When you rely on your hands too much, you don’t appropriately use big muscles like abdominals and back muscles. In that case, usually your first to the fourth dorsal vertebra bulges in a small arc.
When you especially use your wrist, tuning the second dorsal vertebrae will work. The second vertebrae is deeply related to the reproductive system. So if you flip this connection, you will notice that when you have some trouble in the reproductive system, at the very least you need to tune the second vertebrae and your wrist.
And when you use your elbow for some reason, tuning the third vertebrae will work. The third vertebrae is deeply related to the respiratory system. As the same thought works here too. When you have some trouble on the respiratory system, at the very least you need to tune the third vertebrae and your elbow.
And also if you put your hands up and down quite often, you need to tune the first lumbar. In other words, tuning the first lumbar makes putting your hands up and down more smooth.
The most important thing is, when you rely on your hands too much, you usually think too much. When we think too much, we have a tendency to use visible parts in our body rather than invisible parts like abdominal muscles.