«When you have an industrial economy like in the past where people... do a lot of physical work and people live less years, it's OK to retire at 65,» Slim told CNBC. (entrepreneur.com)
It is especially good if you do a lot of physical work in the morning that requires extra energy. (smallfootprintfamily.com)
Labor and birth requires a lot of physical work and endurance. (attachfromscratch.com)