Recently i have stopped benching because I am looking to break my school record in the 100 m dash. I figured that benching just adds useless pounds to my chest so i switched to military pressing. I've been doing this for a while and i still wonder if this is a bad idea or not.
I dont get why military pressing would be any different to bench pressing as far as its usefulness or hinderence to sprinting. No, having a huge bench press is not going to help your sprinting, however you are likely not anywhere near that yet so do a bit of chest work along with everything else.
Things you can do in the gym to help your sprinting: Stretch!, espeacially your hip flexors Walking lunges, for mobility and to strengthen hamstrings and glutes Hip thrusts, about the only exercise where you go beyond 180 degrees of hip extension. A really good core program.
Remember that your track work is priority as far as your sprinting goes although generally being stronger will help. Doyle
Bench press is not what makes your chest big. It can be a tool for getting a bigger chest if you choose the right paramaters (volume, intensity, rest intervals, etc.) It can also be a tool for getting stronger. It can be a tool for building power in your upper body. Don't assume that it will automatically put monstrous amounts of size on, especially if all your training parameters on all your other lifts are geared towards improving your 100m dash.