The method involves crafting a full set of Fortify Block enchantments, with the maximum of 40% on each of your shield, hands, finger and neck slots, and using the Aetherial Crown method mentioned above (by the Standing Stones table) to receive all three experience boosts possible.
There are a few interesting ways to level it up rapidly:
Watch on YouTube The fastest way to max level Block, Light Armor, and Heavy ArmorĪlthough often ignored, the Block skill tree can be surprisingly useful, particularly with the level 100 Perk, Shield Charge, which lets you knock down most enemies by sprinting at them with your shield raised.