@chris1975 The worst factors of overusage injuries are training volume and frequency. Your volume is high and your frequency too. Adding variety will slightly change the impact on your tendons, considering that they need more time to recover than our muscles. For this reason, I'll lower the reps number and increase the weight/move to an harder progression that allows me to stay in a lower range of reps such as 5-8. This way you'll at least lower the training volume, and the increased intensity will still makes your workout effective.
Additionally, is important to note that your example is far better than doing the same workout 5-6 times.
First, because you are dividing your movements by plane, where A is frontal and B is sagital (for this reason, I'll switch Nordic to B and Bulgarian to A). Training this way will lead to slightly less stress for your joints since each plane is trained only by half compared to exercising the same plane each day. Your muscles are still being hit 5-6 times a week but they are being targeted in their different functions.
Second, this alternation between planes allows to hit more muscles. For examples, Pullups and Row both target lats, but both exercises also target different muscles such as Teres Major for the Pullups and Rhomboids, Rear delts and Traps for the Rows. As you can see you are incorporating muscles in your workout that could've left behind by training with the same routine over and over again.
In conclusion, alternate between A and B regardless you're concerned of overusage injuries. It's a far more complete approach.
