scholarly journals Microcirculatory and Metabolic Responses during Voluntary Cycle Ergometer Exercise with a Whole-Body Neuromuscular Electrical Stimulation Device

2021 ◽  
Vol 11 (24) ◽  
pp. 12048
Author(s):  
Kaori Ochiai ◽  
Yuma Tamura ◽  
Masato Terashima ◽  
Tomoki Tsurumi ◽  
Takanori Yasu
Keyword(s):  
Electrical Stimulation ◽  
Neuromuscular Electrical Stimulation ◽  
Cycle Ergometer ◽  
Whole Body ◽  
Oxygen Intake ◽  
Exercise Programs ◽  
Cycle Ergometer Exercise ◽  
Blood Fluidity ◽  
Ergometer Exercise

Vigorous exercise increases blood viscosity and may pose a risk of cardiovascular events in patients with cardiovascular diseases. We recently reported that single-use of novel whole-body neuromuscular electrical stimulation (WB-NMES) can be safely applied in healthy subjects without adversely affecting blood fluidity. We performed a crossover study to explore the effectiveness and safety of a hybrid exercise with ergo-bicycle and WB-NMES; 15 healthy volunteers, aged 23–41 years, participated in this study. No arrhythmias were detected during the hybrid exercise and 20 min recovery, and although blood fluidity was transiently exacerbated immediately after both the exercise programs, in vivo parameters in the sublingual and nailfold microcirculation remained unchanged. There was a significant decrease in blood glucose and increase in lactic acid levels immediately after both exercise programs. Even with the same workload as the cycle ergometer exercise, the oxygen intake during the hybrid exercise remained higher than that during the cycle ergometer exercise alone (p < 0.05, r = 0.79, power = 0.81). Both the hybrid and voluntary cycle ergometer exercises transiently exacerbated blood fluidity ex vivo; however, microvascular flow was not adversely affected in vivo.

scholarly journals Effects of whole-body neuromuscular electrical stimulation device on hemodynamics, arrhythmia, and sublingual microcirculation

2021 ◽  
Author(s):  
Megumi Hoshiai ◽  
Kaori Ochiai ◽  
Yuma Tamura ◽  
Tomoki Tsurumi ◽  
Masato Terashima ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Blood Glucose ◽  
Blood Lactate ◽  
Neuromuscular Electrical Stimulation ◽  
Whole Body ◽  
Left Ventricular Ejection ◽  
Sublingual Microcirculation ◽  
Blood Fluidity ◽  
Lactate Levels ◽  
Blood Lactate Levels

AbstractNeuromuscular electrical stimulation has been used to treat cardiovascular diseases and other types of muscular dysfunction. A novel whole-body neuromuscular electrical stimulation (WB-NMES) wearable device may be beneficial when combined with voluntary exercises. This study aimed to investigate the safety and effects of the WB-NMES on hemodynamics, arrhythmia, and sublingual microcirculation. The study included 19 healthy Japanese volunteers, aged 22–33 years, who were not using any medication. Electrocardiogram (ECG), echocardiography, and blood sampling were conducted before a 20-min WB-NMES session and at 0 and 10 min after termination of WB-NMES. Their tolerable maximum intensity was recorded using numeric rating scale. Arrhythmia was not detected during neuromuscular electrical stimulation or during 10 min of recovery. Blood pressure, heart rate, left ventricular ejection fraction, and diastolic function remained unchanged; however, mild mitral regurgitation was transiently observed during WB-NMES in a single male participant. A decrease in blood glucose and an increase in blood lactate levels were observed, but no changes in blood fluidity, sublingual microcirculation, blood levels of noradrenaline, or oxidative stress were shown. WB-NMES is safe and effective for decreasing blood glucose and increasing blood lactate levels without changing the blood fluidity or microcirculation in healthy people.

Effect of hydration state of circulatory and thermal regulations

1980 ◽  
Vol 49 (4) ◽  
pp. 715-721 ◽  
Author(s):  
E. R. Nadel ◽  
S. M. Fortney ◽  
C. B. Wenger
Keyword(s):  
Blood Flow ◽  
Body Weight Loss ◽  
Cycle Ergometer ◽  
Whole Body ◽  
Ergometer Exercise ◽  
Hydration State ◽  
A Minor ◽  
Cutaneous Blood ◽  
Influence Of Hydration ◽  
Volume Decrease

To determine the influence of hydration state upon circulatory controls, we studied four relatively fit subjects during duplicate 30-min cycle ergometer exercise bouts (55% VO2max) in euhydrated, hypohydrated, and hyperhydrated conditions. Ambient temperature was 35 degrees C. Hypohydration was achieved by 4 days of diuretic administration and resulted in a whole-body weight loss of 2.2 kg and a plasma volume decrease of approximately 700 ml. Hyperhydration was achieved by ADH administration plus ingestion of 2 liters water but caused only a minor increase volume. Hypohydration resulted in a significantly reduced cardiac output during exercise; this the result of a reduction in stroke volume of 17 ml.beat-1 without adequate elevation in heart rate. the internal temperature (Tes) threshold for cutaneous vasodilation was elevated by 0.42 degree C in hypohydrated conditions; but once vasodilation occurred, the slope of the arm blood flow:Tes relation was unchanged from control. Maximal arm blood flow was reduced by nearly 50% in hypohydration. These restrictions in cutaneous blood flow served to maintain an already compromised venous return, but due to the limitation of core-to-skin heat transfer, forced Tes to nearly 39 degrees C, significantly higher than in euhydrated conditions.

scholarly journals COMPARISON OF THE ACCUSPORT, YSI 1500, AND YSI 23L LACTATE ANALYZERS DURING PROGRESSIVE CYCLE ERGOMETER EXERCISE

1998 ◽  
Vol 30 (Supplement) ◽  
pp. 34
Author(s):  
D. S. Miles ◽  
M. H. Cox ◽  
T. J. Verde ◽  
M. I. Evangelisti ◽  
C. D. Moser ◽  
...  
Keyword(s):  
Cycle Ergometer ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise

Effects of pregnancy and chronic exercise on maternal cardiac structure and function

1999 ◽  
Vol 77 (11) ◽  
pp. 909-917 ◽  
Author(s):  
L A Wolfe ◽  
R J Preston ◽  
G W Burggraf ◽  
M J McGrath
Keyword(s):  
Heart Rate ◽  
Resting State ◽  
Cycle Ergometer ◽  
Structure And Function ◽  
Cardiac Structure ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Aerobic Conditioning ◽  
Cardiac Structure And Function ◽  
And Function

This study examined the interactive effects of pregnancy and aerobic conditioning on maternal cardiac structure and function. Effects of closely monitored cycle ergometer conditioning were studied during the second (TM2) and third trimesters (TM3) in 22 previously sedentary pregnant women (exercised group, EG) and a nonexercising pregnant control group with similar characteristics (CG, n = 19). Subjects were studied in the resting state by two-dimensional echocardiography and during cycle ergometer exercise at three steady-state power outputs at the start of TM2 (ENTRY), at the end of TM2 and TM3 (postconditioning), and 3-4 months postpartum (NPR, nonpregnant reference, CG only). Aerobic conditioning did not increase left ventricular dimensions beyond those attributable to pregnancy itself. In addition, in contrast with previous studies of nonpregnant women, physical conditioning during pregnancy did not reduce heart rate (HR) in the resting state. During exercise, the slope of the HR versus oxygen uptake (Vo2) regression decreased significantly between preconditioning and the end of TM3 in the EG, suggesting that training-induced reductions in HR become more evident with increasing exercise intensity. Also, significant reductions in oxygen pulse (Vo2/HR) were observed at all three work rates in the CG, but not in the EG. These findings support the hypothesis that the cardiovascular effects of aerobic conditioning are obscured by more powerful effects of pregnancy in the resting state but become "unmasked" during strenuous exercise.Key words: human gestation, cycle ergometer exercise, echocardiography, heart rate, stroke volume.

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