by Sasha Marvin on Tue Mar 03, 2009 5:58 am
Being honest I prefer the alternate vibration such Galileo, Maxuvibe and Globus PW series. (from 5000 to 12000 USD) You can train at higher G force and muscle contraction comes close to 4 5 G while on vertical uniform plates you get the same at upper values such 8 to 10G.
If I have to chose a less expensive device my option is for the XG DKN series. One engine but enough performance to stay in the muscle tune operational range without entering the discomfort zone. And reliable. (from 2999 to 3999 USD)
For the joints, I didn't like too much the air joints, and metal springs result in a weird behaviour. Rubber dense joints looks to be the more stable. Air joints absorb less power on the vertical plane but there is no a definitive answer to your question, too many factors, one or two engines, the mass of the platform... and of the eccentrics on the flywheels are all factors that play a role in the final vibration.
I took a look at the Pulse Trainer searching the web but there is a lack of specification to understand the real performance of the machine.
I need to know the acceleration or G force at the main frequencies: 20 30 40 50 Hz and the real plate displacement (magnitude) with a load of 200lbs or 90kg.
I have to analyze the single amplitude waveform shape, also, for it has a relation with the miotactic reflex and muscle contraction.
Without the above information I can't have an idea of the performance of the platform.
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Sasha MarvinVibration Training Device Admin