This is another great exercise technique which is fast becoming a favourite of mine.
The idea is you select a suitably heavy weight that and start the rep of with both hands moving the weight. When you go to lower the weight, you then remove one hand.
That forces the other arm to deal with the weight overload. It's a good way to improve strength and / or add some muscle size.
To start with, I would recommend alternating hands on each rep. If you are more advanced, you can perform them all on one side before switching.
• Sit at lat pulldown station and adjust leg pad so it is resting on tops of legs when knees bent 90 degrees.
• Stand up and grip V Handle with both hands, with neutral grip (palms facing each other)
• Sit back down, brace abdominals and lean backwards slightly from hips.
• Being by pulling shoulders down and breathe in as bending arms at elbows, pulling bar down to upper chest.
• Keep elbows pointing towards the floor as much as possible.
• Once bar touches upper chest, remove one hand from the grip and reverse movement with control with other arm
• Allow bar to rise up until arm is straight. Breathe out as bar goes up.
• Grab bar with other hand again and repeat all reps with other hand. Keep alternating hands on each rep
This is my, mostly, Personal Trainer musings and information which I hope you'll find helpful!