It needs to be a weight you find really tough for your rep target. If 8-10 you shouldn’t be able to do 11-12 with that weight. If you can increase it til find right weight for 8-10 💪🏻
Just wondering how can I alter this training if i don't have right height box to lean on. Can I do it laying on the ground with different type of weight?
Is the box too high or too low? You can do flute bridges on the ground you just won’t get as much range of movement. If the box is too high I have a video I can send to help with this. You can also put a bumper plate under your bum so you’re sat higher against the box 😀