Swimming: How many lengths to start off with?

I used to do it all the time when I was younger, Im 17 now and Im thinking of swimming lengths for fitness, but its been so long im not sure I still can... Is swimming one of those things you can just jump back into after years and do it like it was...

I am a 24 year old male, about 5'7, 137 lbs. I exercise at least four or five days a week in some way, and I eat well. Yesterday, I took advantage of a benefit my company has, which is a natatorium (an indoor, 25-yard pool). After not having swum intensely...

I'm 13 and I'm about to go to an amateur swimming club, I can swim butterfly, backstroke, front crawl and breastroke. I can only swim 15 lengths before getting tired and I CAN'T DIVE!!!! I can tred water for 3 mins and can do a somersalt in water. I...

My general fitness is above average, but my upper body strength is below average, I'm not fat, actually I'm quite skinny but I can't seem to get swimming. I always start burning all my energy a length after I've left the wall. Its really annoying. I...

I am a 20 year old female currently weighing around 9 stone 8 (134 lbs) and want to just get fit, tone up, and maybe lose a few pounds. I have started swimming and currently swim at about x50 lengths of 25m (1250m) in 30min doing mainly front crawl/free...

I have never been an expecially confident swimmer, despite having lessons for most of my childhood. Having lost some weight (around 2 stones) and greatly improved my fitness since the start of the year I decided to give it another try. Sadly, I still...

I am a freshman and i like high school. i run cross country and track and I'm planning to do a lot of biking over the summer. i have decided that i would like to finish a (Iron Man?) triathlon. But swimming happens to be the missing link. i love the...

I play basketball and occasionally go on runs. I really want to start swimming and maybe go into competetive swimming. I'm not sure how to start because my town doesn't offer anything for beginning swimmers of my age. I just wanted to a find a fun club...

I want to start lane swimming, I'm kinda nervous because I've never done this before. I think I'm a pretty good swimmer, I'm doing bronze med but unfortunately I failed because I didn't get to finish all the fitness tests. I was thinking I'd be better...