scholarly journals A Guide to Nature Immersion: Psychological and Physiological Benefits

2020 ◽  
Vol 17 (16) ◽  
pp. 5989
Author(s):  
Pei Yi Lim ◽  
Denise Dillon ◽  
Peter K. H. Chew
Keyword(s):  
Heart Rate ◽  
Mixed Model ◽  
Short Form ◽  
Baseline Heart Rate ◽  
Natural Environments ◽  
Psychological Benefits ◽  
Standard Sequence ◽  
Effective Manner ◽  
Nature Connectedness ◽  
Nature Immersion

Nature exposure has been renowned for its positive physiological and psychological benefits. Recent years have seen a rise in nature immersion programs that make use of Guided Forest Therapy walks in a standard sequence of sensory awareness activities to expose participants to natural environments in a safe but effective manner. The study aimed to compare the efficacy of guided versus unguided nature immersion, upon three dependent variables of mood, nature connectedness and heartrate. 51 participants were assigned to either guided or unguided nature immersion. Nature connectedness (Connectedness to Nature Scale, CNS), Environmental Identity Scale, EID short form) and mood (Positive and Negative Affect Scale, PANAS) were assessed before and after nature immersion, while heart rate was tracked continuously by a wristwatch heart rate tracker throughout the 2-h experience. Demographics and general health practice (GHP) information were also collected. A mixed model ANOVA revealed that nature connectedness and mood (but not heart rate) improved post-immersion for all participants. Comparing the guided/unguided conditions, there were no significant differences in the change in nature connectedness, mood or heart rate. Comparing within the five segments within the standard sequence in the guided condition, the third and fifth segments revealed a significantly lower heart rate compared to the baseline heart rate.

scholarly journals Usefulness of Linear Mixed-Effects Models to Assess the Relationship between Objective and Subjective Internal Load in Team Sports

2021 ◽  
Vol 18 (2) ◽  
pp. 392
Author(s):  
Alice Iannaccone ◽  
Daniele Conte ◽  
Cristina Cortis ◽  
Andrea Fusco
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Team Sports ◽  
Rating Of Perceived Exertion ◽  
Subjective Measures ◽  
Internal Load ◽  
Random Slopes ◽  
The Relationship

Internal load can be objectively measured by heart rate-based models, such as Edwards’ summated heart rate zones, or subjectively by session rating of perceived exertion. The relationship between internal loads assessed via heart rate-based models and session rating of perceived exertion is usually studied through simple correlations, although the Linear Mixed Model could represent a more appropriate statistical procedure to deal with intrasubject variability. This study aimed to compare conventional correlations and the Linear Mixed Model to assess the relationships between objective and subjective measures of internal load in team sports. Thirteen male youth beach handball players (15.9 ± 0.3 years) were monitored (14 training sessions; 7 official matches). Correlation coefficients were used to correlate the objective and subjective internal load. The Linear Mixed Model was used to model the relationship between objective and subjective measures of internal load data by considering each player individual response as random effect. Random intercepts were used and then random slopes were added. The likelihood-ratio test was used to compare statistical models. The correlation coefficient for the overall relationship between the objective and subjective internal data was very large (r = 0.74; ρ = 0.78). The Linear Mixed Model using both random slopes and random intercepts better explained (p < 0.001) the relationship between internal load measures. Researchers are encouraged to apply the Linear Mixed Models rather than correlation to analyze internal load relationships in team sports since it allows for the consideration of the individuality of players.

scholarly journals Heart rate variability and depressive symptoms: a cross-lagged analysis over a 10-year period in the Whitehall II study

2016 ◽  
Vol 46 (10) ◽  
pp. 2121-2131 ◽  
Author(s):  
V. K. Jandackova ◽  
A. Britton ◽  
M. Malik ◽  
A. Steptoe
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Depressive Symptoms ◽  
General Health Questionnaire ◽  
Antidepressant Medication ◽  
Population Based ◽  
Baseline Heart Rate ◽  
Lower Baseline ◽  
The Uk

BackgroundPeople with depression tend to have lower heart rate variability (HRV), but the temporal sequence is poorly understood. In a sample of the general population, we prospectively examined whether HRV measures predict subsequent depressive symptoms or whether depressive symptoms predict subsequent levels of HRV.MethodData from the fifth (1997–1999) and ninth (2007–2009) phases of the UK Whitehall II longitudinal population-based cohort study were analysed with an average follow-up of 10.5 years. The sample size for the prospective analysis depended on the analysis and ranged from 2334 (644 women) to 2276 (602 women). HRV measures during 5 min of supine rest were obtained. Depressive symptoms were evaluated by four cognitive symptoms of depression from the General Health Questionnaire.ResultsAt follow-up assessment, depressive symptoms were inversely associated with HRV measures independently of antidepressant medication use in men but not in women. Prospectively, lower baseline heart rate and higher HRV measures were associated with a lower likelihood of incident depressive symptoms at follow-up in men without depressive symptoms at baseline. Similar but statistically insignificant associations were found in women. Adjustments for known confounders including sociodemographic and lifestyle factors, cardiometabolic conditions or medication did not change the predictive effect of HRV on incident depressive symptoms at follow-up. Depressive symptoms at baseline were not associated with heart rate or HRV at follow-up in either sex.ConclusionsThese findings are consistent with an aetiological role of the autonomic nervous system in depression onset.

Anabolic-androgenic steroids: Effects on social behavior and baseline heart rate.

1990 ◽  
Vol 9 (6) ◽  
pp. 774-791 ◽  
Author(s):  
W. Jack Rejeski ◽  
Edward Gregg ◽  
Jay R. Kaplan ◽  
Stephen B. Manuck
Keyword(s):  
Heart Rate ◽  
Social Behavior ◽  
Anabolic Androgenic Steroids ◽  
Baseline Heart Rate ◽  
Androgenic Steroids

Abstract 2140: Infrequent Need for Pacing Following Implantable Cardioverter-Defibrillator Shocks: Analysis of the Sudden Cardiac Death in Heart Failure Trial

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Jordan M Prutkin ◽  
Jeanne E Poole ◽  
George Johnson ◽  
Jill Anderson ◽  
Daniel B Mark ◽  
...  
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Sudden Cardiac Death ◽  
Cardiac Death ◽  
Nyha Class ◽  
Prior History ◽  
Baseline Heart Rate ◽  
Implantable Cardioverter Defibrillators ◽  
Heart Failure Trial ◽  
Post Shock

Background: Implantable cardioverter-defibrillators (ICD) are routinely programmed to pace after a shock to prevent possible asystole. In those with no prior history of bradycardia, there is little data regarding the prevalence and characteristics of those who use post-shock pacing (PSP). Methods: We analyzed the occurrence of pacing within the first nine beats after the first successful ICD shock for ventricular tachycardia (VT) or ventricular fibrillation (VF) in the Sudden Cardiac Death in Heart Failure Trial (SCD-HeFT). All ICDs were single lead with the first PSP delivered at 1400msec and all subsequent stimuli delivered at 1200msec. We excluded patients with pacing during pre-shock rhythms and those who had pacing rates different than the protocol default rate of 50bpm (1200 msec). Results: There were 2521 patients enrolled in SCD-HeFT, of which 811 received an ICD. A total of 153 shock events were examined; 36 (23.5%) had at least one of the first nine beats paced post-shock, though only 4 (2.5%) had greater than 4 out of the 9 beats paced. No subjects needed pacing for all nine beats and only 8 (5.2%) paced for greater than 5 seconds. There were no differences in age, gender, etiology of cardiomyopathy, or NYHA class between those with PSP or not. The prevailing heart rate pre-shock was predictive of PSP; the mean cycle length of the baseline rhythm pre-shock was longer (slower rate) for those who used PSP (735 ± 228msec vs. 624 ± 158msec, P=0.001). More often, VF (vs. VT) was the rhythm shocked in those using PSP (P=0.015). A trend also was seen toward increased frequency of PSP in those receiving 30J shocks (16 of 49) versus ≤20J shocks (20 of 104, P=0.068). Conclusion: Patients infrequently require multiple paced beats post-shock for VT or VF. Patients using PSP have a slower baseline heart rate and are more likely to have VF as the shocked rhythm. While 1 or 2 paced beats out of the first nine occurred occasionally, these patients also had rapid return of their native rhythm for which the hemodynamic contribution of 1 or 2 paced beats is unclear. These data suggest that for most patients receiving a primary prevention ICD programmed for shock-only therapy, the need for PSP is limited. PSP use may reflect convention and the assumption that minor post-shock pauses are detrimental.

Comparison of Baseline Heart Rate Variability in Stable Ischemic Heart Disease Patients with and without Stroke in Long-Term Observation

2016 ◽  
Vol 25 (10) ◽  
pp. 2526-2534 ◽  
Author(s):  
Michał Kuzemczak ◽  
Paulina Białek-Ławniczak ◽  
Katarzyna Torzyńska ◽  
Agnieszka Janowska-Kulińska ◽  
Izabela Miechowicz ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Heart Disease ◽  
Ischemic Heart Disease ◽  
Ischemic Heart ◽  
Baseline Heart Rate ◽  
Stable Ischemic Heart Disease ◽  
Long Term Observation

scholarly journals Heart rate responses to a muscarinic agonist in rats with experimentally induced acute and subacute chagasic myocarditis

2000 ◽  
Vol 42 (4) ◽  
pp. 219-224 ◽  
Author(s):  
Argenis TORRES ◽  
Diego F. DÁVILA ◽  
Carlos F. GOTTBERG ◽  
Jose H. DONIS ◽  
Gabriela ARATA DE BELLABARBA ◽  
...  
Keyword(s):  
Heart Rate ◽  
Sinus Node ◽  
Regression Line ◽  
Acute Stage ◽  
Baseline Heart Rate ◽  
Muscarinic Agonist ◽  
Parasympathetic Innervation ◽  
Subacute Stage ◽  
Old Rats ◽  
Experimentally Induced

We administered arecoline to rats, with experimentally induced chagasic myocarditis, in order to study the sinus node sensitivity to a muscarinic agonist. Sixteen month old rats were inoculated with 200,000 T. cruzi parasites ("Y" strain). Between days 18 and 21 (acute stage), 8 infected rats and 8 age-matched controls received intravenous arecoline as a bolus injection at the following doses: 5.0, 10.0, 20.0, 40.0, and 80.0 mug/kg. Heart rate was recorded before, during and after each dose of arecoline. The remaining 8 infected animals and 8 controls were subjected to the same experimental procedure during the subacute stage, i.e., days 60 to 70 after inoculation. The baseline heart rate, of the animals studied during the acute stage (349 ± 68 bpm, mean ± SD), was higher than that of the controls (250 ± 50 bpm, p < 0.005). The heart rate changes were expressed as percentage changes over baseline values. A dose-response curve was constructed for each group of animals. Log scales were used to plot the systematically doubled doses of arecoline and the induced-heart rate changes. The slope of the regression line for the acutely infected animals (r = - 0.99, b =1.78) was not different from that for the control animals (r = - 0.97, b = 1.61). The infected animals studied during the subacute stage (r = - 0.99, b = 1.81) were also not different from the age-matched controls (r = - 0.99, b = 1.26, NS). Consequently, our results show no pharmacological evidence of postjunctional hypersensitivity to the muscarinic agonist arecoline. Therefore, these results indirectly suggest that the postganglionic parasympathetic innervation, of the sinus node of rats with autopsy proved chagasic myocarditis, is not irreversibly damaged by Trypanosoma cruzi.

scholarly journals Movement-induced heart rate changes in epileptic and non-epileptic seizures

2009 ◽  
Vol 67 (3b) ◽  
pp. 789-791 ◽  
Author(s):  
Gisele R. de Oliveira ◽  
Francisco de A.A. Gondim ◽  
Edward R. Hogan ◽  
Francisco H. Rola
Keyword(s):  
Heart Rate ◽  
Motor Activity ◽  
Rate Increase ◽  
Epileptic Seizures ◽  
Baseline Heart Rate ◽  
Heart Rate Increase ◽  
Event Duration ◽  
Rate Analysis ◽  
Heart Rate Analysis ◽  
Video Eeg

Heart rate changes are common in epileptic and non-epileptic seizures. Previous studies have not adequately assessed the contribution of motor activity on these changes nor have evaluated them during prolonged monitoring. We retrospectively evaluated 143 seizures and auras from 76 patients admitted for video EEG monitoring. The events were classified according to the degree of ictal motor activity (severe, moderate and mild/absent) in: severe epileptic (SE, N=17), severe non-epileptic (SNE, N=6), moderate epileptic (ME, N=28), moderate non-epileptic (MNE, N=11), mild epileptic (mE, N=35), mild non-epileptic (mNE, N=33) and mild aura (aura, N=13). Heart rate increased in the ictal period in severe epileptic, severe non-epileptic, moderate epileptic and mild epileptic events (p<0.05). Heart rate returned to baseline levels during the post ictal phase in severe non-epileptic seizures but not in severe epileptic patients. Aura events had a higher baseline heart rate. A cut-off of 20% heart rate increase may distinguish moderate epileptic and mild epileptic events lasting more than 30 seconds. In epileptic seizures with mild/absent motor activity, the magnitude of heart rate increase is proportional to the event duration. Heart rate analysis in seizures with different degrees of movement during the ictal phase can help to distinguish epileptic from non-epileptic events.

scholarly journals A Pilot Study of the Evaluation of Using Antibiotics in Sepsis Patients in Palu, Indonesia

2020 ◽  
Vol 8 (B) ◽  
pp. 1036-1040
Author(s):  
Alwiyah Mukaddas ◽  
Tatat Rahmita Utami ◽  
Amelia Rumi
Keyword(s):  
Heart Rate ◽  
Pilot Study ◽  
Body Temperature ◽  
Respiration Rate ◽  
Descriptive Analysis ◽  
Kidney Injury ◽  
Baseline Heart Rate ◽  
Inclusion Criteria ◽  
Average Value ◽  
Gcs Score

BACKGROUND: Treatment therapy with antibiotics is one of the factors supporting success in the treatment of sepsis. AIM: This study aims to evaluate the use of antibiotics in patients with sepsis using parameters of the day of decline in body temperature, heart rate, respiration rate, changes in consciousness status, and comorbid factors. MATERIALS AND METHODS: The design of this study is pilot study with a retrospective approach on sample of 14 sepsis patients who met the inclusion criteria. Descriptive analysis using the univariate method for see changes in levels of body temperature, length of stay, respiration rate, heart rate, comorbid factors, and changes in the consciousness status. RESULTS: The results showed an average value for decline of body temperature after using antibiotics with a baseline of 38.47°C–37.87°C, heart rate shows the average value from baseline heart rate after using antibiotics from baseline of 110.8 bpm to 88.4 bpm, the respiration rate shows the average value for the respiration rate after using antibiotics from baseline of 30.8 x/min to 22.1 x/min, Glasgow Coma Scale (GCS) score showed an average value after using antibiotics from baseline 9 to 7, on comorbid factors showing six patients with one comorbid and eight patients with more than 1 comorbid factor. CONCLUSION: The study concluded that body temperature is still in the category of fever, heart rate, and respiration rate which are the normal category, patient consciousness is still at the level of somnolence even though patient’s GCS score has decreased, and patients with one factor of comorbidities are faster in death because they have a fatal type of comorbid such as acute of hepatitis, coma hepaticum, and acute kidney injury.

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