They teach rooting because the more yourare planted the more is braced for impact yes. This is not the same as saying the pinching action or force originates from the ground.
This is simply repeating the same data we have mentiontioned numerous times confirming the upper body as more significant a contribution than the legs.
"in the work of Khusyaynov (1983) it was established that the power characteristic of a strike is 39% dependent on the efforts of the leg muscles, 37% on the efforts of the muscles of the trunk, and 24% on the efforts of the muscles of the arm"
Or as they put it:
"1) repulsive extension of the leg;
2) rotational-translational movement of the body;
3) shock movement of the hand to the target."
There is no data I see showing the actual mechanics of the kinetic chain and it is definitely more complex than simply linear.
If a punch starts in the legs, how does one throw a punch on the ground?
Clearly syncing the entire kinetic chain is key but it does not change the fact that the punching action fundamentally starts at the arms and shoulder and it is about coordinating this movement with the torso and hip rotation and leg thrust.
I had provided a video even showing the significant contribution of the upper body in torso rotation mqtching the studies shown but still you try to deny it. They even highlighted muscles involved in a swinging action which is directly relevent to a punch.
Let me try one more to reason with u...
1. Why do u need to brace yourself against the ground? To be able to resist the equal and opposite forces that comes back under newtonian physics when u throw the punch? But how do u even generate the first force vector behind the punch in the first place? By pushing against the ground. Leg thrust is the single most important force contributor behind the punch because the leg is
thrusting against the floor.
2. Why do u quote khusaynov but fail to address the main point he is making and that I was highlighting? Which is that the lower body
starts the movement and leads the upper body ? It pulls the upper body forward in a whiplashing motion. Obviously this is only possible if the leg thrusts against the floor.
And hence the ground and legs - not the arms and shoulder- is the start of the kinetic chain. The lower body power is then chained with the rest of the body to result on the punch hitting through the target. You are unable to see this because u have not trained in a boxing gym before and have never been taught how to punch boxing style.
3. The link u tried to show is about the general movement of the body - not about power movements that require deployment of the kinetic chain to drive a high load and explosive athletic activity. That is why all the sports I raised like baseball, tennis and shot put all require the deployment of the lower body to power the rotation.
4 Let me suggest a modified version of the experiment I suggested earlier since u don't know how to punch boxing style. I am assuming that u know how to throw a baseball or softball properly...
Sit with your feet stretched out before you on a bench. Now using solely the shoulder and waist rotation but leading with the shoulder, throw a baseball as far as u can.
Then stand with your feet on the ground and wind up with your hips and legs like how a baseball pitcher knows how to do and throw the baseball as far as u can.
I am sure u will find that u can throw considerably further with the latter method than the former.
This is because of the power of the legs and lower body and having a proper kinetic chain tying in with human biomechanics and the ground connection.
5. In fact it is impossible to have a kinetic chain going i u start from the top from your shoulders and try to engage the lower body from the top. This is because the lower body is your base. It is in contact with the ground. U have to start the chain from the base otherwise what is happening is that u r not engaging the power of the lower body at all in your punch and u r not pushing off against the ground first.
But once u start with the lower body the kinetic chain cascades upwards through the core through the shoulders and blasts through the punch. It is a CHAIN That naturally connects smoothly upwards into the punch.
However if u start from the shoulder what is happening is that u r not even able to engage the waist as a meaningful part of the chain. Instead the shoulders can only engage with the arm. The wave cannot flow down from the shoulder to the waist and then upwards again into the arm and then into the fist because it si the shoulder that connects to the arm physically. The force is thus much weaker.
If u start with the waist alone without the lower body u can at least engage the shoulders and then the arm and the punch because the wave goes from the waist into the shoulder and then into the arm and then the fist But u cannot engage the lower body and ucannot push off against the ground and all u r doing is sitting on the ground - like the experiment of sitting on the park bench. Where u start the chain is the beginning of the chain.
Look, it is not going to be the end of the world if u realise that u r wrong about something. That happens to people all the time. The difference is that the rational thing to do is to accept it and learn from it and move on, not to uselessly argue against what is patently true.
