Firstly I'm not sure this is the right forum category, it's just I couldn't find one dedicated to sound design, but as I'm using Soundbooth I thought this category should be okay.
Anyway I've created a short visual effects film for a high school project and I'm currently in the process of designing sound for it. The film starts with a running sequence which is the part of the project I'm struggling with. I don't have the ability to record any sound so I'm having to use stock sound from online sources. In the video below I'm using two tracks for the audio, one for the sound of footsteps, the other for the fast breathing.
I've never done any kind of sound design before so it's all completely new to me, but I know that there is something wrong with the sequence at the moment. Due to my lack of experience I cannot figure out what's wrong with it. I'm thinking it may be due to the lack of variation in the sounds, but I'm not sure. I've found some reference for what I'd ideally want it to sound like, but even when comparing it to mine I can't figure out the problem. You can see the reference I'm using below.
I'd appreciate any help you can give me, because at the moment, the sound is by far the weakest part of my film.