You can perform this exercise seated in a chair or on your back on the floor. In a chair, cross your left ankle over your right knee and then lean forward until you feel a stretch in your hip. On the floor, cross your left ankle over your bent right knee and then reach under with both hands and pull your right leg toward your head. Perform each variation on both legs.
Transitioning between these two poses will stretch your entire back, as well as your hips, core, chest, and neck. Start on your hands and knees with your shoulders directly above your hands and your hips directly above your knees. Spread your fingers and press your palms into the floor. As you breathe in, arch your back, lift your tailbone and head, and look toward the ceiling or sky. As you exhale, round your back and tuck your tailbone, tucking your chin against your chest as you shift your gaze to between your knees. Oscillate between these two poses for 10-15 breaths.
How to: Lie on your back with your right knee bent and foot flat on the floor (a). With your left leg fully extended, press into your right foot to shift onto your left hip. This is your starting position (b). Then, squeeze your right glutes to press your left hip open until you feel a stretch, pause, then return to start. That’s one rep (c). Perform six to eight reps, then repeat on the opposite side.
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.
The best thing about this stretch is that you can easily adjust where you feel it simply by changing the position of your foot. First, try bringing your foot inward (effectively externally rotating your hip), and repeat the same sequence of instructions. Then, do the same with turning your foot out (internally rotating the hip). Wherever you feel the biggest stretch is likely the version you should be doing more of.
These exercises can be done three to five times per week; be sure to build in a rest day here or there to allow your hip muscles to recover. Working to strengthen your knees and ankles can be done as well to be sure you completely work all muscles groups of your lower extremities. Remember, your ankle and knee muscles help control the position of your hips, just as your hip muscles control the position of your knees and ankles. They all work together in a kinetic chain.
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.