u/WillOk6461

So, I know the big trend is running in Zone 2. I know it's a bit overrated for people who are new to running or don't log major mileage, but I'm wondering if there's any hard limit on how much intensity your body can handle from any modality if your heart starts getting into that zone 4 or 5 area. The big thing with running seems to be injury risk, but is it important to avoid doing too many high heart-rate activities in a given week from a nervous system fatigue standpoint? or would daily Zone 4 or 5 be ok if you were either doing something low impact or cross-training (i.e. swimming/cycling every day).

I recently submitted a tape for a role on AA, but I saw that it was re-released with spec changes (that I still fit). Should I submit myself again or leave it?

I'm pretty new to sprinting, but I've noticed that when I'm cued by my coach to focus on a faster "ground contact time" with my foot that I tend to run faster, but I'm wondering if this in any way will reduce my power. Trying to "muscle" my strides like a jump seems to make me slower as opposed to simply focusing on hitting and leaving the ground as quickly as possible. I assume this is why people say to run "relaxed". My faster times come towards the end of the workout when I have less energy to "over-muscle" every step.

Are there any exceptions to this? Should my start have a more powerful and slow contact with the ground, or is it always better to prioritize leaving the ground quickly?

My BI has emailed all my references and seems to be speeding along as I'm also in backgrounds elsewhere. What's the soonest potential class I could be in provided I make the cut. Would it be May or June?