I would like to know how should i plan my routine?

i would like to change my routine every 4-6 week depending if i have reached my goal

i love to do 6 rep for myofibrillar hypertrophy and 15 rep for Sarcoplasmic hypertrophy 

i have tried TUT for past 6 week and yesterday i did chest for 20sets: 3 set flat and incline BP 6rep, 3set flat and incline BP 15rep, other 8 set were isolation exercise at 8 rep range. Today my chest were so sore so i wonder if this routine is good or not

Mate if your chest is sore!! thats all you need to know ;-)

- 4-6 weeks is too soon to change a routine. Your body needs to adapt to a specific routine, and that usually happens months after you start doing the routine. You should stop using a routine when your body doesnt make any more gains while using it. If you stop making gains with a routine in 4 weeks, it probably means its a bad routine or you have messed up some other parameter like progressive overload or nutrition etc etc.

- You cant train for myofibrillar or sarcoplasmic hypertrophy. The truth is, the ratio of myo/sarco hypetrophy is genetically determined and we cant do anything to influence that. The ratio is different for different people but you can change a specific person's ratio. That concept is outdated and no longer vaild. Just train in different rep ranges and you will gain hypetrophy no matter what. It is known that you will gain more strength doing low reps and you will gain more strength endurance doing high reps but they both lead to similar hypetrophy results.

- Soreness is not always a good thing. DOMS is normal when you do a routine for the first time, or if you change a parameter and your body hasnt yet adapted to it. Other than that, you cant judge a routine by the DOMS it creates the next day. DOMS or not, muscles will get repaired within 24/48 hours after your workout. If you have DOMS for more than 2 days it means you overdid it in the gym. Probably too much volume ( too many reps and sets). You are 16 years old, so you cant be advanced in weight-lifting ( correct me if i m wrong). So, 20 sets in my opinion is way too much volume for you, and probably not enough frequency. I would only do 10 sets if I were you, and I would do the workout 2 or 3 times a week for optimal frequency. If anything, DOMS is inflammation of the tissue which is not a good thing as you can understand. You can get huge without ever getting sore and you can always get extremely sore but never grow out of it.

Kostas

Like Kostas says you need to give your body time to get into a new routine...change it like you want to and you risk making gains. At 16 and possibly still a beginer (correct me if that's wrong) you will make good gains on your routine. If your not making good gains check your diet out and maybe your form. I aim for 3 sets 8-10 reps per exercise and make good gains....i then up the weights when I can knock out 10 reps easily with good form. I may alter tempo etc for variation too.

I'm 17 now,working out for 1year 5month. I feel that my body work well in high vol. What is the benefit of 8-10rep range? I feel that it is too high for strength gain or too low for endurance. I'm also not sure when is my body is adapt to the workout

I agree DOMS (soreness) doesn't mean you had a great workout it's just inflamation. 8-10 reps are a good range to hit for your fast twitch muscle fibers which have the most potential for growth in strength and size. In the 1st year or 2 they say newbies and I mean no disrespect by that can make some quick and big gains and I agree you may not platuea for months so stick with a routine for as long as you can until you don't feel you are getting any results like size difference or strength gains but after that I'd switch routines up every 4-8 weeks imo. Some say muscles adapt fast and can fully adapt at 3 weeks. Progressive overload is key, try to add 3-4% every week. I personally prefer to switch up at least reps or routines and reps every 4-6 weeks.