Hi and welcome to Sp! First of all I would suggest that you ask your question on the fitness and exercise board here: www.sparkpeople.com/myspark/messageboard_t
Then I would also suggest you can ask that question on a team. Becoming involved with a team that has like interests and/or goals is a good way to stay motivated and give and get encouragement and ask questions that others may know...Here are a couple suggestions but feel free to find your own...
Couch to 5K Group www.sparkpeople.com/myspark/groups_individ
30 Day Shred (An All About Jillian Michaels Team) www.sparkpeople.com/myspark/groups_individ