I've been benching 140lb for about 4 weeks and it still hasn't gotten much easier. I was wondering if this is normal? I was only waiting 2-3 minutes between sets for about 3 weeks and heard I should wait 5 minutes between reps. I've been waiting 5 minutes between sets on all exercises for the past 2 weeks and it seems a lot easier overall and I haven't been as fatigued. I do 3 sets of 10 for all exercises or untill fail as long as I'm able to get the first set done at 10 reps.