Key result
A 4-week isometric handgrip intervention using the novel IsoBall device significantly reduced systolic blood pressure compared to control (119.9 vs 131.0 mmHg; p=0.000).
Why the study?
Isometric exercise training reduces BP, but protocols are often limited by cost, immobility, and rigid exercise modalities.
Does a 4-week isometric handgrip training intervention using the IsoBall or Zona plus device reduce resting blood pressure in healthy participants?
RCT (n=23)
Randomly allocated
Does a 4-week isometric handgrip training intervention using the IsoBall or Zona plus device reduce resting blood pressure in healthy participants?
Absolute Event Rate: 119.9% vs 131%
p-value: p=0.000
A 4-week isometric handgrip training program using a novel IsoBall device significantly reduced resting systolic and diastolic blood pressure in healthy participants, comparable to an existing device.
Supports isometric handgrip training to lower BP in healthy adults; extends evidence to the novel IsoBall device.
Background: Hypertension is the leading risk factor for global mortality. Isometric resistance exercise training reduces blood pressure (BP). However, the protocols used are often limited by cost/immobility and the use of rigid exercise modalities. In response, a novel more versatile, isometric exercise (IE) device, the IsoBall (IB) was created. Purpose: The aim of this study was to test the BP-lowering effectiveness of this prototype. Methods: Twenty-three healthy participants (29.10±2.19 years old, 173.95±3.83 cm, 75.43±5.06 kg, SBP 127.10±10.37 mmHg, DBP 70.40±6.77 mmHg) were randomly allocated to either a control group (CON) or 2 isometric handgrip (IHG) training groups that used the Zona plus (ZON) and IB devices. The intervention groups completed 3 sessions each week of 4, 2 min IHG at 30% maximal voluntary contraction, with a 1-min rest, for 4 weeks. Resting BP, heart rate (HR) and IHG strength were measured in all groups at baseline and postintervention. Results: Postintervention systolic BP (SBP) was significantly lower in both ZON (114.5±8.2 mmHg, p = 0.000) and IB (119.9±7.0 mmHg, p = 0.000) compared to control (131.0±12.4 mmHg). Postintervention diastolic BP (DBP) was reduced in both intervention groups (ZON 66.6±7.4 mmHg, p = 0.004; IB 65.7±10.0 mmHg, p = 0.012) compared to CON (71.1±8.8 mmHg). Mean arterial pressure (MAP) was reduced in both groups (ZON 82.6±6.8 mmHg, p = 0.000; IB 84.3±9.1 mmHg, p = 0.000) compared to control (91.0±9.7 mmHg). No significant changes were seen in HR or strength ( p > 0.05). Conclusion: The results of this study indicate that both the ZON and IB devices elicit significant SBP, DBP and MAP reductions. Despite the ZON group having larger reductions in BP, no significant differences were found between the two devices. Thus, this study indicates the IB device to be an effective alternative to the ZON that can also be used to perform other IE modalities.
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Baddeley-White et al. (2019) conducted an RCT in Healthy participants (n=23). Isometric handgrip training (IsoBall or Zona plus) vs. Control was evaluated on Postintervention systolic blood pressure (SBP) (p=0.000). A 4-week isometric handgrip intervention using the novel IsoBall device significantly reduced systolic blood pressure compared to control (119.9 vs 131.0 mmHg; p=0.000).
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