Building strength after losing weight
A common discussion topic is "should I lose weight first and then build muscle, or the other way around, or can I do them both at the same time?". Ok, so I had made my decision; I lost weight first, I can be done in 1-2 months. I did do some training, but not much, and I lost a bit of muscle. I don't really care about it, I've got plenty of muscle, my body likes to make it.
Anyways; how can I start building strength and muscle after I have arrived at my target weight effectively, and without gaining significant amounts of fat? I do triathlons, so I am mainly interested in building the sort of strength/muscles that help me achieve better times. Triathlons are not my only goal though (I want to be in the top 10-20%, that is enough for me), otherwise I see that I don't really need to build a lot of muscles - I also want to have some extra upper body strength just because it looks good and it is useful for work and chores. Is it true that muscles that I lost in the weight loss process will return relatively quickly after starting to do fitness?
Thanks for you interest and your answers!