LogFAQs > #968879450

Not with lightheadedness. In fact, being lightheaded usually means blood is not pumping enough oxygen when its from exercise, which means your heart will try beating faster, which could lead to increased risk of a heart attack.

With enough time and with guidance from your PT, your heart will get stronger and youll eventually be able to do more before that feeling occurs, but I would certainly not press it given that youve had a fairly recent heart attack.

Even heart issues aside, unless youre hardcore training for a competitive long distance race or such, I would avoid pushing through lightheadedness. Pro runners do it because that feeling is something you have to get used to, but unless you are in that sort of situation and extremely in tune with your body, theres no need. At that point theres no health benefits; competitive racers only do it because they sacrifice some health benefits for their competitiveness.