Dizziness, blured vision and rapid heart beat while exercising. Heart beat during rest is 89-100bpm blood pressure 117/84. Is it normal?

Discuss w doc. One expects a physiologically appropriate increase in heart rate with exercise. This could be magnified if your volume state is low (intravascular dehydration) . Symptoms of dehydration coupled with the normal sympathetic stress of activity could explain this--but if you are still symptomatic after assuring adequate hydration you should see a cardiologist for monitoring/echo-stress study.