Should i do this tomorrow?

I'm in ROTC, well i'm contracted but it's the summer before my freshman year. so i've been doing optional PT with the other cadets. Usually only a handful show up. Wednesday the 2 cadets i ran with were both guys, well over six foot, and i'm a 5'7 girl who's 4 years younger than them. so they had longer and stronger legs than me. after i chased them 2 miles up a hill and sat on the sidewalk puking they informed me they were both on the college track team. wtf?! anyways, no surprise my legs are killing me today (this happened yesterday) but there's another training session tomorrow. Should I go if my legs still are sore? i'm the only incoming freshman who's doing this optional pt with them, and one of the few cadets over all, even though it's strongly encouraged, so i don't think i'll look like a wuss if i don't show up tomorrow morning (friday). but i still don't want to just slack.