The pain feels more like my bones than muscle and I have been doing weight training for lower back. Being 19 years old and having done plenty of running in previously years. The pain really doesnt feel like the good muscle pain and it doesnt come about when i run on my heels first. Also no pain afterwards or soreness in morning which makes me further think its not something that would go away but again i really dont know. As far as the times are concerned my heart rate is comfortable with the 30 sec slow and fast just the pain in back is problem
