Why Do People Do Sets Like This?

Bigger Stronger Leaner Beginners
1

I have seen people on some forums do exercises in 3x8,12,15.

Why do they do that instead of just 3x8 or 3x12?

2

Without seeing an actual example, I think it’s the same thing just abbreviated.

3

to get a variety of muscle stimulation

4

I think he is talking about pyramid schemes. You know, 1x12 than increase the weight and decrease the reps for every set after it. I do these, and I find it working for me. Its all what works for you.

Or, you can decrease the weight but increase the reps, but i have never liked this formula.