One 'Challenge' star looks like they're gearing up for a massive comeback on the show with their weight loss transformation.

As I continued to train more seriously, I noticed my weight would stay the same—but my body would get more shredded. At this point, my normal weight is 68 or 69 kilos [around 150 pounds].

We're here to outline the one-month strength training challenge to transform your body that will keep your muscles engaged ...