This topic seems to come up quite frequently. One of these days SDN will get a sports medicine subforum.
This is a modification of what I've previously posted about the topic
elsewhere:
1. Ortho: very competitive, need great scores. HAVE to like surgery. Residency is grueling but practice, depending on setting, can be very busy to cush-ish. Fast track to "head team physician" if that's your thing. Not as much training in non-operative MSK medicine compared to PM&R. Great pay all around.
2. PM&R: generally less competitive but getting a lot more competitive especially at the "top" places. Have to get over the fact that when you say you are PM&R/a physiatrist most people are like "huh"? (this can actually be a hang up for people). Otherwise have to like a lot of different areas: neuro, ortho, a little bit of medicine. If it's your thing, out all the other paths to sports med docdom PM&R is second to ortho in terms of procedures available (interventional spine, US injections, EMGs). AWESOME lifestyle. Actually great pay when you consider the hours/relative lack of stress involved.
3. FM: competitive to not competitive at all: can literally walk in to some of the lower tiered FM programs (but they may not have any sports/MSK faculty though). Great jumping off point for the medical care of the athlete since your backbone is the medical care of all ages and types. Much less neuro compared to PM&R and much less ortho compared to ortho/PM&R. But you will be THE medicine guru when it comes to athletes. Ok lifestyle depending on your practice mix. Pay is moderate.
4. IM: competitive to not competitive at all. Have a medicine backbone like FM but get MUCH less outpatient exposure these days in residency in most places. Plus as mentioned never really take care of kids which is a minus for a well rounded sports doc. Lifestyle can be what you make it. Pay can actually be pretty high if you take hospitalist type jobs on the side.
5. EM: competitive to moderately competitive...in general you have to actually be a decent candidate to match into any EM program. AWESOME at taking care of acute issues/injuries medical and MSK related, not so awesome at longitudinally taking care of patients (or at least not part of the core residency training at most places). Lifestyle and pay is what you make it depending on how many ER shifts you take on the side.