...The hours of academic work per week figures in this study seem VERY high, and I have no reason to think athletes in major D1 sports are any more studious than other college kids on average.). I wonder if the study and athletics hours reported are a little high? Those with children playing sports in college please chime in.
Second, it's scary to see D1 baseball players saying they miss an average of over 2 classes per week in season. A full academic load would typically be 5 or 6 semester classes, each of which meets twice per week (maybe three times for some courses). If we assume 12 classes per week, players are missing close to 20% of their classes. VERY few of my students who miss one in five class sessions earn good grades.
Also interesting that such a high percentage think they have a chance to go pro. That optimism is good in that it supports the drive to improve, but it's sort of like believing 90% of people are above average.
Chico, some comments on your observations...
I think the academic work figures include classes, labs and study time. Full time college student is roughly five courses. So, maybe add in a lab and it's pretty typical, I think, to have around 20 hrs of class/lab/project/field work time plus study time. So 35ish is about right.
Missing 2 classes per week in season - keep in mind that they know in advance they will be missing these classes so the necessary arrangements can be made to get any work assignments, lecture notes, etc. Student-athletes have the extra incentive to meet required GPA to stay eligible so most make sure they take care of business.
High percentage think they have a chance to go pro - This can be a tricky one. It takes a high level of confidence, among other things, to compete successfully at the college level. So, if you are confident you can contribute at this level, you are likely to think you can contribute at the next level, even though the odds say you won't.
You mentioned in a previous post "Are pre-meds and engineers at MIT, Johns Hopkins, etc. putting in these hours for sports? (At such schools, I can't imagine coaches are discouraging players from picking demanding majors (?))" If your son is looking at one of these majors, be aware that this is a huge factor to weigh. It is somewhere between difficult and impossible to play college baseball while taking these majors at most schools. There are opportunities out there but they are much more difficult to identify and sometimes the quality of baseball suffers significantly. See Cal Tech, although things are looking better recently.