According to Osho, yes—keep applying total, uncompromising effort even when the breath relaxes or seems to stop. What counts is complete intensity, not interim sensations or visible results. Ignore the mind’s excuses; the decisive shift often comes from the final, smallest push—the ‘last straw,’ the 100th degree. Let cessation happen by itself; your work is to give your all.
Keep going with full effort even if your breathing goes quiet; that tiny last push can open the lock.