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it's part marketing and part science The foam density is not in fact a weight but a measurement of mass per unit of volume and it is measured in kilograms per cubic meter (kg/m3) Basically, the higher the density of foam, the greater level of impact resistance. The impact resistance is the ability to push back against weight and prevent the foam from ...


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In my opinion to improve your jiu jitsu you need to train more jiu jitsu. I can se just a few cases in which I think that a parallel train could be indicated for beginners in order to drsticaly improve its game. If you are a sedentary person, overweight or underweight person. The train should be focused on strengthening, in order to avoid injuries. If ...


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