Muscle mass!
(I am a 19 year old female) So I started the gym 5 weeks ago, going 3 days a week for one hour a time. Here is what a typical session for me at the gym looks like: Treadmill 8km/hr-10 minutes Elliptical-10 minutes Rowing machine, highest setting-9/10minutes (1000m then another 3 minutes later on, in between using the…