A torn ACL in a young person like you may put you at risk of further injury to knee like meniscal tears, which may lead to early arthritis. Hence, an orthopaedic will have to assess you for instability and address it if any.
Regarding weight loss and body building, you need to set realistic goals and work towards them. First try to acheive the ideal body weight for your height according to BMI. As you continue to weight train, you will gain muscle. Genetics and your workouts may influence how fast you gain muscle.
Answered2016-04-29 06:44:20
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