Unfortunately, there are 
a number of ways we jeopardize 
the health of this important muscle group. For starters, our increasingly sedentary lifestyles are leading to what experts call “gluteal amnesia,” in which the butt muscles become overstretched and underused (read: weak). On the 
flip side, it’s also possible to overuse and overexert these muscles—whether we’re excessively clenching the tush in certain asanas, such 
as Warrior II or Wheel Pose, or pushing too hard while running or hiking. Not only do under- or overworked glutes affect range of motion in the hips and sacrum, but strength imbalances can also lead to instability or pain when we’re 
on our mats. 
Rest your hip. Sore hip flexor muscles can benefit from rest. Avoid the activities that caused your pain. Ice your affected hip for 20 minutes at a time, several times a day. Keep the leg of your affected hip elevated as much as possible 48 hours from the first onset of pain. You can also take over-the-counter pain medications to help control pain.
"Your glutes are made up of three different muscles, the gluteus maximus, medius, and minimus," says Lefkowith. "They externally rotate your hip, abduct your hip, extend your hip, and even posteriorly tilt your pelvis." Because of this, it is important that you not only work one or two of these muscles, but rather, focus on showing all of them some love. "If you were only to do moves in one plane of motion, say a front lunge or squat, you wouldn't work your glutes to strengthen all of the joint actions they can perform."
Learning to activate your glutes is important so that you can strengthen them. Strong glute muscles are extremely important as these muscles can have a major impact on your overall body strength; your glutes support your core, help to support a range of exercises and compound movements, as well as help avoid muscle imbalances which can lead to decreased mobility. 
Reaching failure matters because tension matters. Failure is when the muscle cannot generate anymore force. Which means one applied (worked out) enough tension through the muscle to just want to give up. And guess what? Carrying groceries can do this for some. Why? We are all at different strength levels. So don’t worry about other people and what they can or cannot lift. I say this because FAILURE can be achieved with either light weights or heavy weights.

“Imagine you've fasted for over eight hours,” he says. “At breakfast, you're firing your metabolism off really high. If you don't eat for another five hours, your metabolism starts to slow right down and you have to try and kickstart it again with your next meal. If you eat every two and a half to three hours, it's like chucking a log on a burning fire.”
On harder training days, I consume upward of 500 g of carbs. It all comes down to finding the amount of carbs your body can actually utilize and consuming them strategically, rather than letting cravings or social situations determine it for you. Out-of-control carb intake leads to unwanted spikes in insulin, which lead to fat gain. It's that simple.
You can't scroll through Instagram without clocking a mammoth cheat day feast, but are real-life bodybuilders consuming such a crazy amount of calories every couple of weeks? Not quite. When he’s dieting for a competition, Terry incorporates ‘re-feed days’ into his schedule. This means he eats the exact same food, but essentially doubles the portion sizes.
Athletes with marked weakness of the hip abductors will exhibit the classic Trendelenburg gait pattern. Hallmarks of the Trendelenburg gait pattern are depression of the swing phase pelvis (as the stance phase hip abductors cannot resist the pull of gravity on the unsupported side of the body).4,8,13 Athletes often find ways to compensate for a relative weakness, such as with a compensated Trendelenburg gait pattern. With this pattern the athlete exhibits increased deviation of the body in the frontal plane toward the stance leg. This causes a decrease in the moment arm of gravitational forces pulling on the unsupported half of the body and a relative decreased load on the stance phase hip abductors (Table 12-1).8,13

When you’re doing higher reps, focus on the muscle you are trying to build and squeeze every ounce of effort out of it. Yes, cheesie as it may sound, visualizing the muscles working and growing while you train them can be helpful. A 2016 study in the European Journal of Applied Physiology found that, when lifters thought about their pecs and triceps during a workout, they activated them better.
This leaves you frustrated and yes……….with consistently tight hip flexors.  A crucial step is often missed with trying to stretch away tightness or pain. Before anymore blame is placed on the hip flexor muscle, it needs to be properly assessed. Then after an assessment is performed you can determine what the right hip flexor exercise for you to do is.
Elsa Pataky's trainer, Fernando Sartorius, says that focusing on squeezing your glutes while performing a booty-blasting exercise allows you to activate the muscle group to their maximum potential. Cameron Diaz's trainer, Teddy Bass, founder of the trademarked booty-sculpting program called Rock Bottom Body, says you should get into a bridge position and memorize what it feels like to really engage your buns—and then try to feel that burn every time you work your butt. The point: Thinking about squeezing your glutes (and actually squeezing them) while strength-training helps you work the muscles in your butt harder.
That pump is tangible, real-time biofeedback to let you know that blood is flowing to your muscle cells, beginning a chain of events that stimulates protein synthesis. Maybe that'’s why it's easy to overlook how important good nutrition is in the mass-building equation. When you choose to eat, say, chicken instead of ice cream, there'’s no immediate muscle gratification -- no pump to keep you motivated. 

While it'’s okay to chow down on the occasional fast-food choice for convenience, a mass-gain program isn'’t an excuse to gorge on pizza and chocolate sundaes. “"Rebuilding muscle tissue broken down by training requires energy -— in other words, calories,"” says bodybuilding nutritional guru Chris Aceto. "“But many people, including many nutritionists, overestimate the energy needs for gaining mass, encouraging extreme high-calorie intakes. This often leads to an increase in bodyfat, making you bigger, for sure, but also leaving you fat." In general, aim for 300-500 more calories every day than your body burns through exercise and normal functioning (multiply bodyweight by 17). And that'’s divided among six meals a day.
Bodybuilders often split their food intake for the day into 5 to 7 meals of roughly equal nutritional content and attempt to eat at regular intervals (e.g. every 2 to 3 hours). This method can serve two purposes: to limit overindulging in the cutting phase, and to physically allow for the consumption of large volumes of food during the bulking phase. Contrary to popular belief, eating more frequently does not increase basal metabolic rate when compared to the traditional 3 meals a day. While food does have a metabolic cost to digest, absorb, and store, called the thermic effect of food, it depends on the quantity and type of food, not how the food is spread across the meals of the day. Well-controlled studies using whole-body calorimetry and doubly labeled water have demonstrated that there is no metabolic advantage to eating more frequently.[38][39][40]
How many calories your metabolism needs in order for one to stay the same weight will depend on ones weight as mostly everyone weighs a different number (and some the same). People that weigh more will have a higher metabolism because their body requires more food then if someone that weighed less. People that weigh less will have a lower metabolism because their body doesn’t need as many calories compared to someone weighing more.

I fortunately remember the nutrition label for many foods. If it doesn’t have a label, I remember what I’ve studied. It just sticks mentally and saves me time as I don’t have to input my calories via tracking. I use to track calories (started like 5yrs ago) which did help me get a better understanding (started to remember within 6m) of which foods had what and at what amount.

For the sake of mental focus, it’s best to keep any carbs you eat low during the day when you’re working and active and get the lion’s share of them at night with dinner. A typical breakfast could include eggs, yogurt, and fruit, or a shake, and lunch could be meat or fish and steamed veggies. For dinner, have meat or fish again, along with sweet potatoes or rice, and vegetables.
Overdeveloped and tight hip flexors can contribute to lower back pain by causing the pelvis to tilt forward. To counteract this, you must stretch the hip flexors and strengthen the Abdominal muscles. This will reduce pelvic tilt and decrease lower back pain. Strengthening the lower back can also help improve the balance between the muscles of the hip region.

Exercising can help “burn” calories to help you reach a deficit. If you ate more than you meant to, you can exercise to compensate. Exercising into a deficit is not needed if you already or can eat into a deficit. Exercising is great, but not needed. It just helps. For instance, exercising to build muscle helps because muscles demand a lot of energy, so it will feed off your body fat. The more muscles you have the more calories you burn. Usually, body fat calories. If one is lean, then they need to eat food (fats) to keep up. Like me, I don’t have much body fat for my muscles to enjoy from, so I must eat fats. I’d rather have my muscles use fats from food than fat from my body. Protein for size and strength, carbs for immediate energy, and fats for sustained energy.
Another benefit of protein is that it doesn't raise insulin like carbs do. Insulin is a powerful hormone, and elevating levels at non-optimal times—basically any point in the day besides post-workout—can lead to increased fat storage. By eating lean protein often and carbs more strategically, I keep my insulin levels in-check until the time comes when I want to raise them.
(1) Water - I drink this all the time. Mainly in the morning. Doesn’t it make sense to hydrate upon waking up? I use to get nauseous, but that was because of a poor “diet”/food choices. Now, it’s like a filtering fluid at this time of day (morning). I drink it all day, but I have like 1 water bottle every hour. It’s easy to remember and to do (well, for me). We should aim for around 100oz of water, consuming all this in one time would suck. So “timing” water (which is a nutrient) is considered “nutrient timing”.
In addition to adequate protein, you need more calories (your protein intake contributes to your total caloric intake, so these two go hand in hand). Use the following formula to calculate the number you need to take in daily to gain one pound a week, and break down your diet using the macro guidelines listed above. (Give yourself two weeks for results to show up on the scale. If you haven't gained by then, increase your calories by 500 a day.) 

(4) Fats mixed with Carbs make you even more fat. I other words: Fats with Carbs can lead to retaining more fat. Remember fats get stored as fat and carbs will only get stored as fat once glycogen is full. Which means….if your glycogen is full and you combine carbs and fats in a meal…then yes, you will store more fat compared to eating just fats or carbs by itself. Why? Well, fats get stored as fat and then the carbs have to get stored as fat as well due to glycogen being full….that is stored fat from two sources, rather than just one. If your glycogen wasn’t full, then only the fats would get stored and the carbs would just go towards glycogen. This is my next point for you.
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.
A sedentary lifestyle can lead to having weak and tight hip flexors as they are always in the shortened position. Tight hip flexors can lead to a limited range of motion, poor posture, lower back, and hip pain, and even injuries. These muscles need to get a workout when you are standing and doing movements such as raising your leg to climb stairs, run, or ride a bicycle.​
On harder training days, I consume upward of 500 g of carbs. It all comes down to finding the amount of carbs your body can actually utilize and consuming them strategically, rather than letting cravings or social situations determine it for you. Out-of-control carb intake leads to unwanted spikes in insulin, which lead to fat gain. It's that simple.
Just because your hip flexor region feels sore doesn’t necessarily mean the muscles there are tight — in fact, they might need strengthening. This is where that sports science debate we mentioned earlier comes into play. It’s important to identify whether you’re tight or if the muscles are weak. Again, the Thomas Test will help you identify if you’re maybe stretching something that actually needs strengthening.
It’s not just about lifting—it’s about lifting safely and correctly. And if you’re not performing exercises properly, it’s impossible to make any progress. “When someone is just starting to work out, it can help to work closely with a knowledgeable personal trainer in order to learn proper form,” says Ingram. But that goes for experienced lifters, too. If you aren’t sure about a movement, it’s better to ask. “If you’re not working the correct muscles, you can’t expect them to grow,” explains Ingram.
How do I know if my weights are heavy enough? Check your form. This workout involves many repetitions of the same exercise and you will know you are using the correct weight if your form stays consistent between the first part of a repetition set and the end. For example, a row from plank should look the same on repetition number 10 as it does in repetition number two, even if the effort is much greater. If your form is wobbly by the end, drop down the weight amount until you’re able to find consistency. Don’t forget that working with weights is not an all-or-nothing proposition. Your body also provides resistance. Try our 9-Minute Strength Workout for a weight-free option. 
When it comes to building lean muscle, size bodybuilders are king. That’s their ultimate goal. Sure, Crossfit, powerlifting and all the other modalities will build muscle, but that’s not their focus. They want performance and any muscle they build is a side effect. Not so with bodybuilding where muscle size and shape are the priorities. Learning how to build muscle for the sake of building muscle has some benefits to the performance athlete. It allows for ais less injury prone. Its also a fact that bigger muscle contract harder regardless of technique or form, so it’s a good strategy to throw in some bodybuilder muscle building sessions here and there to give yourself stronger muscles to then train for performance. Build the muscle bigger, then train it to perform better.