Fully focused, with correct breathing, with preliminary breathwork and trance meditation, put your entire focus and consciousness and awareness on your Sun chakra (you can then also spin it to activate it and cleans it if needed), breath in fully into your lower abdomen / Sun chakra, keep it inside for few seconds and vibrate Raum into your solar chakra while pushing the air out. Breath in as much as you can and breath out as far as you can, activating the muscles, slowly, gently but at the end force and activate the muscles as much as you can. You can also do this without raum. You can imagine the front extension as a vortex and breath in through that.
This require effort and focus, and giving time to actually be completely still, calm and aware before you start.
After you have repeated this as many times you needed it (you can start with only 3 if it's overwhelming), you can affirm something like "I'm now completely energised and remain energised throught the day. I always have energy to do whatever I want and need."
For regeneration, you can also take a 30 minute nap / deep trance session after work, or after / before this meditation, whatever works best for you. Just tell yourself you are going to wake up in 20-30 mins, to make sure you don't sleep too much.