While the warmth from within Alex's body did nothing to stop the pressure outside itself, it did help him feel unbothered internally. His mind wasn't as clouded anymore and his body felt vigorous with energy.
The state Alex was in was a weird one. It was something he had always known he could use, but it only came up as a reaction to being under distress, so he could never test it out on his own.
He took a moment to understand his current situation. While he felt relief, nothing had actually changed on the outside. The weight was still there, the difficulty was the same.
It was only his mental and physical state that had changed which allowed him to continue this climb without feeling totally destroyed while doing so.