The level of observance varies. An Orthodox Jew, for instance, does not work or drive on the first two and the last two days of Passover, so he or she would not run a marathon on those days.What? This guy is Reform? And what branch of Reform recommends observing dietary rules during all of Pesach?
It's not an issue for Pesner, whose liberal Reform branch generally suggests followers hold a seder on just the first day of the holiday, though the dietary rules are observed the entire week.