Death By Dumbbell Thruster With a continuously running clock perform:
1 Dumbbell Thruster, in the first 1 min
2 Dumbbell Thrusters, in the second 1 min
3 Dumbbell Thrusters, in the third 1 min ...
Continuing this for as long as you are able.
22.5/15kg
Post number of rounds in comments.