Did a 320 foot bounce dive off a sat bell in '09 and honestly the jump from 140 to 300 wasn't the hard part, the weeks in the chamber were. If you ever want to cross over, get your mixed gas ticket first and it'll feel like a normal job with more math.

Been there. I jumped from about 3k to 10k in a week and my shins were wrecked for two weeks. What worked for me was bumping up by maybe 1,000 steps a week and taking one rest day where I barely walked at all. Your knees and energy are telling you the ramp was too steep, so back off to like 6 or 7k for a bit and let your body catch up. Also check your shoes, mine were dead and that made the aches way worse. Once I slowed it down the sleep thing actually started working around week 5 or 6.

My buddy Dave did the exact same thing with a $300 espresso machine after a breakup. He pulled maybe 6 shots, then it became a $300 paperweight on his counter. Two years later he still has the little tamper sitting in a drawer like a trophy.