Continuous measurement of blood pressure, heart rate and left ventricular performance during and after isometric exercise in head-out water immersion

Fujisawa, Hiroyuki; Kamimura, Hironobu; Ohtsuka, Yoshinori; Nanbu, Tadashi; Yabunaka, Noriyuki; Agishi, Yuko

doi:10.1007/bf00242289

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…In the present study the mean peak HR (during the final 30 s of exercise in the incremental isometric exercise test) was 122.6 ± 19.0 b min -1 . This was similar to a mean peak HR of 125 b min -1 , derived from five previous double-leg isometric exercise studies (Lewis et al 1985;Misner et al 1990;Fujisawa et al 1996;Smolander et al 1998;Wiles et al 2008). The selection of 95% and 75% peak HR was based on pilot work which showed that the minimum %HR peak that could be elicited successfully, when using EMG, was 75%HR peak .…”

Section: Isometric Exercise Training Sessionsmentioning

confidence: 95%

The effects of performing isometric training at two exercise intensities in healthy young males

2009

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No previous studies have examined the effects of isometric training intensity upon resting blood pressure (BP). The aims of this study were (a) to compare the effects of leg isometric training, performed at two intensities, upon resting systolic-SBP, diastolic-DBP and mean arterial-MAP BP; and (b) to examine selected cardiovascular variables, in an attempt to explain any changes in resting BP following training. Thirty-three participants were randomly allocated to either control, high- (HI) or low-intensity (LI) training for 8 weeks. Participants performed 4 x 2 min exercise bouts 3x weekly. Resting BP was measured at baseline, 4-weeks and post-training. SBP, DBP and MAP fell significantly in both groups after training. Changes were -5.2 +/- 4.0, -2.6 +/- 2.9 and -2.5 +/- 2.2 mmHg [HI]; -3.7 +/- 3.7, -2.5 +/- 4.8 and -2.6 +/- 2.5 mmHg [LI] for SBP, DBP and MAP, respectively. There were no significant changes in BP at 4 weeks. No significant changes were observed in any of the other cardiovascular variables examined. These findings suggest that isometric training causes reductions in SBP, DBP and MAP at a range of exercise intensities, when it is performed over 8 weeks. Furthermore, it is possible to reduce resting BP using a much lower isometric exercise intensity than has previously been shown.

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Section: Isometric Exercise Training Sessionsmentioning

confidence: 95%

The effects of performing isometric training at two exercise intensities in healthy young males

2009

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“…In both situations, decreased SVR can be explained by decreased sympathetic nervous activity, controlled by baroreflexes associated with the central shift of blood volume. 38 The hemodynamic improvement following activation of the pneumatic sleeves almost approached the baseline values recorded before inducing PPP. However, those initial parameters are probably lower than during wakefulness because of the effect of anesthesia.…”

Section: Commentmentioning

confidence: 83%

“…The increased transdiaphragmatic pressure is sufficient to draw additional blood into the thorax, thus increasing venous return. By redistributing blood from the peripheral dependent regions to the thorax, immersion causes enhanced diastolic filling of the right atrium and ventricle, evoking the Starling mechanism, thus increasing SV and CO. [35][36][37][38] In our experimental group, the abdominal cavity and lower limbs were under atmospheric pressure plus the pressure equivalent to PPP, created by the insufflated carbon dioxide and the pneumatic sleeves, and additional pressure on the legs in case of anti-Trendelenburg positioning. This counterbalanced the gravitational effects on blood distribution, thus mimicking the effect of headout immersion, in which the higher venous blood pressure in the peripheral dependent areas is counterbalanced by the higher hydrostatic pressure.…”

Section: Commentmentioning

confidence: 99%

Reversal of Adverse Hemodynamic Effects of Pneumoperitoneum by Pressure Equilibration

Bickel¹

2004

Arch Surg

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The creation of positive-pressure pneumoperitoneum during laparoscopic operations can lead to adverse hemodynamic changes, mainly decreased cardiac output. We hypothesized that pneumatic compression sleeves worn on the legs during pneumoperitoneum could abolish the pressure gradient between the abdominal cavity and the legs and so eliminate these adverse hemodynamic changes. Design: Prospective, randomized, controlled clinical trial with an additional calibration group. Setting: A regional referral center. Patients: Forty-five consecutive patients undergoing laparoscopic cholecystectomy who developed hemodynamic changes on induction of positive-pressure pneumoperitoneum were randomized to 3 groups. Interventions: Low-pressure, nonsequential pneumatic compression sleeves, wrapped around the legs, were used to equilibrate the pressure gradient in the study group and to gradually exceed it in the calibration group. In the control group, no sleeves were used. Main Outcome Measures: Transesophageal Dop-pler cardiac output, stroke volume, and systemic vascular resistance were monitored noninvasively. Results: The creation of positive-pressure pneumoperitoneum caused a significant decrease of cardiac output and stroke volume and increased systemic vascular resistance. In the experimental groups of patients, pressurizing the sleeves to the pneumoperitoneal pressure caused a significant increase of cardiac output (from 4.82 to 6.74 L/min), increased stroke volume, and decreased systemic vascular resistance (PϽ.001). This was not seen in the control group. Additional gradual pressure increase in the sleeves of the calibration group produced no further improvement. Releasing the pressure abolished the hemodynamic advantages. Conclusions: Applying pressure on the legs equivalent to the positive-pressure pneumoperitoneum improves hemodynamic performance during pneumoperitoneum by nullifying the pressure gradient that is responsible for the adverse consequences. This might be of major practical value, especially for cardiac patients undergoing prolonged laparoscopic operations.

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“…Among these studies, the vast majority (76.5%) performed the handgrip, followed by knee extension (13.7%) (Table 1 , Ref. [ 8 , 13 , 18 , 19 , 20 , 22 , 23 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 ...…”

Section: Resultsmentioning

confidence: 99%

Acute Blood Pressure Response to Different Types of Isometric Exercise: A Systematic Review with Meta-Analysis

CONEGLIAN¹,

BARCELOS²,

BANDEIRA³

et al. 2023

Rev. Cardiovasc. Med.

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Background: This study aimed to identify the blood pressure (BP) responses during different types of isometric exercises (IE) in adults and to evaluate whether BP responses according to IE is influenced by the characteristics of participants and exercise protocols. Methods:The search was conducted in PubMed, Cochrane Central, SPORTDiscus, and LILACS databases in June 2020. Random effects models with a 95% confidence interval and p < 0.05 were used in the analyses. Results: Initially, 3201 articles were found and, finally, 102 studies were included in this systematic review, seven of which were included in the meta-analysis comparing handgrip to other IE. Twoknee extension and deadlift promoted greater increases in systolic (+9.8 mmHg; p = 0.017; I 2 = 74.5% and +26.8 mmHg; p ≤ 0.001; I 2 = 0%, respectively) and diastolic (+7.9 mmHg; p = 0.022; I 2 = 68.6% and +12.4 mmHg; p ≤ 0.001; I 2 = 36.3%, respectively) BP compared to handgrip. Men, middle-aged/elderly adults, hypertensive individuals, and protocols with higher intensities potentiate the BP responses to handgrip exercise (p ≤ 0.001). Conclusions: IE involving larger muscle groups elicit greater BP responses than those involving smaller muscle masses, especially in men, middle-aged/elderly adults and hypertensive individuals. Future studies should directly compare BP responses during various types of IE in different populations.

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Continuous measurement of blood pressure, heart rate and left ventricular performance during and after isometric exercise in head-out water immersion

Cited by 4 publications

References 21 publications

The effects of performing isometric training at two exercise intensities in healthy young males

The effects of performing isometric training at two exercise intensities in healthy young males

Reversal of Adverse Hemodynamic Effects of Pneumoperitoneum by Pressure Equilibration

Acute Blood Pressure Response to Different Types of Isometric Exercise: A Systematic Review with Meta-Analysis

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