This thread is disgusting.
Discussing the weight of a teenage girl on a message board is terrible. If your contributing to this, you should be ashamed of yourself. The last thing that will propel Tuohy to success (which is apparently no longer on the table due to one non-PR season) is a hoard of disgruntled, slow, middle-aged men talking about her body, publicly.
Whether or not Tuohy has gained 5, 10, ... 20 pounds is irrelevant. Given the level she has reached as well as her academic ambition, its evident that Tuohy is an incredibly talented, smart girl with an amazing work ethic. I can 100% guarantee all of you morons that she is trying her absolute best in regards to nutrition, training, etc; AND that it is perfectly obvious to her that running is a weight-dependent sport. If she did gain weight, its not because she hit mcdonalds a few too many times. It's because its a necessary, normal part of her development, that is tremendously important to her health as well as her OLYMPIC aspirations.
Given the prevalence of REDS (Relative Energy Deficiency in Sport) in distance running (60% of college runners), its paramount Tuohy focuses on energy balance (calories in = calories out), not micromanaging her weight, to reach the top level. This may mean she puts on some weight over the next bit, maybe doesn't PR for a few years. BUT, what it will avoid is the fate that multiple college runners experience -- multiple sacral stress fractures, osteoporosis, and an inability to run high mileage after the age of 23.
BTW, most professional elite females went through a phase in high school or university of being softer. See Kim Conley, Shelby Houlihan, Shannon Rowbury, etc etc etc for reference if you'd like proof.
Note that this comes from a female who was very good, young (think 3:43 1500m equivalent for a guy), who experienced weight shaming from idiots like your selves, eventually leading to an eating disorder after some injury related weight gain. Comments from misinformed idiots who feel they have to "step in" and say "being light is really important, and your not right now" did nothing to help me. I eventually got back to that level and beyond focusing on consistent training and good, healthy and voluminous nutrition, not worrying about the number on the scale.
YES, i'm not denying weight is important. BUT it should not be the focus of Tuohy at this point given her talent. If you need proof, just look at the IOC resources on REDS and read stories from the likes of Bobby Clay and others.
Katelyn, if your reading this, don't listen to these idiots. There are more people rooting for you than looking to drag you through the mud at one mis-step. Trust your coaches, parents, and friends, not people who'd rather see you fail to remedy their own insecurity and shortcomings. You are once-in-a-generation and its important you have people looking out for you and your development!