You should feel the pressure of your weight on the heels of both feet through the ankles. A good golf swing begins with a re-creation of this state of balance at address. Standard instruction says to bend forward from the hips to get to the ball. I advocate the feel of your backside protruding rearward, not your hips bending forward. Once your spine angle is set, activate the knees, which is to say bend them slightly.
Most amateurs bend far too much at the knees.
As you bring your arms out in front of you to position the club, don't allow your shoulders to slouch forward. Keep your head in-line with the spine, with the chin up and off your chest. That's your CNS going into survival mode. When you lose your balance during your swing, the same phenomenon occurs, often causing you to 0pull up out of the shot. The reason why is because we lose our balance.