Get a grip?

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I just had a friend spend a weekend.  And, I was reminiscing about the Royal Canadian fitness program I employed to get my pre-teen self in shape.  (Oh, the friend was from Toronto- that’s why this came up.)  I also recalled using a handgrip exerciser as part of that regimen.

I actually still had it in my possession some two decades later. (I found it perusing one of my desks.)  Which I then used on and off for about a year, until it fell apart. Now, I find out that I should be using it again- all the time.

Drs. P. Miller, A. Levy, C. McGowan, N. McCartney, and M. McDonald from  McMaster University (yes, also from Toronto) published results of their study, Isometric handgrip training lowers blood pressure and increases heart rate complexity in medicated hypertensive patients,  in the Scandinavian Journal of Medicine and Science in Sports.  (No, I have no idea why Canadian researchers would publish in a Scandinavian journal.)

Hypertension is not just high blood pressure; it includes autonomic dysfunction.  Both of these conditions are considered amenable to exercise.  So Miller et. al. examined if the handgrip exerciser could be used to lower blood pressure.  Their test group included 23 folks over 60, with a mean age of 66.  All were under treatment for hypertension.  But, instead of the standard exerciser, the test subjects (13 of them) used a digital dynamometer, which would measure their grip level and strength.  The other ten subjects followed no special protocol. (They were the controls.)

Thrice a week for 8 weeks, the test group used the dynamometer at 30% of their maximum grip for 2 minutes [four contractions], relaxed for four minutes, and then continued the test protocol for another two minutes.  Twice a week, these sessions were effected at the university; the third session was performed at home.  (There was at least a day of rest between each of the sessions.)

And, the results?  The average systolic blood pressure (that’s the higher of the two blood pressure numbers) decreased from 125 mm Hg to 120- which is essentially normal- in the exercise group.  The control group?  It’s average systolic blood pressure increased slightly from 128 to 130.  Moreover, the mean arterial blood pressure [the blood pressure in the body that obtains between heartbeats] decreased from 90 to 87 for those who used the exerciser, while the other group barely increased (93 to 94).  The changes in diastolic pressure (the lower number recorded in your blood pressure measurements) were too small to notice.

It is thought that changes in the autonomic nervous system underwent minute changes in pathways.  These changes were what affected the heart rate, blood pressure, and blood vessel functions.  No, this was not aerobic exercise (like my swimming and biking regimens)- which has clearly been shown to lower blood pressure, but it may be a fantastic adjunct to any exercise regimen.

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18 thoughts on “Get a grip?”

  1. I wonder if that is the same idea behind stress balls – those squeezable balls that people can squeeze while stressed. My daughter uses one of those between games in volleyball. Maybe everyone should keep hand grip exercisers at their desk or next to the couch.

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