I'm currently on the StrongLifts 5x5 program. I've set goals for myself to reach the "Intermediate" level based on the weights on this website by end of June next year, giving me a bit under 7 months from now.
Edit: For context, I currently weigh ~145lbs, 5'7". Have been training for about 4 months. First 2 months, started at a heavy deficit. Lost 7lbs fat. Gained 3lbs muscle. Next 2 months, ate a light deficit. Lost 5lbs fat. Gained 2lbs muscle. All beginner gains, I assume. Now at about maintenance, the past week. Can't say how much weight I've gained, or lost, since the weights have become difficult, since it's only really been the past couple weeks that I've been struggling to add weight every workout. So total body weight lost since starting training is ~8lbs. Just failed 5x5 on BP for first time on last workout. Judging by the difficulty, I expect I'll likely fail 5x5 on DL, Rows, OH Press within the next 2 or so workouts, Squats within the next 3 or so workouts.
(My goals are based on a 150lb weight, since by then I expect to have gained AT LEAST that much weight)
Goals
Bench: 185lbs ~1.2xBW
Deadlift: 285lbs ~1.9xBW
Squat: 240lbs ~1.6xBW
Rows: 160lbs ~1.05xBW
OH Press: 125lbs ~0.85xBW
Currently
Bench: 130lbs
Deadlift: 195lbs
Squat: 135lbs (I know my squats are pretty low right now)
Rows: 110lbs
OH Press: 85lbs
Main Question
At this point, I am starting to struggle adding 5lbs to each exercise for every workout, 10lbs for deadlifts. I've read a lot of articles online about the controversy behind using a belt for squats/oh press/deadlifts. When to start using one, or to ever use one. There are lots of people who say you should only start using a belt when you get to like 280+lbs squats, 300+lbs deadlifts, etc. Obviously, that's past my currently set goal. Medhi states that "once it becomes harder to add weight every workout, start wearing a belt," but plenty of people online seem to disagree.
Since I've started to really struggle adding 5lbs every workout, is it worth using a belt at this point, particularly for squats because I know 135lbs is pretty low to use a belt for, even though I'm struggling to add weight every time. And at what weights did you guys, if any of you, start using a belt for your lifts?