Do it: Stand with your feet hip-width apart and hold a dumbbell in your right hand, palm facing inwards towards the torso. Keep your back straight, activate your core, and then bend to the side as far as possible—but only at the waist. Hold for one second at the bottom of your range of motion, and return to start for one rep. Do between 12 and 20 reps for one set.
I use the ab machines at the gym. I do a couple variations on crunches (sitting up and lying down both on machines with weights. I can crunch 55lbs on the one that’s sitting position, 40 on the other), hanging leg lifts (which kill my shoulders), the oblique twist machine, as well as full body workouts. I just started the gym about 2 months ago and have really upped the weight since then so my body is definitely progressing.
Contrary to what popular culture portrays, one does not need to lift really heavy if muscle hypertrophy, aka “bigger muscles” or aesthetic gains are the primary goal (see bodybuilding vs powerlifting). One needs to ensure that a particular muscle is subjected to enough time under tension and training volume to ensure that muscle fibres are broken down and rebuilt stronger over time. This can be done by following a high-volume, moderately high rep range, moderate weight and low rest period lifting routine. I start off with 5 sets of a heavier compound lift eventually moving to isolation exercises. I started off with the popular ‘3 sets of 10’ for isolation exercises, then to 12 and now hit 4 sets with the rep ranges 15,12,10 and 8. Higher reps would mean a lighter weight and vice versa. My last set is almost invariably a dropset. I hit around 15 -18 working sets per muscle group per week.
"My goals six years ago was to 'get abs' and I used to think cardio and crunches would get me there. But it wasn’t until I started lifting weights and varying my abdominal exercises that I started to see a major change. You don’t realize how much you use your core muscles in order to perform powerful rapid movements like deadlifts!" — Shante Franca, @shantefranca
To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.