Strength training protects against high blood pressure

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    Strength training protects against high blood pressure

    Strength training protects against high blood pressure

    Strength training protects against high blood pressure If you have high blood pressure, many doctors and patients think you shouldn't be doing strength training. This is not the case, write researchers at the Catholic University of Brasilia in the Journal of Strength and Conditioning Research. The researchers say strength training actually has a positive effect on people with high blood pressure.

    Exercise & blood pressure
    Exercise can help prevent high blood pressure, and people who already have high blood pressure can reduce it a little by starting to do more exercise. [Clinics (Sao Paulo). 2010 Mar; 65(3): 317-25.] The indications that endurance exercise – for example, 40 minutes of cycling at an intensity of 60 percent VO2max – helps reduce blood pressure are strong.

    Less is known about the effects of strength training on blood pressure, although we do know that, during sets with heavy weights, blood pressure can shoot up. For people with vulnerable blood vessels, the temporary peak in blood pressure may be too much, although there are studies that suggest that good breathing technique and the use of blood-pressure lowering medicines such as propranolol can help flatten off the peak ScientificWorldJournal. 2012; 2012:913271.].

    We also know that blood pressure declines a little in the first hour after a strength-training session, in people with normal blood pressure and in those with raised blood pressure. [J Strength Cond Res. 2001 May; 15(2): 210-6.] This would suggest that strength training might have a positive effect on blood pressure.

    The researchers wanted to know what the effect of strength training would be on women with high blood pressure who were taking medication for this. Would strength training have a positive effect? Or would the women be better off doing moderately intensive forms of exercise?

    Study
    To answer this question the researchers got 32 women aged between 60 and 75, all of whom had high blood pressure, to do strength training three times a week for four months [EG].

    The women trained the main muscle groups each session, doing ten simple basic exercises: lat-pulldowns, leg-extensions, chest presses, hip abductions, leg curls, leg presses and calf raises. The women performed three sets of each exercise. They started off at 60 percent of the weight with which they could just manage 1 rep, and built this up gradually to 80 percent.

    Results
    When the women were not taking medication against high blood pressure, their systolic pressure [pressure during the heart beat] was above 140 mmHg and their diastolic pressure [the pressure between two heart beats] was above 90 mmHg.

    The first table below shows that the resting systolic blood pressure in the experimental group decreased by 14.3 mmHg. This was a statistically significant effect. The second table shows that the diastolic resting blood pressure went down by 3.6 mmHg. The effect was not quite significant.

    So women with high blood pressure that is under control can happily do strength training the researchers conclude. They must be sure to gradually increase the weight they work with. Careful strength training can even help to keep blood pressure under control and may even help lower it.

    "Chronic reduction of resting blood pressure observed in this study may be translated as a significant protective effect on the volunteers cardiovascular system", the Brazilians write.

    Source: J Strength Cond Res. 2013 Dec;27(12):3475-80.

    A control group did no training at all [CG].
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