India, Nov. 23 -- A ctor Samantha Ruth Prabhu continues to show that discipline and consistency are central to her fitness journey. Known for her chiselled physique and intense training routines, the actor took to Instagram on Friday to share how she once believed she could never build a strong back, until her training proved her wrong. She also shut down a troll who commented that she looked "too thin". Sharing a picture highlighting her toned back muscles, Samantha wrote, "A few years ago I had pretty much given up on ever having a strong back. I genuinely thought it just wasn't in my genes. I'd see other people with great backs and think, 'Yeah, that's not going to be me.' But I was wrong. And honestly, I'm glad I was. So yes, I'm going to show it off now, because the work it took to get here was intense. Like intense intense." She added, "Showing up on days when I didn't feel like it, when nothing seemed to be changing, when it would've been easier to quit. Building muscle is so important. Not just for how you look, but for how you live, how you move, how you age. As you get older, strength training needs to become your best friend." Samantha wrote that strength training taught her discipline and patience, and helped her overcome beliefs she once held about her genetic limitations. "If you're at that point where you're close to giving up, don't. Your future self will be so grateful you kept going." HTC...