exercise bike sprint

hi i am looking for advise on exercise bike and the best method to burn fat.....i have recently been doing exercise at home.....using dvds like p90x and shaun t intense workouts...but my knees are begining to hurt and also getting bored jumping about lika a mad man lol......i was told that this method was really good to burn belly fat.....30 seconds full out /20 seconds off...on exercise bike.......is this good way to burn the fat of my belly and if so can you recommend a good exercise bike for £200,....cheers

Dougers1
 
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