Sometimes these do-it-yourself bodybuilding diets can lead to unhealthy habits, as in this case study about over-consuming protein and this one about over-supplementing. Consuming too much of certain macronutrients (such as protein) or micronutrients (such as zinc) can lead to health risks, sometimes long-lasting ones. And eating an unbalanced diet can affect sports performance, which does not help you reach your goals. Talk to your physician or a qualified nutritionist about any supplements you plan to take.
Focus on those exercises, trust me, you won't regret it. Also, don't be afraid to add weight to the bar as well, as long as your form is in check. Overloading the muscles is essential for growth because the body doesn't need to adapt if nothing's changing. Therefore, you must force your body to change by adding weight or another repetition on that exercise that next time it comes around.
Of course, cardio is an important part of fitness too, but the benefits of strength training are major. Strength training helps build muscle, and lean muscle is better at burning calories when the body is at rest, which is important whether you're trying to lose weight or maintain it. It also helps strengthens joints and bones, avoid injury, improve your muscular endurance, and will help you give it your all during your other workouts, whether that means setting a new PR if you're a runner or pushing (and pulling) a little harder with your legs during your favorite indoor cycling class.
Including a small amount of higher sugar and/or higher fat food here and there (I usually try to refrain from using the term “cheat meals” as it wrongly implies that you’re doing something outside the rules) is not going to negatively affect your muscle building or fat burning progress, and it will make your overall eating plan much more enjoyable while still delivering the same results.
The amount of exercises and sets a bodybuilder would use would vary among each individual. Some bodybuilders, like Arnold Schwarzenegger and Sergio Oliva, would do multiple exercises and sets for each muscle group to insure that the muscle was being properly trained from each angle. They would normally do up to 5 sets per exercise and 4-5 exercises for each muscle group for a total of 20-25 sets for each body part.
For every person who lifts weights these days, it seems there are two who have a podcast about it. There are more bodybuilding tips promising greater strength and muscle than ever before, and along with them a ton of confusion; one buffed-up Instagrammer says lifting heavy will get you swole, while a well-known fitness personality has claimed in recent years that two 30-minute workouts per week netted him 34 pounds of muscle in a month.