I'm 24 weeks, and am still doing a one mile walk about three days a week and swimming for 30 minutes about three days a week. Otherwise, I'm just doing some stretching every night. My MFM recommended that I stop pilates and weightlifting at 20 weeks, so I have, but I really miss it.
What do your routines look like mid-pregnancy? When did you have to slow down even more?
Re: How long were you able to keep up exercise and what were you doing?
I ran until 21 weeks - 25 miles a week until about 16 weeks, then about 12 a week until 21 weeks. It started to get really uncomfortable at the end. I had slight placenta previa, so had to be on pelvic rest anyway, so I stopped. I continued to walk 2.5 miles 3 times a week until I went on bed rest at 33 weeks.
I lifted until bed rest too, but I just didn't have time because I was working so much at that point. I did one upper body lift, one lower body, and one core exercise about once a week.
My doctors/nurses encouraged me to keep doing things until I felt uncomfortable. I think they trusted my judgement.
Boy/girl twins born at 37w1d and 37w2d
TTC #2 since July 2010
March 2012 IVF (MDL Protocol) Started stims 3/3; ER 3/11 (9R, 8M, 7F) ET 3/16 (5dt of 2 blasts graded 3AB and 3BA, 3 frosties(!!) Beta 3/26 = 386; Beta 3/28 = 827; u/s 4/11 says TWINS! Boy/Girl Twins delivered at 36 weeks 6 days