INDIANAPOLIS — F3 is a fitness group for men that started in North Carolina in 2011. Today it's in 42 states with international workouts taking place in Europe, Africa, Australia and Asia, according ...
Men can expect to build 35 to 45 pounds of muscle over their lifetime, and 20 to 25 pounds for women. How easily we build muscle depends on a range of factors, personal trainer Mike Matthews said.
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