If you are standing, the hip flexors lift your leg when you step up on a stool. If you are lying flat on your back, the hip flexors can either lift your leg or lift your torso into a sit-up. In yoga, Navasana (Boat Pose) is especially good at strengthening the iliopsoas because it demands that the muscle isometrically contract to hold up the weight of the legs and torso.
A: Start with the calculations above but don’t be afraid to adjust up or down. Your metabolism and physiology will adapt to more food by trying to maintain homeostasis and regulate your bodyweight. Some may have to increase more than others but the number on the scale doesn’t lie. If it’s not going up, then you probably need to increase your calories.
Of course, you know what it feels like to have a tight muscle. But tight hips aren't just uncomfortable—they can lead to all sorts of other aches and pains, especially in the lower back. "People focus on the hips and say their hips are tight, but we don't always think about the fact that the lower back connects to our legs at the hip," Charlee Atkins, C.S.C.S., instructor at Soul Annex in New York City and creator of Le Stretch class, tells SELF. Tight hip flexors make it harder for your pelvis to rotate properly, which can cause your lower back to overcompensate, "and this can be a setup for lower-back injury," Teo Mendez, M.D., an orthopedic surgeon at NY Orthopedics who focuses on operative and non-operative management of sports-related injuries, musculoskeletal injuries, and arthritis, tells SELF.
How to do it: From your hands and knees, move your hands out from under your shoulders so your arms are extended at roughly a 45° angle. Tuck your toes under your feet. As you exhale, straighten your legs and lift your butt and midsection toward the ceiling. Your knees should be slightly bent, and you should be up on your toes. Now drop your head between your arms, straighten your arms and legs, and push back on your feet. Press your heels into the floor, or as far as you can go. Hold for two seconds.

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.
Other things would be….the main reasons “diets” work like keto, is because you are eating less food. Eating less will help always if you have been eating too much. Each diet has a specific way of doing things. Keto is cool because it drops the carbs. Dropping carbs is dropping calories. Dropping calories is eating less. Also, as we drop carbs we lower our glycogen levels which means we lower the risk of carbs turning into fats. If we just have fats being stored as fat, then we are doing better than bother carbs and fats being stored. This doesn’t mean carbs are bad because they are being dropped. This just means carbs are being dropped to get your glycogen levels back to “normal”. Also, with dropping carbs we drop the amount of work insulin has to do. Insulin does a lot during a surplus, so by dropping carbs, you drop calories and increase insulin sensitivity. Even if you don’t drop carbs, you still are improving insulin as you aren’t making it work in a surplus any more. Even though protein still spikes insulin, we are still improving it by letting ONLY protein spike insulin rather BOTH carbs and protein.
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. 
If you’ve been training longer than 6–12 months, you can split your workouts into upper- and lower-body days. The most common setup is to train upper body one day and lower the next so that each area gets trained twice in one week. If you train four days per week, you can train upper body on Monday, lower Tuesday, rest Wednesday, and then do upper body again on Thursday, lower body on Friday, and then rest on the weekend.
This exercise is challenging and will certainly be beneficial even without weights. If you can execute perfect form with your body weight, you can make the exercise harder by adding weights to your hands, by stepping on an unstable surface with your front foot (balance disc, foam pad), or you can place your rear leg on an unstable surface such as a physioball. You should be able to comfortably perform 2-3 sets of 10 reps on each leg before advancing this exercise.
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