Here is the link to a blog I wrote about “getting your double bass chops” together.
http://www.drumsoloartist.com/live/blog/view/id_58/title_getting-your-double-bass-chops-together/You must GET YOUR PEDALS AND BASS DRUM HEADS ADJUSTED FOR YOUR BEST OVERALL SOUND AND FEEL. GET YOUR THRONE HEIGHT AND POSITION FOR THE BEST BALANCE. The speed and control is going to be coming from your feet and ankles not from your legs.
THE BEATER HAS TO BOUNCE OFF OF THE BASS DRUM HEAD QUICKLY IN ORDER TO GET READY FOR THE NEXT STROKE.
CHECK OUT TIM WATERSON’S SWIVEL TECHNIQUE clips on You Tube.
PRACTICE. PRACTICE. PRACTICE. THEN PRACTICE SOME MORE.
Many times, nothing of value comes to us easily. But if playing double bass drums was easy and everybody could do it, then it wouldn't be a big deal would it? Stay committed and have fun.