My legs get so tired in standard, that sometimes they become "soft" non-supportive. Is there any excercise that will help me with this problem? I use to be a competitve figure skater skating couple of hours everyday, so I do believe I have strength on my legs. My legs only get tired in standard, but not in latin. I only danced for an hour today, and after abour 40 minutes, my legs are so tired that I was barely able to complete my lesson. (we did tango, v waltz, waltz, and quickstep). My legs died after waltz which is about 40 mins after I started. I was wearing 1.5 inch staandard shoes, which is not that high either.