It is normal to feel muscle tension / soreness after a workout, in fact it (usually) means that you had a pretty good workout, at least effort wise - obviously though, with incorrect technique, albeit you might get muscle soreness you might create long-term issues.
An average muscle soreness usually lasts from 24 up to 72 hours, however just because it may last longer does not mean there's anything wrong with your body.
I'd also add the following (useful) tidbits:
- Muscle soreness is primarily caused by eccentric exercise (lengthening of the muscle). An iso-metric exercise is a good workout alternative during muscle-soreness which will cause a bit less muscle-soreness. This obviously does not mean, eccentric exercise should be replaced by isometric one. While it is a cliche, the "no pain, no gain" saying has a merit of truth to it.
- During extreme muscle soreness a good massage, sauna or even a hot bath/shower will always help!
- In general, your body is not used to having to putting out such effort (and it does not like it) - in fact, you may not known, but actually muscle growth is cuased by doing a (good sort of) damage to your muscles and tears, which the muscles have to re-grow. Over the course of time with a regular workout schedule, your body will get used to it and become more tolerant the muscle-soreness
- And a stable of any fittness advice, good nutrition and providing your body with enough rest (sleep) is always an absolute must!
Overall, don't fear too much. It'll be most likely pretty much gone in a day or two :)