The physical power that Adam was displaying was double that of what he should be able to display and his body was being pushed massively past its limits, but only with that much power, was able he able to keep up with the Goblin Lord for so long.
However, after fighting for almost 10 minutes where he had massively surpassed his limits and also been wounded and damaged by the attacks of the Giant Beast Goblin Lord, Adam's body was on the verge of collapsing.
The Goblin Lord was in a similar state and might even be more negatively affected than Adam due to its old age and unstable cultivation after being dormant for so many years.
Despite both of them being in such weakened and damaged states, they still continued attacking each other and their hits were becoming sloppy, while they also had to avoid all the debris that was falling on them.
{Snap out of it Adam} shouted Ava within his mind, worried for his safety.