Isometric handgrip exercise improves acute neurocardiac regulation

Millar, Philip J.; MacDonald, Maureen J.; Bray, Steven R.; McCartney, Neil

doi:10.1007/s00421-009-1142-2

Cited by 53 publications

(43 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Only one previous study incorporating isometric training has shown a reduced resting HR 26. Millar et al27 have also reported changes in the neurocardiac control following a single bout of isometric handgrip exercise which may be associated with an increase in parasympathetic activity.…”

Section: Discussionmentioning

confidence: 98%

Double-leg isometric exercise training in older men

Baross

Wiles

Swaine

2013

OAJSM

View full text Add to dashboard Cite

Double-leg isometric training has been demonstrated to reduce resting blood pressure in young men when using electromyographic activity (EMG) to regulate exercise intensity. This study assessed this training method in healthy older (45–60 years.) men. Initially, 35 older men performed an incremental isometric exercise test to determine the linearity of the heart rate versus percentage peak EMG (%EMGpeak) and systolic blood pressure versus %EMGpeak relationship. Thereafter, 20 participants were allocated to a training or control group. The training group performed three double-leg isometric sessions per week for 8 weeks, at 85% of peak heart rate. The training resulted in a significant reduction in resting systolic (11 ± 8 mmHg, P < 0.05) and mean arterial (5 ± 7 mmHg, P < 0.05) blood pressure. There was no significant change in resting systolic blood pressure for the control group or diastolic blood pressure in either group (all P > 0.05). These findings show that this training method, used previously in young men, is also effective in reducing resting systolic and mean arterial blood pressure in older men.

show abstract

Section: Discussionmentioning

confidence: 98%

Double-leg isometric exercise training in older men

Baross

Wiles

Swaine

2013

OAJSM

View full text Add to dashboard Cite

show abstract

“…Thirty per cent of the global population is believed to suffer from hypertension 2. It is also believed to be the cause of 7.1 million deaths per year, and hypertension is expected to have an increased prevalence of 60% by the year 2025 3. In South Africa, research has found that about six million South Africans have hypertension 4…”

Section: Discussionmentioning

confidence: 99%

Effect of short-term isometric handgrip training on blood pressure in middle-aged females

Mortimer

McKune

2011

CardioVascular Journal of Africa

View full text Add to dashboard Cite

ObjectiveTo determine the effect of isometric handgrip training on blood pressure (BP) in middle-aged women (47.88 ± 1.8 years).MethodsIsometric handgrip training was performed over five consecutive days. In each session, the treatment group (n = 9) performed four isometric contractions of 45 seconds each at 30% of their maximal grip strength. The control group (n = 9) sat for 15 minutes without exercising, for five consecutive days. Resting systolic (SBP) and diastolic blood pressure (DBP) were measured pre- and post-intervention. Data were analysed using a two-factor ANOVA (p ≤ 0.05).ResultsBlood pressure readings were reduced in both groups (SBP: p = 0.036; DBP: p = 0.0079), however there was no interaction effect for SBP or DBP.ConclusionsThe findings suggest that 15 minutes of sitting per day for five consecutive days is just as effective as isometric handgrip training for reducing BP levels. Future research is required to investigate the optimal isometric handgrip training stimulus required to reduce resting BP levels.

show abstract

“…2009). The potential mechanisms responsible for this post exercise reduction are unclear, but may include reduced vascular resistance and/or decreased cardiac sympathetic nervous system activity (Millar et al.…”

Section: Introductionmentioning

confidence: 99%

Acute cardiac functional and mechanical responses to isometric exercise in prehypertensive males

et al. 2017

View full text Add to dashboard Cite

Isometric exercise (IE) training has been shown to reduce resting arterial blood pressure (ABP) in hypertensive, prehypertensive, and normotensive populations. However, the acute hemodynamic response of the heart to such exercise remains unclear. We therefore performed a comprehensive assessment of cardiac structure, function, and mechanics at rest and immediately post a single IE session in 26 male (age 44.8 ± 8.4 years) prehypertensive participants. Conventional echocardiography recorded standard and tissue Doppler measures of left ventricular (LV) structure and function. Speckle tracking echocardiography was used to measure LV global longitudinal, circumferential, and radial strain and strain rate. From this data, apical and basal rotation and rotational velocities, LV twist, systolic twist velocity, untwist velocity, and torsion were determined. IE led to a significant post exercise reduction in systolic (132.6 ± 5.6 vs. 109.4 ± 19.6 mmHg, P < 0.001) and diastolic (77.6 ± 9.4 vs. 58.8 ± 17.2 mmHg, P < 0.001) blood pressure, with no significant change in heart rate (62 ± 9.4 vs. 63 ± 7.5b·min−1, P = 0.63). There were significant reductions in LV end systolic diameter (3.4 ± 0.2 vs. 3.09 ± 0.3 cm, P = 0.002), LV posterior wall thickness (0.99 ± 0.1 vs. 0.9 ± 0.1 cm, P = 0.013), relative wall thickness (0.4 ± 0.06 vs. 0.36 ± 0.05, P = 0.027) estimated filling pressure (E/E' ratio 6.08 ± 1.87 vs. 5.01 ± 0.82, P = 0.006) and proportion of participants with LV concentric remodeling (30.8% vs. 7.8%, P = 0.035), and significant increases in LV ejection fraction (60.8 ± 3 vs. 68.3 ± 4%, P < 0.001), fractional shortening (31.6 ± 4.5 vs. 39.9 ± 5%, P < 0.001), cardiac output (4.3 ± 0.7 vs. 6.1 ± 1L·min−1, P < 0.001), and stroke volume (74.6 ± 11 vs. 96.3 ± 13.5 ml, P < 0.001). In this setting, there were significant increases in global longitudinal strain (−17.8 ± 2.4 vs. −20 ± 1.8%, P = 0.002) and strain rate (−0.88 ± 0.1 vs. −1.03 ± 0.1%, P < 0.001), basal rotation (−5 ± 3.5 vs. −7.22 ± 3.3°, P = 0.047), basal systolic rotational velocity (−51 ± 21.9 vs. −79.3 ± 41.3°·s−1, P = 0.01), basal diastolic rotational velocity (48.7 ± 18.9 vs. 62.3 ± 21.4°·s−1, P = 0.042), LV twist (10.4 ± 5.8 vs. 13.8 ± 5°, P = 0.049), systolic twist velocity (69.6 ± 27.5 vs. 98.8 ± 35.8°·s−1, P = 0.006), and untwist velocity (−64.2 ± 23 vs. −92.8 ± 38°·s−1, P = 0.007). These results suggest that IE improves LV function and mechanics acutely. This may in turn be partly responsible for the observed reductions in ABP following IE training programs and may have important implications for clinical populations.

show abstract

Isometric handgrip exercise improves acute neurocardiac regulation

Cited by 53 publications

References 44 publications

Double-leg isometric exercise training in older men

Double-leg isometric exercise training in older men

Effect of short-term isometric handgrip training on blood pressure in middle-aged females

Acute cardiac functional and mechanical responses to isometric exercise in prehypertensive males

Contact Info

Product

Resources

About