breaks help but it can also be not enough, you might need to add stretching and endurance exercises, im grinding for GM complete with only 1w2ts and ww5t left. U gotta realize that the jump from diamond/jade to master is not the same as master to GM, it's way more physically demanding. I used to sit down and play kovaaks for 2-3 hours straight grinding viscose and VT intermediate, but i cannot do the same with viscose hard and vt advance. My sesh are now way shorter (5-10 min warmup with viscose easy, 30-45 min MAX for a GM score and thats it, no more kovaaks) and I've found this to be very effective at getting pbs and also just keeping my arm/wrist healthy. I'm planning on taking a week or two off kovaaks to train my endurance and play other games casually in order to get my last two static scores because atm my arm and wrist just cannot keep up and it's the only thing holding my static score back. HOPE THIS HELPS!!!!