Damage Penalties

Currently in Minecraft, you can run around at 1 hp, and run away from even some of the strongest threats. I suggest that taking damage will inflict movement penalties on players.

One idea for this is that taking damage will break the players sprint. It is very over powered that anyone can flee from an attacker while still being heavily damaged. When hit, your sprinting should stop, but you can continue sprinting afterwards, the penalty just causing the player to be swiftly hindered.

Another suggestion is at and below 10 hp (5 hearts) you will be inflicted with a -15% speed reduction, the same as a slowness potion. Similarly, when you have reached 4 hp (2 hearts) you are given -40% speed, but are unable to sprint. 

This will give more incentive to avoid damage, and more skilled/better geared players will be able to finish off their ill equipped prey without a lengthy, and eventually pointless, chase.