I'm in the same situation. I need to loose 7kgs before I join. I'm running every other day. Bought a set of weights so pumpin them every night. Obviusly eating well is essential.
Im overweight with a BMI of 94.7. Ive been training hard with bodyweight / circuit training as advised by the Royal Marines on: http://www.royal-marines.mod.uk/
What im unsure about is the fact that im getting stronger (heaves, push-ups, sit-ups, 1.5) but my weight hasnt changed.
Its been 2 months of training for me now and im getting stronger and faster every day. but my weight isnt dropping.
Im dont think im holding as much fat as before but i'd just like to know if anypne has experienced the same?