Made it to the gym again this morning. Also went yesterday as well. I did alot of shoulders/upper body, and CORE! This is definitely making my pushups and situps much more challenging today. I normally make it a point to get on an elliptical machine for at least 15-20 minutes every time I go. Normally, when I run or do jump rope on a hard surface, It begins to really wear on my shins. It can start to feel like needles some times. Switching it up once in a while really helps!