Being this is my first week of riding I was excited to try 12 miles (3 - 4 mile loops). I did it in 47 minutes and pulled my 25 pound son in his baby trailer, oh and it was 100 degrees too. I notice my hands went numb, my legs didn't really hurt but the rest of my body was exhausted. My butt, hands, back and arms are hurting my legs aren't tired at all. I am going to shoot for 20 miles in the next 30 days. What is a training schedule to do it?