" Considerations & Exceptions for Impressive Handshakes

• Be mindful of a person’s age; be tender with arthritic hands. In that case, a loose and gentler handshake is a gesture of sensitivity and compassion.
• Show interest; even if your right hand is full, offer your left hand.
• Demonstrate respect when you are caught in an introduction while seated; try to stand.
• Be instinctive about when to allow the length of your handshake to linger to express unity, connection, or sympathy. "

― Susan C. Young , The Art of Body Language: 8 Ways to Optimize Non-Verbal Communication for Positive Impact (The Art of First Impressions for Positive Impact, #3)