London: Singer-actress Jennifer Lopez feels her fitness has gone for a toss after she found herself out of breath in running scenes while filming her new US TV drama 'Shades Of Blue'.

Jennifer Lopez
Jennifer Lopez. Pic/Santa Banta

Lopez, 46, said she was so focused on fine-tuning her acting skills, she missed out on gym visits, and quickly realised she needed to get back into shape as filming began, reported Contactmusic.

"I'm in serious actress mode right now. I haven't been working out as much while I've been doing the series, so I feel a tiny bit out of shape right now, but that's OK," she said.

As "Shades of Blue" debuts in next month, Lopez will be in rehearsals for her first residency in Las Vegas. The show, titled "All I Have" and she promises fans she'll be in tip-top shape by then.

"I know it in my mind, because I'm like, 'OK, now you're going to start dancing eight, nine hours a day and it's going to be a whole different story'. And we'll tighten it up right quick."