The notion that sitting isn’t good for you isn’t new, but if you think regularly running cancels out the negative side effects of sitting all day, well, you’d be wrong.

Research indicates that no matter how much you exercise, sitting for excessively long periods of time is a risk factor for early death. And it definitely inhibits your exercise performance—you can’t, for example, sit for eight hours at work and then get up and run five miles without it affecting your body. All that sitting results in tight leg muscles and other issues.

“Sitting all day will make the front of your body tighten up—especially your hip flexors, rectus femoris (a quad muscle), pectoralis (chest), upper traps (upper back), and anterior scalenes (the front of your neck),” explains David Reavy, a Chicago-based orthopedic physical therapist at React Physical Therapy. “When these muscles tighten up, it creates musculoskeletal imbalances. For example, tight hip flexors can cause an anterior tilt, which shuts down your abdominals and your glutes. So if you run after prolonged sitting, then those big stabilizing muscles simply won’t work.”

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Obviously, the best things to do would be a) practice good posture and b) stay active throughout the day. But because that’s often easier said than done, you have to warm up, says Rachel Straub, a certified strength and conditioning specialist and co-author of Weight Training Without Injury. “If you put your body into full drive after it’s been at rest for an extended period of time, you are simply setting yourself up for injury.” That doesn’t necessarily mean you have to do an intense stretching session, but you should make time to stretch and open up these little muscles that may be extra tight after you’ve been riding that desk. Here, the perfect stretches for after you’ve been sitting all day.


Your Pectoralis Muscles

    Why you need to stretch them after sitting: “We tend to lean forward or slouch when we sit, which creates an anterior tilt of your ilium and scapular,” says Reavy. “That anterior tilt shortens your pecs,” (your chest muscles) which can lead to postural problems and shoulder pain, considering the rounded shoulder posture it can create.

    How to open them up: “The best way to stretch or open your pecs is to perform movement patterns that pull your shoulders back,” says Straub. You can do this with foam rolling, stretches, or strengthening exercises, but her number one exercise for this is a reverse fly. “It strengthens your back and stretches your pecs,” she explains. “If your back muscles are weak, you will have a greater tendency for tight pecs. So usually solving flexibility problems is best complemented by also strengthening the opposing muscle.”

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    Start standing with feet shoulder-width apart and dumbbells in hand. Hinge at the hips so that back is nearly parallel to floor and bend knees slightly. Let the dumbbells hang straight down, palms facing each other. Keeping back flat and torso steady, engage back muscles to lift arms straight out to sides until they’re in line with shoulders. Your upper body will form a “T.” Return to starting position then repeat for 3 sets of 12 reps.

    If you do want a stretch, cross your arms in front of your body, then pull your arms back behind you as far as possible. At the end point, hold for 15-30 seconds then repeat. You should feel a stretch in your pecs, along with contraction of your back muscles.


    Your Hip Flexors

    Why you need to stretch them after sitting: When you sit, your hips are flexed—and when your hips are flexed, the muscles of the hips shorten. “And if your hips are placed in a shortened position for an extended period of time—and you don’t do exercise to extend the muscle back to a normal length—this then pulls your pelvis into a more forward position,” explains Straub. And that can lead to limited mobility and lower back pain, she adds.

    How to open them up: “You have to release your hips before you can stretch them,” says Reavy. Any muscle that bends the knee and/or pulls the thigh back will help. A simple lunge is hard to beat because it does both.

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    Stand tall (holding dumbbells in each hand at sides is optional). Take a big step forward with right leg and lower body until right thigh is parallel to floor and right shin is vertical. Make sure front knee is tracking directly above ankle, and other knee doesn’t touch the floor. (Both knees should bend 90 degrees.) Keep the weight in your heels. Press into right heel to drive back up to stand. Continue on right leg for 8 to 12 reps. Then switch sides. That’s one set. Complete 3 sets.


    Your Spine Stabilizing Muscles

    Why you need to stretch them after sitting: “When you’re slouching, it puts extra stress on your thoracolumbar fascia—a membrane throughout the abdomen and lower back—and paraspinals,” says Reavy. “Some of the biggest muscles attach to your thoracolumbar fascia, including your abdominals, lats, and glutes.” If these muscles don’t have adequate strength and/or endurance, the demands of sitting (or holding your core up) become too much and you’re setting yourself up for pain.

    How to open them up: Opening your hip flexors is key—they cross eight joints, including your entire lumbar spine. And then there are exercises that help: “Planks and push-ups require you to activate your spine stabilizers to maintain a neutral spine,” says Straub.

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    Julia Hembree Smith

    Start at the top of a push-up position, shoulders directly over wrists. Draw shoulders down and back and engage abdominal muscles tight to keep hips in line with shoulders so your body forms a long, straight line. Squeeze legs and glutes for support and hold this position for 45 to 60 seconds, or lower chest to hover above floor before pushing back up to start for a full push-up.


    Your Piriformis

    Why you need to stretch it after sitting: Your piriformis is a muscle located deep in the butt, behind your glute max. “Sitting positions your pelvis in a way that doesn’t allow your glute to engage when you run or walk,” says Reave. “So what does engage? Your piriformis.” If that muscle gets too tight, it can shorten and put pressure on your sciatic nerve, adds Straub. The end result: agony.

    How to open them up: The best way to do this depends on your level of flexibility. Pigeon stretch feels great to some people, others might prefer to lay on their back and do figure-four pose. A standing version can be easily adjusted to your flexibility level, says Straub.

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    Matt Rainey

    From a downward dog position, draw right knee to chest, then lie right shin on floor so that shin is parallel (or almost parallel) to top edge of mat as you lower down to mat with left leg behind you. Sit up tall, then walk hands forward if that feels good for you. Hold for 30 seconds. Repeat on other side.

    If you’re too tight for pigeon, you can try a figure-four pose.

    stretches for sitting all day  stretches for tight leg muscles
    Mitch Mandel

    Lie faceup with both knees bent, feet flat on mat. Cross left ankle over right knee and keep left foot flexed. Thread hands between legs to grab behind right thigh and pull right leg toward chest until you feel a stretch in left hip. Hold for 30 seconds. Repeat on other side.


    Your Plantar Fascia

    Why you need to stretch it after sitting: Your planter fascia is the connective tissue that runs from your heel to the base of your toes. When you sit all day, it—and the other muscles of the foot—tend to be in a shortened position, which can cause them to become tight, says Sophia Solomon, M.D., a podiatrist in New York City. “When we stand up or go for a run following a full day of sitting, these tight muscles tug on our bones leading to inflammation and painful bone spurs,” she says.

    How to open it up: A targeted plantar fascia stretch can open up the connective tissue. Sit down, and place the foot across your knee. Using your hand on the same side, pull your toes back toward your shin until you feel a stretch in your arch. Run your thumb along your foot—you should feel tension. Hold for 10 seconds.

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    The best way to stretch the plantar fascia, though, isn’t really a stretch. Instead, roll your feet over mini foam rollers or a ball.

    You can also point and flex your foot against a resistance band.

    Headshot of Ashley Mateo
    Ashley Mateo
    Ashley Mateo is a writer, editor, and UESCA- and RRCA-certified running coach who has contributed to Runner’s World, Bicycling, Women's Health, Health, Shape, Self, and more. She’ll go anywhere in the world once—even if it’s just for a good story. Also into: good pizza, good beer, and good photos.