I have 450L / 425R unders, am 16 days post op and my boobs still ache when I reach up to pick things. I tried to do some shopping and couldn’t lift the bags for more than a minute so no 10 days is not enough time to go back to heavy lifting at work.
You really shouldn’t do any lifting till 6-8 weeks. Don’t put your health at risk, you might displace the implant, cause CC or rip the muscle.
Take care, Annie