Glutes are king as far as the hierarchy of your muscles is concerned. “For athletic performance, overall lower body power, strength, speed, and everyday optimum function, honing strength in and activating your glutes should be a top priority in all exercise programs,” says Robert Reames, C.S.C.S., Gold’s Gym Fitness Institute and Pear Training Intelligence System’s weight control coach.
To begin, place the top of one foot on a weight bench (or a chair) and step forward with the other foot out in front of you, similar to a lunge position. Make sure that the front foot is positioned at least at shoulder width and it is far enough away from your body that your knee will not come over your toes when you perform the squat. Put your hands in front of your body (or overhead to make it harder). Perform a “single leg squat” by bending the front leg. The knee of the leg that is up on the bench will go towards the floor. Get it as close to the floor as you can. Do not let the heel of the front foot come up off of the floor. Keeping your heel down will ensure that you engage your glutes and hamstrings in this exercise. You should feel the tension in the hip flexor of the leg that is on the bench when you perform this exercise (you will also feel the muscles of the front leg working). It is important to keep your torso upright throughout the full range of motion. As you go down into the squat, the hip of the back leg is going into extension, which will stretch the hip flexor as well as strengthen it as it stabilizes the hip throughout the range of motion.
Often people try to correct a forward tilt of the pelvis by gripping with the abdominal muscles. But besides limiting your breathing and being counterproductive in backbends, gripping the abdominals won't control the anterior pelvic tilt if you have tight hip flexors—not even in simple standing postures. That's why it's so important to make hip flexor stretches part of your daily practice, especially after a long day of sitting. These poses will let you enjoy a new sense of space in your pelvis—and help protect you from compression and pain in your lower back.
Remember my special answer: here it is… MOUTHTAPERS exist. People out there will tape their mouth closed during sleep so that they can breathe their nose. Even during the day sometimes. Why? Because the nose is directly connected to the diaphragm while the mouth is connected to the chest. Sure, increase chest mobility and your lungs may be able to expand more which will allow more air to be held, BUT HOW CAN YOU HOLD THAT MORE AIR IF YOUR DIAPHRAGM is weak? You won’t. So everything I just talked about must be done through the nose. Notice yourself breathing with your mouth and SWITCH right away. It takes work and energy. How you breathe during the day rolls over to how you breathe during the night.