Toning up those jiggly arms isn’t just about looking good in a sleeveless dress (though it certainly helps that, too).

A strong upper body reduces your risk of injury in day-to-day activities, says Daniela Nahas, co-founder of the Best Body Bootcamp and our guide to getting in shape for the summer.

“You’ll perform simple exercises much more effectively: picking up your kids, running with your dog, carrying heavy boxes, and any movements that require you to push and pull.”

And if it gets you closer to Michelle Obama arms, so much the better.

Nahas recommends tricep dips, a simple move that targets the back of the arm — a weak area in women, she says, and one prone to telltale wobbles.

Tricep dips

1. Sit at the edge of a chair or bench, feet flat on the floor in front of you. Hold on to the chair/bench seat, on either side of your thighs.

2. Move your butt forward off the chair, supporting your weight with your arms, with knees bent 90 degrees.

3. Slowly bend your elbows and lower your body straight down, keeping your shoulders, back, and butt close to the chair/bench.

4. Raise yourself back up and return to sitting position. Repeat as many times as you can; this is one set – do three sets. For an additional challenge, do the move with your legs straight to the floor or with your feet on a stability board.