During all lifts, when lowering the weight go to the half point, return to full lift and lower the weight back to the start.
The first round of 6 reps is at full weight, the second round of 12 reps is half of that weight.
Concentrate on the lowering portion of all lifts.
Use the bag work at the end to cool down, minimum effort only. Do not forget to stretch your arms afterwards.
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