I am using Isometric training in my Karate particularly for achieving leg split. I won't go into the details as to how its done here but my gosh, how I wish Ive learned it 30 years ago. I have been trying to do my split since 1983, almost 30 years and never managed to, and now , having just started, I think Im going to achieve a full split in less than 30 days! I will keep you all updated if that's an interest, Visit my facebook page (link below) and I will do my update there too.