Longest marathon hand drumming

According to Official Guinness Records,

The longest performance on a hand drum was 501 hours and was achieved by Kuzhalmannam Ramakrishnan (India) at the Rhythm Therapy Hall, Nandavanam Hospital, Ottapalam, Kerala, India, from 5-26 July 2009.
An incredible achievement, beating the previous record by 177 hr! Kuzhalmannam already had a record in this category before, with 101 hr, which was beaten in May 2009.

For a complete list of 2009 records, please visit 2009 Guinness Records in India.

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