CAPT OF A B757 OVERSHOT CLB ALT WHEN HE TRIED TO SLOW ACFT IN THE CLB DUE TO TURB; BY ONLY PITCHING UP THE ACFT NOSE. HE IMMEDIATELY THROTTLED BACK AND PITCHED OVER TO RETURN TO ASSIGNED ALT.

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CLB OUT; ASSIGNED ALT FL230. AS WE PASSED FL210 (AS I RECALL) WE ENCOUNTERED MODERATE TURB. SINCE WE HAD JUST LANDED AND HAD NOT EXPERIENCED IT THEN; I THOUGHT IT MIGHT JUST BE A SMALL AREA AND DECIDED TO SLOW TO ROUGH AIRSPD AND AT THE SAME TIME CLB THROUGH IT. I DID SO BY PULLING BACK ON THE YOKE. A PHENOMENAL RATE OF CLB RESULTED (IT WAS A LIGHTLY LOADED B757). AT FL225 I SAW THE RATE OF CLB WAS VERY HIGH AND PULLED THE THROTTLES ALL THE WAY TO IDLE AND EASED OVER ON THE CTL COLUMN. I SHOULD HAVE MOVED THE CTL COLUMN MORE AGGRESSIVELY; BUT WITH THE THROTTLES OFF; I DIDN'T THINK IT WOULD BE A PROB. WE JUST ROCKETED THROUGH FL230. I SHOVED THE NOSE FORWARD AND FINALLY STOPPED THE CLB AT FL235; AND DSNDED IMMEDIATELY TO FL230. NO COMMENT WAS RECEIVED FROM CTR. CONTRIBUTING FACTORS: MY SCAN WAS SLOWER DUE TO AN ONCOMING COLD. I DID GET OFF THE TRIP THE NEXT DAY DUE TO THAT. AS SOON AS WE ENCOUNTERED THE TURB; THE FO NOTIFIED THE CTLR AND OF COURSE WAS GIVEN A FREQ CHANGE. HIS HEAD WAS DOWN; CHANGING FREQS; JUST AT THE MOMENT THIS ALL HAPPENED. ALSO MY THOUGHTS WERE DIVERTED FOR A MOMENT TO THINKING OF THE FLT ATTENDANTS; WHO I KNEW WERE UP. IN RETROSPECT; HAVING BEEN AWARE THAT THE ONCOMING COLD WAS AFFECTING ME; I SHOULD HAVE USED THE AUTOPLT RIGHT AWAY. IN THE EARLY STAGES OF THAT ILLNESS I DON'T FEEL SICK ENOUGH TO NOT TAKE A TRIP; JUST A LITTLE; WELL -- BLAH. IT DOES TAKE THE EDGE OFF ONE'S PERFORMANCE.