The hip flexors are prone to becoming tight and shortened. They are active with each step that we take, especially while running. A major contributing factor to their tightness is that based on their location and anatomical attachments, when we sit, we are putting the hip flexors in a shortened position. Unfortunately, many of us spend a good part of our day sitting. The combination of sitting and heavy use of the muscle during activity causes it to become shortened. A shortened muscle does not generate as much power as a normal length muscle is capable of. The shortening and weakening of the hip flexors creates a muscle imbalance in the hip, which can cause problems in other parts of the body.

A 2001 study at the University of Texas found that lifters who drank a shake containing amino acids and carbohydrates before working out increased their protein synthesis more than lifters who drank the same shake after exercising. The shake contained 6 grams of essential amino acids — the muscle-building blocks of protein — and 35 grams of carbohydrates.
Go: Keeping your feet flat on the floor, squat down so the ball rolls up your back, until your quads are just past parallel to the floor. Hold for a count, then lift just your toes into the air to push through your heels as you rise back to the starting position, rotating your glutes and hams inward. Lower your toes back to the floor before starting the next rep.
Most typical bodybuilding programs have way too many sets and reps and use the wrong exercises. However, if you lower the total volume, go heavier, and use compound movements as I’ve outlined above, there is nothing wrong with a body-part split for advanced lifters. In fact, it’s often less stressful to the joints than your average upper/lower split.
There are many potential reasons, but I am going to keep it simple and give you just two. The first and most common reason people suffer from underactive glutes or “glute amnesia” is due to lifestyle. Even when people train hard every day, if they spend the majority of the remainder of the day sitting down, then they are simply not using their glutes. And remember the old saying - if you don’t use it, you lose it. Unfortunately, this is just what happens with your glutes.
I loved football and football culture. But bodybuilding is more than a culture—it's a lifestyle. You can't do it sloppily and succeed, especially if you have high-level competitive ambitions like I do. Your results speak for themselves, and your hard work pays off in ways that you can see, feel, and measure. There's nothing like the feeling when it all comes together.
Longer rest periods are more ideal for making progressive tension overload happen, and shorter rest periods are more ideal for generating metabolic fatigue. So, if you’re doing an exercise that is better suited for progressive overload (i.e. primary compound exercises), you’re going to want to rest longer between sets to maximize strength output. And if you’re doing an exercise that is better suited for metabolic fatigue (i.e. isolation exercises), you’re going to want to rest less between sets to make that happen. And if you’re doing an exercise that is suited equally for a combination of the two (i.e. secondary compound exercises), you’re usually going to want a moderate rest period somewhere in between.
At the same time, this also doesn’t mean that primary compound exercises can never be done for more than 8 reps, or that secondary compound exercise can’t be done for 5-8 or 10-15 reps, or that isolation exercises can’t be done for less than 10 reps. Everything can be done in every rep range. However, these are the rep ranges that each type of exercise is best suited for, and where it should ideally be done most of the time.

Stand tall with your hips square and bend your right knee, bringing your foot towards your bum. Grab the right foot with your right hand and actively pull the foot closer to your glutes. As you do this, send the right knee down towards the ground and keep both knees together. squeeze your butt to promote a posterior pelvic tilt and hold — then switch sides.

Lie on your left side and position yourself so that your bottom forearm is directly under your armpit and your legs are straight with feet stacked. Brace your core and lift your hips in the air, forming a straight line from ankles to shoulders. Next, raise your top leg, without bending your knee, a few inches into the air. Hold for 3-5 seconds, lower the leg, and repeat. Complete required reps then switch sides.

Many non-competitive bodybuilders choose not to adopt this conventional strategy, as it often results in significant unwanted fat gain during the "bulking" phase. The attempt to increase muscle mass in one's body without any gain in fat is called clean bulking. Competitive bodybuilders focus their efforts to achieve a peak appearance during a brief "competition season".[citation needed] Clean bulking takes longer and is a more refined approach to achieving the body fat and muscle mass percentage a person is looking for. A common tactic for keeping fat low and muscle mass high would be to have higher calorie and lower calorie days to maintain a balance between gain and loss. Many clean bulk diets start off with a moderate amount of carbs, moderate amount of protein, and a decently low amount of fats. "Gaining lean muscle means going for leaner cuts of meat, like flank steaks and fillets, chicken, and, of course, fish," says White[who?]. "Enjoy your meat with some starch: rice, beans, quinoa, whole-grain couscous, or sweet potato, for example".[20] To maintain a clean bulk it is important to reach calorie goals every day. Macronutrient goals will be different for each person, but, it is ideal to get as close as possible.

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.