New Delhi, May 16 -- Even if unevenly, Karl Marx stays in popular memory for his 1848 clarion call asking workers of the world to unite as they had nothing to lose but their chains. Unevenly because we have come a long way since the days of chimney sweeps in Europe. Or have we? Uneven workloads persist.

A recent study by South Korean researchers, published in the journal Occupational Health and Environmental Medicine, says some of us may be working too many hours for our own good. This is not just work-life balance stuff. These scientists, from South Korea's Chung-Ang University and Yonsei University, who followed 110 healthcare workers split into 'overworked' and 'non-overworked' groups, found basic shifts taking place in the physiology...