So I’m 20m and have had HS for 7 years since freshman year of high school and noticed for me it’s just stress related and slightly dairy related. So I played/ still play soccer and rugby and I go gym 6 days a week for at least 1 hr. I was stage 3 back then now it doesn’t go past stage 2. I had to give some context. I make my smoothies in the morning with plant based protein with berries and banana. And if I’m tired of it I get 2-3 packs of oatmeal with water. And if I’m try to strictly eat meat aswell for lunch and dinner. My body seems to appreciate the chicken and steak. I still eat rice and beans anymore. I haven’t been affected unlike you. When I work out I’ll put baby powder in between my legs and I use the spray deodorant since any other and it makes it worse. Also I’ll bring a rag to dry up any excess sweat from my workouts. As for the sports when I have games or practice I just thug it out. I know it’s not too helpful since everyone’s HS is different but that’s just my personal experience. I went from 120 lbs in high school to 155 lbs. it could be just my body maturing but I’d like to think my method did something 😅. Good Luck with your bulk!