I've been going to the gym for the past month and a half, working out with my dad. Since he used to work out a lot years ago, he's helping me by teaching my the correct forms for exercises, and preventing me from getting into bad habits while lifting. However, he just threw out his back last week, and I've been going to the gym alone ever since (probably will be going alone for a while until he;s better).
He always used to spot me, and for every exercise we did at least 3 sets, and on the last 2-3 reps of the last set, I'd struggle with the weight so much that I'd NEED a spot to get the reps/set done.
HOWEVER, since I've been going alone (no spotting partner), I really haven't been pushing myself as hard as when he was there with me. So to "make up" for those last "struggling" reps, I've been doing 4-5 sets of each exercise, and I always make sure that I can COMPLETE the set I'm doing. I might still struggle to do the last few reps, but I always keep the weight in check so that I can complete the sets myself.
Basically what I'm asking is, is this okay to be doing? I'll admit I work "harder" when my dad was with me, but do you think increasing my sets is a good trade off for not getting those "can't-do-anymore" kind of reps?