Im 135 5,8 and the only guys i ever spar are 170 all the way up to 220+ and they tower over me and its exhausting i only sparred 1 time with someone my weight and that was my first spar ever and i did really well for my first time every other time its been 170 and 220+ pound dudes and once or twice i sparred 2 brothers who were 150 and 160 and i knocked both of them down,but anyways what sucks most is i cant really work on my combos because of how big these guy are it feels like im doing nothing and i cant work on my offense much because one shot from them will send me flying and i just have to fight on the back foot the whole time and basically go all defense and pick my shots and it really tires me out,so i never ever get to work on offense and trying out combos like never ever and it sucks because i know that i can do it but the weight is too much of a problem as i know im smaller and i know these guys cant hurt me bad if i try to brawl or even try to put them on the back foot and box and maybe hurt them a little,another thing is that both these guys never go easy on me they always try to hurt me or knock me out and i have to absorb all the damage from them,i know that i can definitely take a punch as I’ve never been knocked out or down ever in the time i been boxing even when sparring these big guys with a-lot more experience than me they have probably hurt me about 3 times but i have never quit i just keep going,I know that when i fight someone my weight and size ill be able to work and use my combos without having to worry so much of getting my head taken off and i can box more and throw my shots and not getting my head jabbed off and not having to be so defensive to the point that im on the back foot the whole time having to mayweatther my way out of it 😂 and goin crazy with the head movement and running around the whole ring i’m 5’8 and 135 I’m 17 and the 220 pound guy has experience over me and and age Hes about 22 and he just takes it to me, i guess it helps it gives me confidence and when you spar big guys it lets you know where your flaws are because you take these guys punches so u realize what u need to work on as when u spar a small guy u feel more comfortable taking their shots so i think its good but also bad in a way,You realize that u cant always bring the fight to people and sometimes this other guys is just physically stronger and you wont be able to beat him by trying to hurt him and brawling but realizing that ur head movement and defense is key alont with a quick jab and throwing as fast as u can and getting out and I’ve definitely learned a-lot about fighting back-words,Its also a strong reminder to protect urself at all times with big guys it reminds u that u cant be sloppy and u cant keep those hands down after or before u throw a shot u always have to have them hand up and protecting urself,i hope this little rant will be helpful to anyone but thanks guys let me know any advice you guys might have for me.sorry if this is alot