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I was wondering i anyone has done the HIIT program and if it really works? Is it for mass or cutting?

I'm a hard gainer and I'm trying out this H.I.T. program I found online and before I started it wanted to check here to see if theres anything I should add or remove looks like this: Day 1 Incline Bench Press 3 x 10, 8, 6 Flat Fly's 1 x 8 Shoulder Press 2 x 8, 6 Side Raises 1 x 8 Tricep...