Bicep Curl

Body Position: 
  1. In standing position, arms straight and elbows close to the body, weight (barbell/dumbbell) touching mid-thigh
  2. Keep head straight, push chest out and flex elbows, moving weight towards the shoulder
  3. Slowly release arms back to starting position

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Positions: 
Arms straight and close to the body, weight touching mid-thigh.
Flex elbows, moving weight towards the shoulder.
Common Errors: 

Elbows away from trunk
The back remains convexly curved – no straight line