How Long Does It Take "Open Incisions" to Close and Later Bruising Normal?

I had a revision 6 days ago on stomach and inner thighs, this doctor left he incisions open there was almost no pain, no bruising and little swelling. However I've noticed little bruises surfaced today, 6 days later, is this normal? Also the incisions were left open and I'd love to know if anyone can advise as to how long they take to close? I am keeping them clean and apply steri strips, no longer draining, they are tiny but I'd like to start working out and fear infection if sweat gets on it.