What excersices can replace weights when trying to gain muscle mass can I get the same amount of muscle mass with that excersices that I could’ve with weights?

Describe the concept of interval training. what is the benefit of this type of training?

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?

What is a possible consequence of abusing intravenous drug such as heroin? a-hiv transmission b-alcohol poisoning c-improving appetite d-lung cancer