Why is sleep so important to losing weight?

Here a few reasons:

1. Sleep promotes leptin and leptin is your satiation hormones. Being more satiated will help you eat less.

2. Sleep lowers ghrelin and ghrelin is your hunger hormone. Feeling less hungry will definitely make eating at a calorie deficit easier.

3. Sleep lowers cortisol and cortisol causes appetite increase which can make you eat more. Having less cortisol also reduces the chances of muscle catabolism (muscle burns more fat at rest).

4. Sleep can promote healthy thyroid and thyroid is your metabolic hormone.

To learn more on why sleep is essential for weight loss and also more about various hormones that can affect weight loss:

What do I do if the bench press is stuck on me?

You have reached plateu. That is a significant benchmark for many things like your strength level, overall performance, setup strategy, goals and so on.It described your level of your foundation as well which is back - lattissimus dorsi, upper/middle trapezius, the rotator cuff, levaeto scapulae and others. These form a

Can calisthenics (even advanced calisthenics) give you the same ripped physique that weights can?

Yes they can for your upper body, but it's pretty difficult to achieve the same level of resistance for your lower body - pistol squats and single-leg sliding leg curls will fare you well until you move onto barbell squats and deadlifts. To attain similar resistance