Ah yeah totally understandable that he would have a higher weighting than the others. 

Also, just a thought, but maybe for the training as a whole we could have a time skip of like a week or so for the genin to get their bodies used to the added weight, as would be done in most training sessions of anime or manga. Mostly because, while the weight training is important, trying to do anything substantial before the body has adjusted to the change would kind of be reckless and cause much more pain and damage than necessary even with heightened healing abilities. 

So you know, just learning to walk and move normally would be a good way to begin XD