So I started riding as of September of last year I ride fixed, when I started I was out of shape and was smoking not a lot like 3 or 4 cigarettes a day. On November I completely stopped smoking and felt the difference but now I feel like my speed, cadence and endurance has hit a plateau and I stock there, I usually ride 20 to 40 miles twice or 3 times a week either on 48x16 or 48x17, my average speed is 16 mph and lately also when I get on the drops I burn out fast .

I'm getting a little frustrated, does anyone have any drills to recommend ? I'm also thinking about getting some rollers to work on my pedaling.

Thanks