I am 38 - 5.10 187lb 12-14 bf - w/o for 4 yrs regularly. I recently started a pre W/o after not using any for a month. Went In to the gym to do a Tri wo and had a great day of it. Great pump and focus. My question is - the muscles are sore to the touch 3 days later. I normally work them hard but this time I feel as I might have overworked them. Opinion? And is it a bad thing?