Below,Rachel Mariotti, an NCSF-certified personal trainer in New York City, demonstrates the move.

B.Engage core and pull shoulder blades down and back.

C.Keeping chest up, push through feet to return to standing, squeezing glutes at the top.

Conventional Dumbbell Deadlift

Photo: Jenna Brillhart

Here, James and Mariotti break down the benefits.

During your strength workout itself, using your posterior chain muscles will make you feel like a total badass.

And [during the deadlift], youre getting a lot of muscle mass working at once.

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This extra grip strength has benefits for your daily life too.

Without this engagement, your dumbbell deadlift may not be as effective or efficient, she adds.

So what are you going to do?

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That can translate to somelower back pain.

Photography and art: Jenna BrillhartModel and fitness expert: Rachel MariottiWardrobe: SET Active

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