P3-079: MAXIMAL CARDIORESPIRATORY FITNESS TESTING AND HEART RATE RECOVERY IN INDIVIDUALS WITH MILD COGNITIVE IMPAIRMENT

Background: Aerobic training has been shown to promote structural and functional neurocognitive plasticity in cognitively intact older adults. However, little is known about the neuroplastic potential of aerobic exercise in individuals at risk of Alzheimer’s disease (AD) and dementia. Objective: We aimed to explore the effect of aerobic exercise intervention and cardiorespiratory fitness improvement on brain and cognitive functions in older adults with amnestic mild cognitive impairment (aMCI). Methods: 27 participants with aMCI were randomized to either aerobic training (n = 13) or balance and toning (BAT) control group (n = 14) for a 16-week intervention. Pre- and post-assessments included functional MRI experiments of brain activation during associative memory encoding and neural synchronization during complex information processing, cognitive evaluation using neuropsychological tests, and cardiorespiratory fitness assessment. Results: The aerobic group demonstrated increased frontal activity during memory encoding and increased neural synchronization in higher-order cognitive regions such as the frontal cortex and temporo-parietal junction (TPJ) following the intervention. In contrast, the BAT control group demonstrated decreased brain activity during memory encoding, primarily in occipital, temporal, and parietal areas. Increases in cardiorespiratory fitness were associated with increases in brain activation in both the left inferior frontal and precentral gyri. Furthermore, changes in cardiorespiratory fitness were also correlated with changes in performance on several neuropsychological tests. Conclusion: Aerobic exercise training may result in functional plasticity of high-order cognitive areas, especially, frontal regions, among older adults at risk of AD and dementia. Furthermore, cardiorespiratory fitness may be an important mediating factor of the observed changes in neurocognitive functions.

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Heart rate recovery after physical exertion tests in elderly hypertensive patients undergoing resistance training

Fisioterapia em Movimento ◽

10.1590/0103-5150.029.001.ao05 ◽

2016 ◽

Vol 29 (1) ◽

pp. 53-60

Author(s):

Murillo Jales Lins de Lira ◽

Ivan Daniel Bezerra Nogueira ◽

Juliana Fernandes de Souza ◽

Flávio Emanoel Souza de Melo ◽

Ingrid Guerra Azevedo ◽

...

Keyword(s):

Heart Rate ◽

Resistance Training ◽

Cardiorespiratory Fitness ◽

Elderly Women ◽

Heart Rate Recovery ◽

Walk Test ◽

Resistance Training Program ◽

Hypertensive Patients ◽

Elderly Hypertensive ◽

Elderly Hypertensive Patients

Abstract Introduction: Heart rate recovery after exercise is a valuable variable, associated with prognosis and it has been used as an indicator of cardiorespiratory fitness, especially in patients with heart disease, as hypertensive patients. Objective: This study aimed to analyze the response of heart rate recovery in elderly hypertensive patients undergoing a resistance training program. Methods: Sample was composed for 10 elderly women with a mean age of 70.7 ± 7.4 years. Exercise test and six-minute walk test were developed and we checked heart rate recovery in the 1st and 2nd minute post tests, before and after resistance training. Results: There was an increase in mean heart rate recovery in the analyzed minutes in both tests, but only in the 1st minute after six minutes walk test we found a significant increase (p = 0.02). Conclusion: The results suggest the efficacy of resistance training to improve cardiorespiratory fitness of elderly hypertensive patients.

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Nocturnal heart rate variability in older adults with mild cognitive impairment

Journal of Sleep Research ◽

10.1111/jsr.39_12912 ◽

2019 ◽

Vol 28 (S1) ◽

Keyword(s):

Older Adults ◽

Heart Rate ◽

Heart Rate Variability ◽

Cognitive Impairment ◽

Mild Cognitive Impairment

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QT Dispersion and Heart Rate Variability Abnormalities in Alzheimer's Disease and in Mild Cognitive Impairment

Journal of the American Geriatrics Society ◽

10.1111/j.1532-5415.2005.00508.x ◽

2005 ◽

Vol 53 (12) ◽

pp. 2135-2139 ◽

Cited By ~ 54

Author(s):

Roberto Zulli ◽

Franco Nicosia ◽

Barbara Borroni ◽

Chiara Agosti ◽

Paola Prometti ◽

...

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Heart Rate ◽

Heart Rate Variability ◽

Cognitive Impairment ◽

Mild Cognitive Impairment ◽

Qt Dispersion

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HEART RATE MONITORING SYSTEMS IN GROUPS FOR RELIABILITY AND VALIDITY ASSESSMENT OF CARDIORESPIRATORY FITNESS ANALYSIS

Biomedical Engineering Applications Basis and Communications ◽

10.4015/s1016237215500556 ◽

2015 ◽

Vol 27 (06) ◽

pp. 1550055

Author(s):

Ren-Guey Lee ◽

Chih-Yang Chen ◽

Chun-Chieh Hsiao ◽

Robert Lin

Keyword(s):

College Students ◽

Heart Rate ◽

Physical Fitness ◽

Cardiorespiratory Fitness ◽

Heart Rate Recovery ◽

Step Test ◽

Exercise Heart Rate ◽

Regular Exercise ◽

Heart Rate Monitoring

According to statistics in Taiwan, the proportion of students engaged in regular exercise has declined drastically with the increase in education level. This study thus aims to provide a platform for monitoring of group cardiorespiratory fitness to allow users such as teachers or coaches to easily monitor a group’s exercise condition, intensity and duration to increase exercise efficiency, promote exercise motivation and reduce exercise risk. Based on group measurement concept and wearable chest strap textiles integrated with heart rate monitoring devices, teachers or coaches can immediately acquire and display all heart rate information on a notebook computer together with synchronous field projection display. The acquired heart rate data can also be automatically recorded and analyzed to assist in assessing the physical fitness. Our proposed platform aims to monitor the cardiorespiratory fitness in group mainly for college students and young office worker. To validate the stability of our platform in the long term, we recruited the college students in a physical fitness class, 35 in total, as the subjects for long term observation. In the experiments the subjects are divided into “varsity group” and “sedentary group” according to whether they are with or without regular exercise habits. Subjects wearing chest straps were instructed to take the 3-minute Step Test and the 5-minute constant intensity exercise test. The results show that the “varsity group” has a lower resting heart rate ([Formula: see text][Formula: see text]bpm vs. [Formula: see text][Formula: see text]bpm), a lower exercise heart rate ([Formula: see text][Formula: see text]bpm vs. [Formula: see text][Formula: see text]bpm) and a lower mean heart rate ([Formula: see text][Formula: see text]bpm vs. [Formula: see text][Formula: see text]bpm). The “Varsity group” also has a higher heart rate recovery percentage at the first minute ([Formula: see text] vs. [Formula: see text]) and the second minute ([Formula: see text] vs. [Formula: see text]). Moreover, all these indexes have a high correlation with the fitness index in the 3-minute Step Test, among which the percentage of heart rate recovery in the first minute shows the highest positive correlation ([Formula: see text], [Formula: see text]). Our wearable heart rate monitoring system can thus be deemed as effective to provide a platform for measurement of group heart rates and for assessment of cardiorespiratory fitness.

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Impact of unhealthy lifestyle on cardiorespiratory fitness and heart rate recovery of medical science students

BMC Public Health ◽

10.1186/s12889-020-09154-x ◽

2020 ◽

Vol 20 (1) ◽

Cited By ~ 1

Author(s):

Lampson M. Fan ◽

Adam Collins ◽

Li Geng ◽

Jian-Mei Li

Keyword(s):

Heart Rate ◽

Cardiorespiratory Fitness ◽

Heart Rate Recovery ◽

Medical Science ◽

Science Students ◽

Unhealthy Lifestyle

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Abstract P287: Cardiorespiratory Fitness is Associated With Ambulatory Blood Pressure in Adolescents

Circulation ◽

10.1161/circ.137.suppl_1.p287 ◽

2018 ◽

Vol 137 (suppl_1) ◽

Author(s):

Eunduck Park ◽

Devin Volding ◽

Wendell Taylor ◽

Wenyaw Chan ◽

Janet Meininger

Keyword(s):

Blood Pressure ◽

Heart Rate ◽

Cardiorespiratory Fitness ◽

Ambulatory Blood Pressure ◽

Cardiovascular Health ◽

Heart Rate Recovery ◽

Step Test ◽

Central Adiposity ◽

Cross Sectional ◽

Unit Increase

Introduction: Low cardiorespiratory fitness (fitness) and high levels of adiposity are independently associated with higher levels of blood pressure in adolescents. However, it remains uncertain whether the associations between fitness and blood pressure are due to fitness itself or results from lower levels of adiposity. Moreover, there are no studies that have determined the extent to which adiposity, including central adiposity, moderates the association between fitness and 24-hour ambulatory blood pressure (ABP). Hypotheses: 1. Higher levels of fitness will be associated with lower levels of ambulatory systolic (SBP) and diastolic (DBP) blood pressure after adjusting for adiposity and covariates. 2. With adjustments for covariates, adiposity (body mass index [BMI], waist circumference [WC]) will modify the association between fitness and 24-hour SBP and DBP. Methods: A cross-sectional study was conducted in Houston, TX with a sample of 370 adolescents aged 11-16 years. Demographically, the sample was 54% female, 37% African American, 31% Hispanic, 29% non-Hispanic white, and 3% other ethnic/racial groups. Fitness was assessed by a height-adjusted step test and estimated by heart rate recovery, defined as the difference between peak heart rate during exercise and heart rate two minutes post-exercise. Adiposity was measured using dichotomized values for percentiles of BMI (≥ 85 th ) and WC (≥ 50 th ). Ambulatory SBP and DBP (Spacelabs model 90207) were measured every 30-60 minutes over 24 hours on a school day. Mixed-effects regression analysis was used to test the hypotheses with the following covariates: activity, location, and position at the time of each ABP measurement, height, age, sex, ethnicity, sexual maturation level, and mother’s education level. Results: Hypothesis 1: Each unit increase in fitness was associated with a decrease of SBP (-0.058 mmHg, p = 0.001) and DBP (-0.043 mmHg, p < 0.0001) after adjustment for WC and covariates. Each unit increase in fitness was associated with a decrease in SBP (-0.058 mmHg, p = 0.001) and DBP (-0.045 mmHg, p < 0.0001) after adjustment for BMI and covariates. Hypothesis 2: Fitness and BMI ≥ 85 th percentile (or WC ≥ 50 th percentile) interactions were not significantly associated with ambulatory SBP or DBP after adjustment for covariates. Conclusions: Our findings indicate a small but statistically significant inverse effect of fitness on 24-hour ABP in adolescents, and no evidence of a modifying effect of adiposity on this association. Further research is needed to better understand the protective role of fitness on cardiovascular health in adolescents.

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Study of heart rate recovery and cardiovascular autonomic modulation in healthy participants after submaximal exercise

Scientific Reports ◽

10.1038/s41598-021-83071-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Tábata P. Facioli ◽

Stella V. Philbois ◽

Ada C. Gastaldi ◽

Daniel S. Almeida ◽

Karina D. Maida ◽

...

Keyword(s):

Blood Pressure ◽

Heart Rate ◽

Spectral Analysis ◽

Cardiorespiratory Fitness ◽

Exercise Test ◽

Heart Rate Recovery ◽

Cardiopulmonary Exercise Test ◽

Fluctuation Analysis ◽

Autonomic Modulation ◽

Cardiopulmonary Exercise

AbstractHeart rate variability (HRV), blood pressure variability (BPV), and baroreflex sensitivity (BRS) provide important information on cardiovascular autonomic control. However, little is known about the reorganization of HRV, BPV, and BRS after aerobic exercise. While there is a positive relationship between heart rate (HR) recovery rate and cardiorespiratory fitness, it is unclear whether there is a relationship between cardiorespiratory fitness and reorganization of cardiovascular autonomic modulation during recovery. Thus, this study aimed to investigate whether cardiorespiratory fitness influences the cardiovascular autonomic modulation recovery, after a cardiopulmonary exercise test. Sixty men were assigned into groups according to their cardiorespiratory fitness: low cardiorespiratory fitness (LCF = VO2: 22–38 mL kg−1 min−1), moderate (MCF = VO2: 38–48 mL kg−1 min−1), and high (HCF = VO2 > 48 mL kg−1 min−1). HRV (linear and non-linear analysis) and BPV (spectral analysis), and BRS (sequence method) were performed before and after a cardiopulmonary exercise test. The groups with higher cardiorespiratory fitness had lower baseline HR values and HR recovery time after the cardiopulmonary exercise test. On comparing rest and recovery periods, the spectral analysis of HRV showed a decrease in low-frequency (LF) oscillations in absolute units and high frequency (HF) in absolute and normalized units. It also showed increases in LF oscillations of blood pressure. Nonlinear analysis showed a reduction in approximate entropy (ApEn) and in Poincare Plot parameters (SD1 and SD2), accompanied by increases in detrended fluctuation analysis (DFA) parameters α1 and α2. However, we did not find differences in cardiovascular autonomic modulation parameters and BRS in relation to cardiorespiratory fitness neither before nor after the cardiopulmonary test. We concluded that cardiorespiratory fitness does not affect cardiovascular autonomic modulations after cardiopulmonary exercise test, unlike HR recovery.

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