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Castillo-Escamilla J, Ruffo I, Carrasco-Poyatos M, Granero-Gallegos A, Cimadevilla JM. Heart rate variability modulates memory function in a virtual task. Physiol Behav 2024; 283:114620. [PMID: 38925434 DOI: 10.1016/j.physbeh.2024.114620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/20/2024] [Accepted: 06/22/2024] [Indexed: 06/28/2024]
Abstract
Heart rate variability (HRV) is considered one of the most relevant indicators of physical well-being and relevant biomarker for preventing cardiovascular risks. More recently, a growing amount of research has tracked an association between HRV and cognitive functions (i.e., attention). Research is still scarce on spatial orientation, a basic capability in our daily lives. It is also an important indicator of memory performance, and its malfunctioning working as an early sign of dementia. In this study, a total of 43 female students (M Age = 18.76; SD = 2.02) were measured in their lnRMSSD using the photoplethysmography technique with the Welltory smartphone app. They were also tested in their spatial memory with The Boxes Room, a virtual navigation test. Measures of physical activity were obtained with the International Physical Activity Questionnaire (IPAQ). Correlation analyses and repeated measures ANOVA were performed, comparing participants with high / low lnRMSSD in their spatial performance. Results showed that, at an equal level of physical activity, participants with a higher lnRMSSD were more effective in the early trials of The Boxes Room, being more precise in estimating the correct position of the stimuli. Moreover, a subsequent simple linear regression showed that a higher lnRMSSD was related to a smaller number of errors at the beginning of the spatial task. Overly, these results outline the relationship between HRV and navigation performance in early stages of processing, where the environment is still unknown and the situation is more demanding.
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Affiliation(s)
- Joaquín Castillo-Escamilla
- Department of Psychology, University of Almeria, Carretera de Sacramento s/n, 04120. Almeria, Andalucia, Spain; Centro de Investigación en Salud (Health Research Center), CEINSA-UAL, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain
| | - Irene Ruffo
- Department of Psychology, Sapienza University of Rome, Via dei Marsi, 78, 00185 Rome, Italy
| | - María Carrasco-Poyatos
- Department of Education, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain; Centro de Investigación en Salud (Health Research Center), CEINSA-UAL, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain
| | - Antonio Granero-Gallegos
- Department of Education, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain; Centro de Investigación en Salud (Health Research Center), CEINSA-UAL, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain
| | - José Manuel Cimadevilla
- Department of Psychology, University of Almeria, Carretera de Sacramento s/n, 04120. Almeria, Andalucia, Spain; Centro de Investigación en Salud (Health Research Center), CEINSA-UAL, University of Almeria, Carretera de Sacramento s/n, 04120, Almeria, Andalucia, Spain.
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Ando S, Fujimoto T, Sudo M, Watanuki S, Hiraoka K, Takeda K, Takagi Y, Kitajima D, Mochizuki K, Matsuura K, Katagiri Y, Nasir FM, Lin Y, Fujibayashi M, Costello JT, McMorris T, Ishikawa Y, Funaki Y, Furumoto S, Watabe H, Tashiro M. The neuromodulatory role of dopamine in improved reaction time by acute cardiovascular exercise. J Physiol 2024; 602:461-484. [PMID: 38165254 DOI: 10.1113/jp285173] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024] Open
Abstract
Acute cardiovascular physical exercise improves cognitive performance, as evidenced by a reduction in reaction time (RT). However, the mechanistic understanding of how this occurs is elusive and has not been rigorously investigated in humans. Here, using positron emission tomography (PET) with [11 C]raclopride, in a multi-experiment study we investigated whether acute exercise releases endogenous dopamine (DA) in the brain. We hypothesized that acute exercise augments the brain DA system, and that RT improvement is correlated with this endogenous DA release. The PET study (Experiment 1: n = 16) demonstrated that acute physical exercise released endogenous DA, and that endogenous DA release was correlated with improvements in RT of the Go/No-Go task. Thereafter, using two electrical muscle stimulation (EMS) studies (Experiments 2 and 3: n = 18 and 22 respectively), we investigated what triggers RT improvement. The EMS studies indicated that EMS with moderate arm cranking improved RT, but RT was not improved following EMS alone or EMS combined with no load arm cranking. The novel mechanistic findings from these experiments are: (1) endogenous DA appears to be an important neuromodulator for RT improvement and (2) RT is only altered when exercise is associated with central signals from higher brain centres. Our findings explain how humans rapidly alter their behaviour using neuromodulatory systems and have significant implications for promotion of cognitive health. KEY POINTS: Acute cardiovascular exercise improves cognitive performance, as evidenced by a reduction in reaction time (RT). However, the mechanistic understanding of how this occurs is elusive and has not been rigorously investigated in humans. Using the neurochemical specificity of [11 C]raclopride positron emission tomography, we demonstrated that acute supine cycling released endogenous dopamine (DA), and that this release was correlated with improved RT. Additional electrical muscle stimulation studies demonstrated that peripherally driven muscle contractions (i.e. exercise) were insufficient to improve RT. The current study suggests that endogenous DA is an important neuromodulator for RT improvement, and that RT is only altered when exercise is associated with central signals from higher brain centres.
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Affiliation(s)
- Soichi Ando
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Toshihiko Fujimoto
- Institute of Excellence in Higher Education, Tohoku University, Miyagi, Japan
| | - Mizuki Sudo
- Meiji Yasuda Life Foundation of Health and Welfare, Tokyo, Japan
| | - Shoichi Watanuki
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Kotaro Hiraoka
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Kazuko Takeda
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Yoko Takagi
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
| | - Daisuke Kitajima
- Faculty of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
| | - Kodai Mochizuki
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
| | - Koki Matsuura
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
| | - Yuki Katagiri
- Graduate School of Informatics and Engineering, The University of Electro-Communications, Tokyo, Japan
| | - Fairuz Mohd Nasir
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
- Faculty of Health Sciences, University Sultan Zainal Abidin, Malaysia
| | - Yuchen Lin
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
- Department of Occupational Therapy, Da-Yeh University, Changhua, Taiwan
| | | | - Joseph T Costello
- Extreme Environments Laboratory, School of Sport, Health and Exercise Science, University of Portsmouth, Portsmouth, UK
| | - Terry McMorris
- Extreme Environments Laboratory, School of Sport, Health and Exercise Science, University of Portsmouth, Portsmouth, UK
- Institue of Sport, Nursing and Allied Health, University of Chichester, Chichester, UK
| | - Yoichi Ishikawa
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Yoshihito Funaki
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Shozo Furumoto
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Hiroshi Watabe
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
| | - Manabu Tashiro
- Cyclotron and Radioisotope Centre, Tohoku University, Miyagi, Japan
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Effects of prolonged working hours on heart rate variability in internal medicine physicians. Sci Rep 2022; 12:18563. [PMID: 36329110 PMCID: PMC9633695 DOI: 10.1038/s41598-022-23538-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022] Open
Abstract
Prior studies have utilized heart rate variability (HRV) as the assessment tools for psychological and physiological stress during 24-h shift. However, data regarding effects of prolonged working hours > 24 h on HRV are limited. We aimed to compare between pre- and post-call HRV among physicians who worked 24 plus 8 h. The study included 60 physicians in the internal medicine training. All subjects underwent Holter ECG monitoring for HRV assessment. We compared between HRV of an 8-h regular workday (8am to 4 pm) before on-call duty (pre-call HRV) and an 8-h workday after 24-h on-call duty (post-call HRV). The mean age was 26 ± 2.5 years. Mean total sleep time during on-call duty was 238.9 ± 88.3 min. In overall population, the time-domain and frequency-domain HRV parameters were not different between pre- and post-call day. However, the physicians reported their sleep time in the 1st quartile (< 180 min) had significant increase in SDNN, pNN50, high frequency (HF), and decrease in low/high frequency ratio (LF/HF). In contrast, the physicians reported their sleep time in the 4th quartile (> 307.5 min) had significant decrease in pNN50, LF, HF, and increase in heart rate. Multiple linear regression revealed total sleep time as an independent factor associated with pre- and post-call HRV alterations. More sleep during on call (> 5 h) was associated with HRV pattern suggesting both increased sympathetic activity and reduced parasympathetic activity, while less sleep (< 3 h) during on call was associated with post-call parasympathetic rebound HRV pattern.
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Petelczyc M, Bruhn S, Weippert M. Coupling of local muscle deoxygenation and autonomic control depends on exercise intensity-insights from transfer entropy analysis. Physiol Meas 2018; 39:125005. [PMID: 30524086 DOI: 10.1088/1361-6579/aaec9a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE We analyzed the driving component between the periods of adjacent heartbeats (R-R intervals) and vastus lateralis-deoxygenation (%HHb) during incremental cycling. Considering a tight matching of local metabolism with systemic and local perfusion, a coupling between indices of cardiovascular control (R-R variability) and %HHb is suggested. Further, an intensity-dependent coupling between R-R variability and %HHb was hypothesized, because a multitude of feedback and feedforward mechanisms to autonomic cardiovascular control as well as local vasodilating mechanisms are associated with muscle metabolism and thus exercise intensity. APPROACH Ten male triathletes (age: 34 ± 8 years) completed a test, including baseline (BAS, 50 W), a 25 W * min-1 ramp incremental phase until exhaustion and a recovery period (REC, 50 W). R-R intervals, %HHb and respiratory responses were simultaneously recorded. Five corresponding data segments were selected: BAS, before the first ventilatory threshold (preGET), between GET and the respiratory compensation point (preRCP), above RCP (postRCP), and REC. Bivariate transfer entropy (BTE) was applied to determine the signal coupling between R-R and %HHb. MAIN RESULTS During preGET and preRCP, the analysis yielded the dominating direction from %HHb to R-R intervals, while for postRCP the direction was reversed. No significant signal coupling was detectable for the BAS and REC segments. SIGNIFICANCE Assuming that %HHb is related to the metabolic state of the working muscle, BTE results support the role of metaboreceptors in the systemic blood flow regulation at lower exercise intensities, while other mechanisms (e.g. baroreceptor and mechanoreceptor feedback, central command) that modulate cardiovascular control may override this coupling at higher intensities.
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Affiliation(s)
- M Petelczyc
- Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662, Poland. Authors contributed equally to this manuscript
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