If you're that sore you over did it. My son is a degreed Personal Trainer and he has trained hundreds of people to attain physical fitness. Start lite and work up. For sore muscles, rest and a little aspirin is all he advises. Muscles that are sore are injured and have to recouperate. Always do warm up exercises before you start your serious workout. Even though you are sore, if you slowly stretch those sore muscles until they are warm, the pain will cease in a few minutes. I have problems with my knees and I use a heat pad for a few minutes before I go walking and it helps. Monty