As Long As (To That Extent)

3 related grammar points that express the same core idea - compared below so you can tell which one to reach for.

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～以上 JLPT N2
～限り JLPT N2
Verbる / Noun(である) + 限り(は) JLPT N1

以上 / 限り

A condition that holds for now and may stop holding.

～限り vs ～以上: Use 限り: 体力が続く限り. It tracks a condition while it lasts. 以上 takes a fact as settled and draws a consequent obligation from it ('given that you have accepted, you must'), which is closer to からには than to a running condition.