The organs associated with the late summer season are the spleen/stomach pair; both of which are associated with our ability to digest food and use it for the health of our physical bodies. Poses that are good to do to stimulate these meridians are Dragon pose or low lunge for the stomach meridian and Dragonfly for the spleen. In Dragonfly pose, we sit with the legs spread as far apart as is comfortable and fold forward keeping the spine relaxed.
The season is also a good time to go barefoot outside and try to connect and absorb the energy from the earth. Perhaps also consider incorporating a walking meditation into your day; focusing on the earth beneath you while you walk and repeating a mantra as you go. Meditation and mild exercise are two other great ways to stimulate the relaxation response.