Sure, using a more effective workout routine or diet plan will work better/faster than a less effective one. However, even when you’re doing everything just right and you’ve optimized every single major and minor factor to work as quickly and effectively as possible (which I’m going to show you how to do), the simple fact is that you’re still not going to build muscle “fast.”
That side note matters because the diaphragm can’t lift any weights. The best way to work this muscle is through breathing. And with any muscle, body weight should be the first place to start when it comes to building muscle and strength. If one cannot engage muscles properly with a push-up or pull-up how can one properly engage muscles during a bench press or lat pull down? They won’t..
Of the three, protein will of course play the most important role in the muscle building process (like calories, it’s one our required “supplies”), although fat and carbs will still be important for other reasons which range from optimizing hormone production (e.g. testosterone, the muscle building hormone) to enhancing training performance and recovery.
These guys are different than traditional deadlifts in that your legs are more or less fixed throughout the lift. Your knees are slightly bent, but this is mostly a “pulling” exercise initiated by the hamstrings and glutes. It likely is more focused on your hamstrings but they need to be strong as well to make you a stronger and more shapely human.
Unfortunately, glute weakness often becomes exacerbated when we sit all day; those muscles don’t activate while seated. “Plus, sitting decreases bloodflow, further deconditioning the muscles,” Pandya says. So, before you do anything else, he suggests getting yours more action: Try to get up for five minutes every hour and, twice a day, squeeze your butt for three seconds and release, repeating for eight to 12 reps.
If you are referring to how many pushups to do in one session, the short answer is as many as you can. Aim for a number that challenges you but is still realistic. Build up from day to day to increase muscle strength. If you are referring to how long you should do pushups as a form of exercise, that is up to you. Pushups are a good part of a long-term or permanent exercise regimen. Remember that if you stop doing them, your muscles will weaken.

Note that this recommendation is for total weekly volume, which means it would need to be divided up based on how many times you’re training each muscle group per week. So, for example, someone training everything twice per week would do 30-70 reps for each bigger muscle group in each of those workouts, and 15-35 reps for each smaller muscle group in each of those workouts. 
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