This movement is commonly done using dumbbells to add resistance to the weight of the arms.

The unstable ground adds resistance, making you engage your core and work your body harder.

They can be used to add resistance to almost any whole-body movement.

They are named for the dip exercise, one of the few and best known methods of adding resistance to it.

Some have jets to add resistance and make the dog swim more strongly.

Internal spring-loaded brake pads add resistance depending on the force applied.

This is an awkward exercise due to the reduced stability and difficulty in adding resistance.

Props like a barre, a small ball and a band added resistance.

The weighted ball adds resistance to your exercise, whether it is through stretching or sprinting.

Now let's add one more factor to current and voltage: resistance, which is measured in ohms.