depends. the information you’d be able to get from labs would be applicable to future cycles, not the current one. There just wouldn’t be enough time to change anything. What I would do is get bloodwork at the end of the cycle, to see what it looks like at its worst. You can use that information to plan your next cycle.
It would also make sense to get labs again 4-5 weeks post cycle to see if/ how fast you’ve recovered (if any values are out of range). If your blood test at the end of the cycle looks really good, I don’t see a reason to get the second test, but if you seem some things that are concerning you, the second test would make sense.
But, all that being said…
that’s not a blast. I think you’re using terminology wrong.
Blast and cruise refer to always being on some level of testosterone, and just changing the dose. So you basically cruise at around TRT levels (some people prefer higher), and then the blast is when you add in other compounds, raise test levels, etc.
Are you on TRT? If not, then there is no such thing as a blast. It’s just a cycle, and then you come off completely. When you use the term blast, people assume that you’re always on. I’m assuming that’s not the case, since you’re calling 250-300 a blast. A more typical blast/cruise protocol would be, say… 750-1000 test on a blast, and then cruising anywhere from 150-400.