By the time you finish all your studies you will probably be too old to be

By the time you finish all your studies you will probably be too old to be really good at sports like those, but if you spend enough time on (28) ___ while you are young, then one day you will find that you are very good at your sport but too old to study, and you will find it (29) ___ to get a good job. Somehow, it doesn't seem fair.