Make sure you know your limits for your age groups. If you are under the age of 40, you should try and stretch for about thirty seconds. If you are over the age of 40, then you should try and stretch for about 60 seconds to keep your flexibility. _Website not available. Sign in: https://www.twine.net/signup_…Make sure you know your limits for your age groups. If you are under the age of 40, you should try and stretch for about thirty seconds. If you are over the age of 40, then you should try and stretch for about 60 seconds to keep your flexibility. _Website not available. Sign in: https://www.twine.net/signup_WWWW…