Dumbbell · beginner · upper arms
Dumbbell lunges alternate biceps curl
Also called Lunge with biceps curl, Lunge and curl, Alternating lunge curl, Lunge to curl, Lunge with curl.
This puts a lunge and a biceps curl in the same rep: you step into a lunge with a dumbbell in either hand, and curl as you go down. Your legs are doing most of the work by a wide margin, since they are moving your bodyweight as well as both dumbbells, while the biceps moves one dumbbell through the length of a forearm. The catalog files this under biceps, and the reason that is arguable rather than silly is the load. You can only hold what you can curl, and that is far less than your legs would use for lunges on their own.
How to do it
- Step oneStand with feet hip-width apart holding a dumbbell in each hand at your sides.
- Step twoStep one foot forward into a lunge, lowering your back knee toward the ground.
- Step threeAs you lower into the lunge, curl both dumbbells toward your shoulders.
- Step fourDrive through the front foot to return to standing and lower the dumbbells.
- Step fiveRepeat on the other leg, alternating sides.
What usually goes wrong
Each starts with what you would notice.
The dumbbells get flung up as you drop into the lunge.
WhyThe descent is performing the curl. Your whole body is traveling downward, the dumbbells carry on, and your arms end up catching them at the top instead of lifting them there.
FixArrive at the bottom of the lunge, settle, then curl. Doing the two things in sequence is slower, and it is the only version where both halves get trained.
Your legs are never the part that gets tired.
WhyThe dumbbells are chosen by what your biceps can curl, which is a small fraction of what your legs can lunge with. The lower half of the exercise is running at a weight it does not notice.
FixDecide which half you came for. If it is the legs, lunge with the dumbbells hanging still at your sides and heavier, then curl separately with a weight that suits your arms.
You wobble as the weights come up.
WhyCurling moves the load from your thighs up to your shoulders, so it travels upward at the exact moment your base is at its narrowest.
FixCurl once you are stable rather than while you are still moving, and pick one fixed point ahead to look at. If the wobble stays, do the curls standing between lunges rather than during them.
One arm curls while the other just hangs on.
WhyNothing is wrong here, and it is worth knowing rather than fixing. The demonstration alternates, one dumbbell at a time, while the written steps describe curling both. Both versions are in normal use.
FixPick one and keep it for the whole set. Alternating rests each arm and leaves a dumbbell hanging at your side for balance. Curling both at once is harder to stay upright under and finishes the arms sooner.
What it is for
Lunges alternate biceps curl combines an alternating forward lunge with a simultaneous biceps curl to train the lower body and arms together. It targets the biceps while also developing quad, glute, and hamstring strength for an efficient compound exercise.
Questions people ask
- What does this actually train?
- Your quads take the largest share, working on whichever leg is in front, and the glutes straighten the hip behind them. The biceps curls the dumbbell, helped as always by the two elbow flexors underneath it. Your trunk keeps you standing tall through both halves.
- Is this an arm exercise or a leg exercise?
- The legs move far more weight, because your bodyweight goes along for the ride. The arms decide how heavy the dumbbells can be. That is why it is filed under biceps, and why the label tells you only half of it.
- Does combining two exercises save time?
- You get both in one set, and no study has measured a lift of this shape against doing the two separately. The plain problem is that a single load has to suit two very different muscle groups, so one of them ends up working at the wrong weight.
- Should I curl both arms or one at a time?
- The demonstration alternates and the written steps say both. Either is fine as long as every rep in the set does the same thing. One at a time is easier to balance under, both at once ends the set sooner.
- What weight should I use?
- Whatever you can curl from a dead stop without swinging, which will feel light for lunging. If loading the legs properly is the goal, that is a separate set with the weights held still.