A trainer explains how to perform four gym workouts for fast, sculpted abs that engage your core from every angle.

Whether you’re a complete newbie to strength training or a diehard gym rat, this weight bench workout is ideal if you’ve got limited time as it targets your entire body using supersets.

I can do step-ups and lunges on it (and it's even better than a traditional bench, thanks to its ultra-hard surface). I can also use it for incline biceps curls and light ab exercises." ...

effective workout. "The basic crunch is often demonized but it's a great move to isolate the abs and focus on core stability," she says. "By pressing your heels into a bench, table, or couch ...

He designed this beginner workout to be more concerned with ... Squeeze your shoulder blades to drive them back into the bench, and squeeze your abs and glutes. Kick the weights up to your chest.