I made a Weakaura to help mana users track your MP5 ticks. With this I have a box positioned on my mana pol and when the box encapsulates the numbers on the right hand side of my mana pool I use [Water] or [Food] and I can tick eat while running at full speed.
This is very useful in PvP but also has some PvE uses as well.
First Gif is me running normally with regeneration starting @ 50%
https://gyazo.com/b9358b0a7f995e39d815230bdeebb3ff
Second Gif is me tick eat running using the weakaura to assist me when I should eat.
https://gyazo.com/eea292bec717975bf7cc893d7a78da03