The average person can gain anywhere from 1/2 lb to 4-1/2 lbs in up to 6 months of consistent weight lifting (a.k.a. strength training).
Women will tend to gain weight towards the lower end of this range (1/2 lb) and men towards the higher end.
If you’re concerned about gaining weight, the benefits of strength training far outweigh the small increase in weight you may experience
Sources: ACSM’s Guidelines for Exercise Testing and Prescription, 7th ed. (2006).
The ability to gain large amounts of muscle and weight through weight lifting is linked to genetics and other factors. This ability is limited for the average person.
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