I think enough has been said about fear by zzz as reply to your previous post ... my take on things was and is still the same ... YOU decide how hard you want to push yourself ... and indirectly, how far you want to go in it, how long you want to keep climbing ... Anyone else can only give you advice and the gentle push that you might need occasionally ...
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and just for everyone's referance ... a little definition (not perfect, but I hope it answers some questions)
An ARC is a climbing specific endurance workout. Arcing consist of 20 - 40 minutes continuous climbing at an intensity level just below that at which you get a pump. The goal is to increase the amount and intensity of work that your forearm muscles can do using the aerobic energy system. This is essential to on-sight climbing and longer red points as well as generally moving up the grades.
ARC stands for Aerobic Restoration and Capiliarity a term Dale and Udo introduced to the English speaking world in Performance Rock Climbing. In their description of ARCing they emphasize the idea that climbing specific endurance training builds capiliary infrastructure in the muscles of the forearms.
Many people think endurance only helps with recovery or resting on holds. This is incorrect. Having a high level of climbing specific endurance increases the intensity and duration of work that you can do before a pump sets in AND it increases the speed with which you can recover from that pump. Many European climbers do very well in comps and on-sight such challenging routes outside, because they rely heavily upon having a high anaerobic threshold in their forearms. AKA climbing specific endurance.
