[header] How to build lean muscle [title] Lift weights for at least 30 minutes 3 days a week. [step] You can use machines, free weights, trx bands, weightlifting classes or a combination of these choices. [substeps] Never go into weightlifting blind. 
It requires correct posture and positioning to correctly target muscle fibers. Take an intro to weightlifting class, buy some sessions with a personal trainer or take classes to learn the basics.