Originally Posted by
Labze
Neither of the too approaches are at all effective. Your structuring of workouts are simply horrible, sorry to say. In fact, you are having way too much off time, way to little frequency.
There is absolutely zero reason to have a day only for arms, you should switch to a fullbody each second day or go for a 2 split that you run either 4 or 6 times a week depending on how you feel about it. Muscle protein synthesis is only elevated to about 36 hours after working out that specific muscle, which means that any time that your not training that muscle again is practically wasted time. Both hypertrophy and strength stands to gain from high frequency workouts.
My approach which has been very effective over the last year, and scientifically backed, is doing fullbody 6 times a week when bulking and doing a upper / lower body split when cutting. I perhaps wouldn't recommend fullbody if your not used to high frequency, but a upper / lower body split is highly effective for anybody.