783 Effect of physical and mental stress on HR and HRV before and after exercise training among patients with cardiac diseases

2007 ◽  
Vol 6 (1) ◽  
pp. 179-179
Author(s):  
S CARLES ◽  
D CURNIER ◽  
A PATHAK ◽  
J RONCALLI ◽  
M BOUSQUET ◽  
...  
Keyword(s):  
Exercise Training ◽  
Mental Stress ◽  
Cardiac Diseases ◽  
Before And After

scholarly journals Effects of aerobic exercise training on sympathetic and renal responses to mental stress in humans

2010 ◽  
Vol 298 (1) ◽  
pp. H229-H234 ◽  
Author(s):  
Chester A. Ray ◽  
Jason R. Carter
Keyword(s):  
Heart Rate ◽  
Exercise Training ◽  
Aerobic Exercise ◽  
Mental Stress ◽  
Muscle Sympathetic Nerve Activity ◽  
Aerobic Exercise Training ◽  
Vascular Responses ◽  
Healthy Humans ◽  
Before And After ◽  
Renal Vascular

The effects of aerobic exercise training (ET) on muscle sympathetic nerve activity (MSNA) and renal vascular responses to mental stress (MS) have not been determined in humans. We hypothesized that aerobic ET would reduce MSNA and renal vasoconstriction during MS. MSNA, mean arterial pressure (MAP), heart rate, renal blood flow velocity (RBFV), and peak oxygen uptake (V̇o2 peak) were recorded in 23 healthy adults. Fourteen subjects participated in 8 wk of aerobic ET, while nine subjects served as sedentary controls (Con). ET significantly increased V̇o2 peak (Δ18 ± 1%; P < 0.001) and decreased RBFV at rest (60 ± 4 to 48 ± 3 cm/s; P < 0.01), whereas Con did not alter V̇o2 peak or RBFV. ET did not alter resting MSNA (11 ± 1 to 9 ± 1 bursts/min) or MAP (84 ± 2 to 83 ± 2 mmHg), and these findings were similar in the Con group. MS elicited similar increases in MSNA (∼Δ2 bursts/min; P < 0.05), MAP (∼Δ15 mmHg; P < 0.001), and heart rate (∼Δ20 beats/min; P < 0.001) before and after ET, and the responses were not different between ET and Con. Likewise, MS elicited similar decreases in RBFV and renal vascular conductance before and after ET, and the responses were not different between ET and Con. Perceived stress levels during MS were similar before and after the 8-wk study in both ET and Con. In conclusion, ET does not alter MSNA and renal vascular responses to MS in healthy humans.

scholarly journals Effects of Feeding Time on Markers of Muscle Metabolic Flexibility Following Acute Aerobic Exercise in Trained Mice Undergoing Time Restricted Feeding

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1717
Author(s):  
Aaron Persinger ◽  
Matthew Butawan ◽  
Martina Faietti ◽  
Ashley Pryke ◽  
Kyley Rose ◽  
...  
Keyword(s):  
Exercise Training ◽  
Performance Outcomes ◽  
Metabolic Flexibility ◽  
Feeding Time ◽  
Restricted Feeding ◽  
Physically Active ◽  
Impact Performance ◽  
Before And After ◽  
And Performance ◽  
Access To Food

Time-restricted feeding (TRF) is becoming a popular way of eating in physically active populations, despite a lack of research on metabolic and performance outcomes as they relate to the timing of food consumption in relation to the time of exercise. The purpose of this study was to determine if the timing of feeding/fasting after exercise training differently affects muscle metabolic flexibility and response to an acute bout of exercise. Male C57BL/6 mice were randomized to one of three groups for 8 weeks. The control had ad libitum access to food before and after exercise training. TRF-immediate had immediate access to food for 6 h following exercise training and the TRF-delayed group had access to food 5-h post exercise for 6 h. The timing of fasting did not impact performance in a run to fatigue despite TRF groups having lower hindlimb muscle mass. TRF-delayed had lower levels of muscle HSL mRNA expression and lower levels of PGC-1α expression but displayed no changes in electron transport chain enzymes. These results suggest that in young populations consuming a healthy diet and exercising, the timing of fasting may not substantially impact metabolic flexibility and running performance.

Exercise Training and the Speed of Self-Selected Walking Pace in Men at Retirement

1986 ◽  
Vol 5 (1) ◽  
pp. 19-26 ◽  
Author(s):  
D. A. Cunningham ◽  
P. A. Rechnitzer ◽  
A. P. Donner
Keyword(s):  
Exercise Training ◽  
Training Program ◽  
Walking Speed ◽  
Exercise Group ◽  
Cardiovascular Fitness ◽  
Blue Collar ◽  
Intervention Trial ◽  
Before And After ◽  
Exercise Endurance ◽  
One Year

ABSTRACTAn intervention trial with regular physical activity was carried out to test the hypothesis that walking speed is related to the level of cardiovascular fitness (maximal oxygen uptake). Earlier research has demonstrated that when VO2 max is held constant in a multiple regression analysis the association between walking speed and age (29–65 y) is eliminated. To describe the association between self-selected speeds of walking, and level of cardiovascular fitness, 63 men age 60 to 65 were studied before and after a 1 year program of exercise training. VO2 max was determined on a motor driven treadmill. A test of self-selected walking pace was administered over a 240 m indoor course. The men were asked to walk at 3 paces considered by the subjects to be rather slow, normal, and fast, respectively. They were randomly assigned with stratification for white and blue collar occupation to a program of exercise training (n = 33) or control (n = 27). The training program consisted of walking or jogging for 30 min three times per week for one year. After the training program the exercise group increased their VO2 max (9.5%) and their normal walking speed (1.29 to 1.43 m.s−1) significantly compared to the controls. A program of exercise endurance training will result in an increase in the speed of self-selected pace.

Cold-induced thermogenesis in younger and older Fischer 344 rats following exercise training

1988 ◽  
Vol 254 (6) ◽  
pp. R908-R916 ◽  
Author(s):  
R. B. McDonald ◽  
B. A. Horwitz ◽  
J. S. Stern
Keyword(s):  
Exercise Training ◽  
Body Mass ◽  
Cold Exposure ◽  
O2 Consumption ◽  
Fischer 344 ◽  
Before And After ◽  
Old Rats ◽  
F344 Rats ◽  
Maintain Body Temperature ◽  
Brown Fat Mitochondria

The inability of old rats to maintain body temperature during cold exposure has been well documented. This study evaluated the effect of exercise on the rates of cold-induced O2 consumption and the contribution of nonshivering thermogenesis (NST) to these rates. Younger (12 mo) and older (24 mo) male Fischer 344 (F344) rats were divided into exercised and sedentary groups. Exercised rats were run on a motor-driven treadmill 60 min/day, at 19-24 m/min, 5 days/wk for 6 mo. At the conclusion of the 6-mo training period, O2 consumption of all four groups was measured at thermoneutrality (26 degrees C) and during 6 h of exposure to 6 degrees C. Rectal temperatures were recorded before and after cold exposure. NST was estimated from the ability of isolated brown fat mitochondria to bind guanosine 5'-diphosphate (GDP). Core temperature of older sedentary rats fell 5.1 +/- 0.4 degrees C after cold exposure (36.3 +/- 0.3 vs. 31.2 +/- 0.8 degrees C). Exercise training in older animals prevented this fall from occurring (36.4 +/- 0.2 vs. 35.3 +/- 0.3 degrees C). Core temperatures of cold-exposed younger exercised and sedentary rats did not differ from thermoneutral values. Exercise did not alter the rates of resting body mass-independent (ml.min-1.kg body mass-0.67) O2 consumption in younger or older rats. However, body mass-independent and lean body mass (LBM)-independent (ml.min-1.g LBM-0.67) cold-induced O2 consumptions of older exercised rats were significantly elevated relative to those of older sedentary animals. This effect of exercise was not seen in younger rats.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Comprehensive exercise training improves ventilatory muscle function and reduces dyspnea perception in patients with COPD

2016 ◽  
Vol 71 (3) ◽  
Author(s):  
F. Cortopassi ◽  
A.A.M. Castro ◽  
E.F. Porto ◽  
M. Colucci ◽  
G. Fonseca ◽  
...  
Keyword(s):  
Exercise Training ◽  
Respiratory Muscles ◽  
Exercise Programme ◽  
Lower Limbs ◽  
Test Time ◽  
Chronic Obstructive ◽  
Endurance Test ◽  
Incremental Test ◽  
Copd Patients ◽  
Before And After

Background. Comprehensive exercise training (CET) is an efficient strategy to decrease dyspnea perception in chronic obstructive pulmonary disease (COPD) and may result in significant improvement in ventilatory muscles function. Our aim was to evaluate the effects of general exercise training on dyspnea perception and on respiratory muscles strength in COPD patients. Methods. Consecutive COPD patients were enrolled to complete a CET programme. The patients underwent a routine that included a global warm up, upper and lower limbs endurance exercise as well as stretching and relaxation. Before and after the CET programme, patients completed maximal inspiratory (PImax) and expiratory (PEmax) pressures measurements, maximal incremental test, endurance test, and 6-min walk distance (6MWD). Results. 71 patients (52 male). Mean age 67.6±8.6 years, FEV1 (%) 44.2±16.2 and Mahler dyspnea scale 6.4±1.8. The results before and after the exercise programme were: PImax 64.7±22.9 vs. 75.5±23.7 cmH2O (p=0.001), PEmax 110.8±28.1 vs. 120.4±28.1 cmH2O (p=0.004), 6MWD 510.6±90.3 vs. 528.2±99.7 metres (p=0.88), time of incremental test 672±135 vs. 856±226 sec (p&lt;0.0001). Compared with the pre exercise programme, we observed a significant reduction on Borg dyspnea scale (6.1±2.8 to 3.6±2.3, p&lt;0.0001) as well as a longer test time (504±218 to 1.038±841, p&lt;0.0001) at the end of the endurance test after CET programme. Improvement of PImax correlated negatively with dyspnea perception at iso-time during the endurance test (r= -0.33, p=0.03). Conclusions. Our results confirm that CET is associated with significant improvement in PImax, PEmax and provide evidence demonstrating that CET reduces dyspnea perception in patients with COPD.

Abstract P537: Reduced Cardiovascular Regenerative Capacity is Associated With Enhanced Inflammatory Response to Acute Psychological Stress

Circulation ◽  
2020 ◽  
Vol 141 (Suppl_1) ◽  
Author(s):  
Zakaria Almuwaqqat ◽  
Jeong Hwan Kim ◽  
Muhammad Hammadah ◽  
Shabatun Islam ◽  
Bruno B Lima ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Vascular Function ◽  
Mental Stress ◽  
Mononuclear Cells ◽  
Patient Characteristics ◽  
Adverse Outcomes ◽  
Regenerative Capacity ◽  
Vascular Regeneration ◽  
Before And After ◽  
Artery Disease

Background: Bone marrow-derived progenitor cells (PCs) are involved in vascular regeneration and correlate with vascular function and cumulative cardiovascular risk. Systemic inflammation is associated with increased mobilization and differentiation of circulating PCs (CPCs) which may ultimately lead to exhaustion of vascular regenerative capacity. Individuals with coronary artery disease (CAD) exhibit a pro-inflammatory response to a mental stress challenge that has been associated with an elevated risk of adverse outcomes. We sought to determine whether subjects with reduced numbers of circulating PCs (CPCs) are at higher risk of a pro-inflammatory response to acute mental stress. Methods: 500 outpatients with stable CAD were enrolled into the Mental Stress Ischemia Prognosis study and underwent a laboratory-based mental stress protocol. Mononuclear cells expressing CD45med, CD34 and CXCR4 epitopes, known to be enriched for hematopoietic PCs, were enumerated using flow cytometry. Interleukin-6 (IL6) and C-Reactive Protein (CRP) levels were measured before and after mental stress. Baseline and changes in IL6 levels were compared across CPC tertiles using linear regression after adjusting for patient characteristics. Results: Mean age was 63± 9 years, 77% male, 70% white. Median CD34+ CPC count was 1.64 (1.02-2.43 cells/μL. CPC levels were not associated with either the baseline IL6 level (Beta= 0.071 95%CI, -0.091, 0.23) or CRP levels (Beta, 0.60, 95%CI, -0.25, 0.44). However, independent of demographics, CAD risk factors and baseline IL6 levels, lower CD34+/CXCR4+ CPC counts were associated with a higher inflammatory response during mental stress, measured as a rise in IL6 level (Beta= -0.11, 95%CI, -0.20, -0.028). Conclusions: Patients with reduced CPC levels have a greater pro-inflammatory response to mental stress. Thus, the observed higher risk in subjects with impaired regenerative capacity might be at least partly due to a higher stress-related pro-inflammatory response.

scholarly journals Effects of Exercise Training during Christmas on Body Weight and Cardiometabolic Health in Overweight Individuals

2020 ◽  
Vol 17 (13) ◽  
pp. 4732
Author(s):  
Miguel Ramirez-Jimenez ◽  
Felix Morales-Palomo ◽  
Juan Fernando Ortega ◽  
Alfonso Moreno-Cabañas ◽  
Valle Guio de Prada ◽  
...  
Keyword(s):  
Body Weight ◽  
Exercise Training ◽  
Dietary Habits ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Pharmacological Therapy ◽  
Cardiometabolic Health ◽  
Weight Gains ◽  
Before And After ◽  
Maximal Fat Oxidation

Individuals with abdominal obesity and metabolic syndrome (MetS) have augmented risk of all-cause mortality. Lifestyle interventions are effective to treat MetS, however, there are periods during the year in which exercise programs are discontinued and improper dietary habits reappear (e.g., Christmas holidays). We aimed to analyze if exercise-training during Christmas holidays would avoid body-weight gains and cardiometabolic deterioration in MetS individuals, using a randomized control trial. Thirty-eight men with MetS undergoing exercise training were randomly allocated to either continue (TRAIN group, n = 16) or discontinue (HOLID group, n = 22) training, during the three weeks of Christmas. Anthropometrics (body weight, fat, and waist circumference), fasting blood metabolites (glucose, insulin, triglycerides, and cholesterol concentrations) and exercise maximal fat oxidation (FOMAX) and oxygen uptake (VO2PEAK) were determined before and after Christmas. Both groups were similar at baseline in all parameters (p > 0.05). HOLID group increased body weight (91.3 ± 13.0 to 92.0 ± 13.4 kg, p = 0.004), mean arterial pressure (94.0 ± 10.6 to 97.1 ± 8.9 mmHg, p = 0.026), blood insulin (10.2 ± 3.8 to 12.5 ± 5.4 µIU·mL−1, p = 0.003) and HOMA (3.2 ± 1.3 to 4.1 ± 2.3, p = 0.003). In contrast, TRAIN prevented those disarrangements and reduced total (170.6 ± 30.6 to 161.3 ± 31.3 mg·dL−1, p = 0.026) and low-density lipoprotein cholesterol (i.e., LDL-C, 104.8 ± 26.1 to 95.6 ± 21.7 mg·dL−1, p = 0.013). TRAIN also prevented the reductions in exercise FOMAX and VO2PEAK that was observed in the HOLID group (p = 0.002). In conclusion, exercise training during Christmas, prevents body weight gains and the associated cardiovascular (increase in blood pressure and LDL-C) and metabolic (reduced insulin sensitivity) health risks are an optimal non-pharmacological therapy for that period of the year.

62 Time course of improvement in secretory unbalance of asymmetric dimethylarginine and nitric oxide productions in response to exercise training in middle-aged and older adults

2020 ◽  
Vol 41 (Supplement_1) ◽  
Author(s):  
S Fujie ◽  
N Hasegawa ◽  
K Sanada ◽  
T Hamaoka ◽  
S Maeda ◽  
...  
Keyword(s):  
Older Adults ◽  
Exercise Training ◽  
Arterial Stiffness ◽  
Aerobic Exercise ◽  
Time Course ◽  
Exercise Intervention ◽  
Training Group ◽  
Middle Aged ◽  
Plasma Adma ◽  
Before And After

Abstract Funding Acknowledgements Supported by Grants-in-Aid for Scientific Research (#17H02182, #16K13059, M. Iemitsu; #18J01024, S. Fujie) Introduction Aging is well known to elevate risks of cardiovascular diseases. As a mechanism of these increased risks with aging, a reduction of nitric oxide (NO) production via augmented secretion of asymmetric dimethylarginine (ADMA), an endogenous inhibitor of NO synthesis is related. Habitual aerobic exercise has shown to improve secretory unbalance of endothelium-derived regulating factors with aging, such as increase in NO and decrease in ADMA, resulting in the reduction of arterial stiffness. However, the time course of improvement in secretory unbalance of NO and ADMA productions in response to exercise training in middle-aged and older adults remains unclear. Purpose This study aimed to determine the time course of changes in plasma nitrite/nitrate (NOx) and ADMA levels related to exercise-training effects of arterial stiffness in healthy middle-aged and older adults. Methods Thirty-two Japanese healthy middle-aged and older subjects (67 ± 1 years) were randomly divided into two groups: exercise intervention and sedentary controls. Subjects in the training group completed 8-week of aerobic exercise training (60-70% peak oxygen uptake [VO2peak] for 45 min, 3 days/week). We evaluated plasma NOx and ADMA concentrations and carotid-femoral pulse wave velocity (cfPWV) as an index of arterial stiffness, measured every 2 weeks for 8-week in the training group. Results cfPWV was gradually declined from baseline to 8-week and significantly decreased from baseline at weeks 6 (P &lt; 0.05) and 8 (P &lt; 0.01). Plasma NOx level was gradually elevated during exercise intervention and significantly increased from baseline at weeks 6 (P &lt; 0.05) and 8 (P &lt; 0.01). Interestingly, plasma ADMA level was significantly decreased at 8-week intervention (P &lt; 0.05). Furthermore, the exercise training-induced reduction in plasma ADMA level was negatively correlated with the change in plasma NOx level before and after the 8-week (r = -0.483, P &lt; 0.05). The exercise training-induced change in plasma ADMA concentration was positively correlated with training-induced change in cfPWV before and after the 8-week (r = 0.633, P &lt; 0.01). Additionally, there was a negative correlation between the changes in plasma NOx level and cfPWV before and after the 8-week (r = -0.642, P &lt; 0.05). Conclusions These results suggest that habitual aerobic exercise can normalize the secretory unbalance of NO and ADMA productions in 6 to 8 weeks, and these balance normalizations may be contributed to the reduction of arterial stiffness in the middle-aged and older adults.

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