. Nonetheless, the greater fat mass gain in endurance, compared with combat athletes, highlights a need for further specific long-term studies in this population. <b>Clinical Trial registration:</b> NCT04107545.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The association of <i>SLC16A1</i> (<i>MCT1</i>) gene polymorphism with body composition changes during weight loss interventions: A randomized trial with sex-dependent analysis.","authors":"Rocío Cupeiro, Pedro J Benito, Teresa Amigo, Domingo González-Lamuño","doi":"10.1139/apnm-2024-0246","DOIUrl":"10.1139/apnm-2024-0246","url":null,"abstract":"<p><p>Monocarboxylates, transported by monocarboxylate transporters (MCTs), have been proposed to influence energy homeostasis and exhibit altered metabolism during exercise. This study investigated the association between the Asp490Glu (T1470A) (rs1049434) polymorphism of the <i>SLC16A1</i> (<i>MCT1</i>) gene and changes in body composition in males and females with overweight or obesity. The 173 participants (56.6% females) completed a 6-month randomized controlled trial, being assigned to the Supervised Exercise group (strength, endurance, or strength plus endurance training) or the Physical Activity (PA) Recommendations group. Participants were genotypically categorized as Asp/Asp (TT), Asp/Glu (TA), or Glu/Glu (AA). ANCOVA analysis showed main effects for genotype and interaction genotype × group (<i>p</i> < 0.05) for several variables, especially in females. Asp/Asp (TT) females showed greater reductions in total fat mass (-29.30 ± 8.75% change), percentage of body fat (-17.50 ± 8.06% change), and body weight (-13.90 ± 2.62% change) compared with Glu/Glu (AA) (<i>p</i> ≤ 0.020; <i>d</i> ≥ 0.18) and Asp/Glu (TA) (<i>p</i> ≤ 0.050; <i>d</i> ≥ 0.16) females, but only within the PA Recommendations group. Data indicated higher decreases in lean body mass of the Asp/Asp (TT) compared to Glu/Glu (AA) in females (<i>p</i> = 0.067, η² _p = 0.067) and to Asp/Glu (TA) in males (<i>p</i> = 0.026; η² _p = 0.101). Our investigation suggests an association of the single-nucleotide polymorphism with body composition changes especially in females following exercise recommendations, highlighting the importance of supervised training to offset genetic predisposition for different weight loss. Differences in males only appeared for lean body mass, suggesting sex differences for this genetic association. The study underscores the potential influence of MCT1 functionality on human adaptations to weight loss interventions. ClinicalTrials.gov information: registry name, Nutrition and Physical Activity for Obesity (PRONAF); registration number, NCT01116856.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142960227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tabata training in perspective.","authors":"Izumi Tabata","doi":"10.1139/apnm-2023-0506","DOIUrl":"10.1139/apnm-2023-0506","url":null,"abstract":"<p><p>Originally developed as a specific form of exhaustive intermittent training involving 6-8 × 20 s of supramaximal-intensity cycling exercises with 10 s of recovery for athletes, Tabata training has become universally recognized around the world. The purpose of this review article is to provide a perspective on Tabata training and discuss how this popular style of intermittent training has evolved and been applied over the last ∼30 years. The article will review the original motivation behind Tabata training with relevance to concepts such as maximal accumulated oxygen deficit and maximal oxygen uptake (V̇o₂max) and discuss how Tabata training has been adapted to involve sport-specific training and cross training. Studies of Tabata training on physiological responses and adaptations in muscle, blood vessels, bone, and brain across different populations will be reviewed. Finally, research on how Tabata-style training was applied to counteract inactivity during the COVID19 pandemic will be discussed. Evolving from the study of athletes, Tabata training represents an example of how high-intensity intermittent/interval training can be adapted and applied in various settings to enhance performance and health.</p>","PeriodicalId":93878,"journal":{"name":"Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme","volume":" ","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}