Your obliques have three jobs: resisting side bending, rotating the rib cage and bending the torso sideways. Side planks and carries build the bracing you use in big lifts, while twists and side bends take the muscle through its full range. Use both kinds.
Bodyweight
The side plank is the easiest way to load your obliques with zero equipment. The muscles on the bottom side of your waist hold your hips off the floor and stop them from sagging, with the glute med helping. It scales easily, from a knee-supported version to a raised top leg.
- Stack your feet, or stagger them one in front of the other if balance is the hard part.
- Pull the bottom side of your waist up, as if lifting it another inch away from the floor.
- Once a 45–60 second hold feels easy, raise your top leg or arm instead of just holding longer.
Dumbbells
The catalog lists the obliques as a primary mover in the Farmer's walk, alongside your grip and upper traps. With two dumbbells, they keep you upright on every step. Carry a single dumbbell and they work much harder: the side opposite the weight stops you from tipping toward it.
- For your obliques, hold one dumbbell and keep your free arm out to the side or on your hip.
- Walk with your shoulders level, without leaning toward the weight or away from it.
- Cover the same distance with each hand, and start every set with your weaker side.
Plate
This is where your obliques do their signature job: rotation. The external oblique on one side and the internal oblique on the other turn the rib cage together, while the lean-back position keeps your abs working. If your lower back complains, keep your feet down and shorten the range.
- Lean back only as far as you can keep a flat back, usually around 45 degrees.
- Start each turn from your rib cage so the plate follows your shoulders instead of leading them.
- Pause briefly at each end so momentum doesn't take over and swing the plate for you.
Dumbbells
This is the only move here that takes your obliques and lower back through a full side-bending range under real load. With the dumbbell in your right hand, your left side does most of the work, controlling the lean and pulling you back up. That's why you hold weight in one hand only.
- Slide the dumbbell straight down your thigh, as if moving between two panes of glass.
- On the way up, bend slightly past vertical toward your free hand to fully shorten the working side.
- Finish all your reps on one side, then switch hands and match the same number.
Bodyweight
A crunch with a twist: you bring one shoulder toward the opposite knee, so your obliques work together with the rectus abdominis while your lower abs hold your legs up. The catch is that it's hard to load, so it builds less strength than carries or side bends.
- Rotate your whole rib cage, so your shoulder travels toward the knee along with your elbow.
- Hold the twist for a one-second count before switching sides, so the muscle does the work, not momentum.
- The lower your straight leg, the harder it gets; raise it if your lower back lifts off the floor.
