frankencrank wrote: ↑September 24th, 2021, 2:59 pm
Let me clarify one thing about what I mean by "balanced muscle" use. In the cyclist it is easy as the 4 muscle groups have pretty equal capabilities so they end up doing pretty equal work. But, if you are trying to balance muscles that have different capabilities (arm and legs) then balanced would mean working at the same percentage of their ability. So, they wouldn't be doing equal work but they would be working relatively the same. the percentage one would aim for would depend upon the type of race, sprint vs endurance.
Performance is always limited by the weakest link. I would like for them all to be used equally, according to their ability, so the weak link doesn't exist.
If you have a muscle imbalance, then as I understand it muscles can compensate for other weaker muscles. Weight training can help make weaker muscles stronger, so may help to balance out the load.
You, in the above example, are trying to make the the arms and legs pull to their full capability, with a push by the arms which will helps the the handle to be returned to the catch, it will have to be pushed, and the stored energy as you call it comes from the weight coming down to assist the drive.
So the only muscles being trained extra are, the arm muscles and maybe some secondary isometric benefit to the chest muscles on the way back to the catch with the device.
Then as you start the next drive phase, the weights drop thus assisting all drive muscles.
The muscles on the drive do no extra work, they are assisted. So you get your own drive force plus a bit of added force/assistance from the dropping weight, thus more watts equalling a further distance.
To me it looks like you are over thinking it. To summarise you will only give the drive muscle assistance not give them extra training or balance by having a weight drop to help them.
The only extra muscle training I can see with this device is in the triceps muscles, secondary the forearm and minor the bicep and some isometric from chest flexing, pushing away the handle back through the recovery. You also have to have a tight grip in order to return a bigger weight. Some possible pressure around the thumb joint maybe, as well.
I think the whole device will be like having a tailwind when on a bike, it will assist. it wont make extra muscle or train the leg muscles as I see it having watched you on the device for the erg.
If the aim is to find an assistance for rowing a rowing as an experiment then fair do I think you have succeeded.
But what is your ultimate intention for it?