mls2008 - Are you sure that you joined a Greek organization and not the army?
I can understand a need for what you may call non-harmful hazing for certain organizations (sports teams, military, etc.) because they serve the organizational standards of having a physically strong body but to my limited knowledge, most recognized Greek organizations prefer to focus on values outside of a member's physical ability.
Whereas most collegiate Greek organizations focus on values such as strong mind and service to community, why do you feel the need to test a new members brawn? Large biceps and running laps do nothing to further the organization's goals where study hours, philanthropic participation and perhaps new member quizzes better help to reach the organizations ideals.
Instead of requiring physical tasks and yelling at new members to "prove their worth", why couldn't your members prove their worthiness by donating # hours to a philanthropy or by achieving a pledgeclass GPA greater than 3.5/4.0?