You're more likely to get a hip flexor injury if you've had one in the past, you don't warm up properly before engaging in athletic activity, your muscles are already tight or stiff, or your muscles are weak from being overused. If, while exercising, you try to do too much at once in too short an amount of time, you can also put yourself at risk for a hip flexor injury.
While the number of reps you do per set is important, of equal importance is the total number of reps you do per muscle group. The National Strength and Conditioning Association has determined that, to maximize growth, you need approximately 20–70 total reps per muscle group. Depending on which end of a rep range you’re working, this can be done in one session or over a few days (a training week, for instance), but that’s the spread you need to cover to see gains.
Any exercise that works and/or stretches the buttocks is suitable, for example lunges, hip thrusts, climbing stairs, fencing, bicycling, rowing, squats, arabesque, aerobics, and various specific exercises for the bottom. Weight training exercises which are known to significantly strengthen the gluteal muscles include the squat, deadlift, leg press, any other movements involving external hip rotation and hip extension.
When these muscles are under constant tension because of ergonomics and habitual postural positioning, they may become tight and shortened. This can result in pulling forward on the lumbar vertebrae, creating hyperlordosis and causing the pelvis to tilt anteriorly. This is commonly seen in people who maintain a seated position for a prolonged period such as office workers, computer programmers, and others who find themselves sitting at a desk for hours every day. It is important to provide education on proper ergonomics, movement, and self-care to these individuals.

Manipulating carbs is one thing, but dealing with fats is another. Bigger people already have enough fat, they don’t need to eat fat. They don’t need keto. Skinny people don’t have much fat, which means they should eat it. Doing Keto is helpful. BUT, skinny people fasting during Keto is nonsense because they don’t have enough fat to sustain a fast. Bigger people don’t need to worry about fasting during Keto because they shouldn’t even be doing Keto.
Firstly, let’s establish where your glutes are and what they actually refer to! Your ‘glutes’ — or your gluteal muscles, as they are more formally known — refer to the muscles in your butt. Specifically, there are three major muscles in this area: your gluteus maximus (the main, large muscle that shapes your backside), your gluteus medius and your gluteus minimus (two smaller muscles that assist the gluteus maximus in moving your body).