
When the chair is reclining and the footrest is going up, the angle between the backrest and the seat does not change. This means it does not have total reclining ability.

When the chair is reclining and the footrest is going up, the backrest reclines back farther, opening the angle between the backrest and the seat. This means much more reclining ability, making these a good napping or sleeping chair.

The back and foot rest work independent of one another, allowing for a more complete control over the position you want to be in. That makes infinite position chairs perfect for extended recovery.