Final answer:
Antithrombotic stockings should be applied before the client arises in the morning when the legs are least swollen, to ensure maximum effectiveness and reduce clot formation.
Step-by-step explanation:
Antithrombotic stockings, also known as compression stockings, are designed to help improve circulation and prevent the formation of blood clots, such as deep vein thrombosis (DVT), especially in individuals with peripheral vascular disease. The proper time for these stockings to be applied is before the client arises in the morning when the legs are least swollen and without gravitational influence from standing. Applying the stockings at this time ensures optimal effectiveness, promoting venous return and reducing the risk of blood clot formation.