5 surprising causes of weak legs in seniors—and how to fix them! see the recipe in the first comment.

follow medical advice regarding vitamin D intake or supplementation.
Include dietary sources of vitamin D, such as fatty fish and fortified foods, when appropriate.
Discuss safe sunlight exposure and supplementation with a healthcare professional, especially if you have other medical conditions or take medications.

Correcting a confirmed deficiency may help support muscle and bone health, although results can vary depending on the underlying cause of weakness.

Peripheral Artery Disease (PAD)

Leg weakness, fatigue, or cramping during walking can sometimes be related to reduced blood flow caused by peripheral artery disease. Symptoms may be mistaken for arthritis, muscle fatigue, or normal