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Discussion on Research Summary: Vertical forces on the horse's back in sitting and rising trot
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Moderator:
DrO
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Posted on Tuesday, Feb 16, 2010 - 8:04 am:
J Biomech. 2009 Nov 17.
Vertical forces on the horse's back in sitting and rising trot.
de Cocq P, Mariken Duncker A, Clayton HM, Bobbert MF, Muller M, van Leeuwen JL.
Experimental Zoology Group, Animal Sciences Group, Wageningen UR, P.O. Box 338, 6700 AH Wageningen, The Netherlands; Animal Husbandry and Animal Health, HAS Den Bosch, P.O. Box 90108, 5200MA 's-Hertogenbosch, The Netherlands.
In equestrian sports, it is generally assumed that rising and sitting trot load the horse's back differently. The objective of this study was to quantify the load on the horse's back in these riding techniques. Kinematic data of 13 riders were collected in rising and sitting trot. The time-history of the position of the rider's centre of mass (CoM) was calculated, and differentiated twice to obtain the acceleration of the CoM. The reaction force between the rider and the horse's back was calculated from the acceleration. Forces were divided by the body weight of the rider to obtain dimensionless forces. As expected, the computed average vertical force did not differ between riding techniques and was not significantly different from the body weight of the riders. At trot, two force peaks were present during one stride cycle. Both peaks in rising trot were significantly lower compared to sitting trot (peak 1: 2.54+/-0.30 versus 2.92+/-0.29; p<0.001; peak 2: 1.95+/-0.34 versus 3.03+/-0.32; p<0.001). This supports the general assumption that rising trot is less demanding for the horse than sitting trot.
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Member:
stek
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Posted on Tuesday, Feb 16, 2010 - 1:32 pm:
Dr. O didn't you post a study recently that had the opposite findings .. that rising trot wasn't any better? Maybe I am mis-remembering...
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Member:
stek
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Posted on Tuesday, Feb 16, 2010 - 1:34 pm:
Here it is:
https://www.horseadvice.com/horse/messages/7/342014.html
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Moderator:
DrO
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Posted on Tuesday, Feb 16, 2010 - 6:55 pm:
As a very reputable station says, "We report you decide."
Actually these two studies measured two different aspects of how you ride the trot. The earlier study looked at how you rode effected the way the horse went whereas this study actually measures the force on the back. Both can be true if the differences in pressure measured here are not significant to the horses back, head, and neck position as measured in the earlier study.
DrO
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New Member:
cometrdr
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Posted on Wednesday, Feb 17, 2010 - 6:39 pm:
Isn't a lot of this also dependant on how FORCEFUL the rising and falling is of the rider on the post. I have seen some riders that post so well you can hardly see it, as they are in such perfect rythm with their horses. then I have also observed others that flop on the backs so that you would think the concussion would injure the animal! I post all the time and my goal is to be that first type rider. but yea I agree - you report we decide! Thanks Dr O.
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