Though this exercise needs weights, but doing it simply at home won’t need any weights. But keep one things in mind that it’s for biceps only. To do this, follow the simple tips given below:

• Take 1 arm and put it in down to your side.
• Take the other hand of your other arm and put it over the hand of the arm by your side.
• Now try curling up with the 1 arm while resisting it with your 1 arm.
• Do this with enough pressure than it takes 10 seconds to complete the curl.
• After that, switch arms and do with your other arm.
• Keep switching back and forth between your arms.