When I am at home during the day my resting pulse is about 62 Beats per minute, and my blood pressure is about 116/74. I ride the Elliptical about twice per week. In the evening at the health club I get on the elliptical trainer and my resting pulse is about 125. As I ride the elliptical my heart rate stays at about 125. This has been happening for about 5 weeks. Since this has been happening I cannot get a vigorous workout without feeling dizzy and light headed to the point that I feel like I am going to pass out. I have to stop for about a minute, and allow this dizziness, and lightheadedness to subside. I have not felt any chest pain at all. I live in Albuquerque , New Mexico, and the allergies are very bad right now. Maybe I have Asthma?