[Energy expenditure in workers who install plastic and metal pipes for water supplies and sewage]

The mounting of plastic and metallic water and sewage tubes is the type of work that requires a very high energy expenditure: 45 kJ/min, 9631 kJ for eight working hours and about 17,000 kJ for a working day. Working conditions involve a very demanding working posture, carrying of heavy loads and poor weather conditions. The work is considered to be very heavy physical work.