A top personal trainer shares 3 common mistakes people make when trying to build muscle

Harley Pasternak strength trains for 20 minutes, six days a week. Harley Pasternak The celebrity trainer Harley Pasternak says common gym mistakes can hold back muscle gains. Progressive overload is key to building and maintaining muscle. Pasternak said that giving muscles enough time to recover between workouts is essential. Harley Pasternak has spent 30 years helping people build strength and muscle. In that time, the 51-year-old Los Angeles-based personal trainer, who has worked with Kim…