.bs-table-wrap>div { width: 100% !important; max-width: none !important; display: block !important; } .bs-table-wrap table { width: 100% !important; max-width: none !important; } If you wake up stiff, sore, or restless, the problem may not be you. It may be your mattress. Learning how to choose mattress firmness is one of the most useful things you can do before buying a new bed, because the same mattress can feel perfect to one sleeper and miserable to another. There is no single best firmness for everyone. The right level depends on your age, how you sleep, how much you weigh, and any special needs such as pain, pregnancy, or sleeping hot. This guide walks through each factor in turn, so you can narrow your choice with confidence. Firmness vs. Support Firmness is how a mattress feels when you first lie down. Support is how well it keeps your spine in a neutral line through the night. A soft mattress can still be supportive, and a firm mattress can still be unsupportive if it pushes your hips or shoulders out of alignment. When you shop, look for a feel you like and a surface that keeps your body level. Mattress Firmness Explained There is no industry standard for firmness ratings. One brand's 6 can feel like another brand's 7. Treat the number as a starting point, and rely on trial periods and real customer feedback to confirm the feel. To keep things clear, here is how BedStory defines firmness. We rate every mattress on a scale of 1 to 10, where 1 is the softest and 10 is the firmest, and group the scale into five levels: Extra soft (1 to 2): you sink in deeply and the mattress cradles your whole body. Soft (3 to 4): plenty of give and a gentle hug, with a little more support underneath. Medium (5 to 6): a balance of contouring and push-back. This is the range most people end up happy with. Firm (7 to 8): you rest more on top of the surface, with little sinking. Extra firm (9 to 10): very little give, so your body stays on top of the surface with maximum push-back. Choosing Firmness by Age Our bodies, and our sleep needs, change over time. Here is a general guide. These are common patterns, not strict rules, so personal comfort always comes first. Age group Typical firmness range Key consideration Kids and teens Medium-firm (6 to 7) Spinal alignment during growth 20s to 30s Medium to medium-firm (5 to 7) Personal preference and activity level 40s to 50s Medium (5 to 6) Balance of pressure relief and support 60+ Medium to medium-firm (5 to 7) Joint comfort and ease of movement Kids and Teens: Medium Firm (6 to 7) Growing bodies do best on a mattress that is supportive without being harsh. A medium-firm surface helps keep the spine aligned while still giving enough cushioning for comfort. Avoid very soft mattresses for children, since sinking in too deeply can make good posture harder to maintain. Young Adults (20s to 30s): Medium to Medium Firm (5 to 7) At this stage, preference matters most. Most young adults sleep well on medium to medium-firm mattresses, which suit a wide range of sleep positions and body types. If you are active, a surface that supports your back while relieving pressure at the shoulders and hips is a good target. Adults in Their 40s and 50s: Medium (5 to 6) Many people begin to notice stiffness or aches in this stage of life. A medium mattress often strikes the best balance, with enough cushioning to ease pressure points and enough support to keep the spine aligned. If your current mattress is more than seven or eight years old, sagging may be part of the problem, so consider replacing it before changing firmness. Seniors (60+): Medium to Medium Firm (5 to 7) Older sleepers often benefit from a medium feel with good pressure relief for sensitive joints. Ease of movement matters too. A mattress that is too soft can make it harder to shift positions or get out of bed, while one that is too hard can be uncomfortable on the hips and shoulders. A medium to medium-firm mattress with a responsive top layer is a sensible place to start. Firmness by Sleep Position How you sleep changes where your body needs cushioning and where it needs support. Sleep position Recommended firmness What to watch for Side Soft to medium (3 to 6) Pressure at the shoulders and hips Back Medium to medium-firm (5 to 7) Support under the lower back Stomach Firm to extra firm (7 to 10) Hips sinking too deeply Combination Medium (5 to 6) Easy movement between positions Side Sleepers: Soft to Medium (3 to 6) Side sleeping puts concentrated pressure on the shoulders and hips. Soft to medium mattresses let those areas sink in slightly, which keeps your spine straight and relieves pressure. A surface that is too firm can leave you tossing and turning. Back Sleepers: Medium to Medium Firm (5 to 7) Back sleepers need support under the lower back so the spine keeps its natural curve. Medium to medium-firm mattresses usually work best, offering support without pushing the lower back out of position. Stomach Sleepers: Firm to Extra Firm (7 to 10) Stomach sleeping is the hardest on the spine, because the hips can sink too far and arch the lower back. A firmer mattress keeps the midsection from dipping, which helps hold your body in a more level line. Combination Sleepers: Medium (5 to 6) If you switch positions during the night, a medium feel is the safest choice. It is soft enough for side sleeping and supportive enough for your back. Look for a surface that responds quickly so you can move without feeling stuck. Firmness by Body Weight Body weight changes how deeply you sink into a mattress, so the same mattress can feel different depending on who is lying on it. The ranges below are rough guidelines. Weight range Recommended firmness Material consideration Under about 130 lbs Soft to medium (3 to 6) Responsive comfort layer for pressure relief About 130 to 230 lbs Medium to medium-firm (5 to 7) Balanced foam density Over about 230 lbs Medium-firm to firm (6 to 8) Dense, durable support core Lighter Sleepers (Under About 130 Pounds) Lighter sleepers do not compress the foam as much, so a mattress can feel firmer to them than the rating suggests. A softer mattress often feels right, since it lets the body sink in enough to relieve pressure. Average-Weight Sleepers (About 130 to 230 Pounds) Most people fall in this range, and medium to medium-firm mattresses are designed with them in mind. This is the sweet spot where most sleep positions are comfortable. Heavier Sleepers (Over About 230 Pounds) Heavier sleepers press deeper into a mattress, so a soft surface can sink too far and lose support. A firmer, denser mattress holds up better and resists sagging over time. Look for durable materials and a thick support core. How Weight and Sleep Position Interact Weight and position work together. A heavier side sleeper may need a medium-firm mattress to prevent sagging, while a lighter stomach sleeper may be comfortable on a medium surface. Start with your sleep position, then adjust one step softer or firmer based on your weight. Matching Firmness to Lifestyle and Sleep Problems Sometimes the right firmness depends less on who you are and more on what you are dealing with at night. Pregnancy As the body changes, comfort and support both matter. A medium mattress with good contouring can ease pressure on the hips and shoulders, especially for side sleepers. If you are pregnant and have specific concerns, ask your doctor for advice. Back, Hip, or Joint Pain and Waking Up Stiff If you wake up with aches, the mattress may be failing to keep your spine aligned. Medium to medium-firm mattresses are a common recommendation for people with back discomfort, since they combine support with some cushioning. If pain is persistent, speak with a healthcare professional rather than relying on a mattress change alone. Pressure Points in the Shoulders and Hips If you feel sore spots or numbness at the shoulders and hips, the surface may be too firm. A softer comfort layer lets those areas sink in and spreads your weight more evenly. Feeling Stuck or Sinking Too Deep If it feels like you are sinking into the mattress and struggling to change positions, the surface may be too soft or too slow to respond. A firmer, more responsive mattress makes movement easier and keeps the hips from dropping out of alignment. Hot Sleepers and Tossing and Turning Temperature affects sleep quality as much as firmness does. If you tend to overheat, foam type and breathability matter. A cooling memory foam mattress can combine the contouring comfort of memory foam with features designed to help manage heat, which may reduce restlessness caused by sleeping hot. Top pick COOLING COLLECTION Memory Foam Mattress Best for side sleepers and hot sleepers Gel memory foam cradles the shoulders and hips, while a cool-to-the-touch cover helps keep heat down. Shop COOLING COLLECTION Memory Foam → COOLING COLLECTION Hybrid Mattress Best for side sleepers who want more bounce Gel memory foam over pocketed coils adds pressure relief with extra airflow. Available in medium plush, plush, or ultra plush. Shop COOLING COLLECTION Hybrid →   Couples with Different Preferences When partners prefer different firmness levels, a medium mattress is the usual compromise. Good motion isolation also helps, so one person's movement does not disturb the other. Quick Checklist to Find Your Mattress Firmness Choosing firmness does not have to be complicated. Follow this simple order: Start with your age to get a general range. Narrow it by sleep position. Adjust one step softer or firmer based on your body weight. Fine-tune for personal needs such as pain, pregnancy, or sleeping hot. Common mismatches are easy to spot. If you wake up with sore shoulders, go softer. If your lower back aches or you sink too deep, go firmer. If you simply feel too warm, focus on cooling features before changing firmness. How to Test Your Choice Even with careful research, the real test is sleeping on the mattress. Look for a generous trial period and a clear return policy so you can try it at home. Give it time. New foam mattresses have a break-in period, and your body may need a few weeks to adjust, especially if your old mattress was worn out. Pay attention over the first 30 nights. Notice whether you wake up with aches, whether you feel too hot, and whether you can move easily. If problems persist after the adjustment period, use the trial to exchange or return it. Frequently Asked Questions What firmness is best for back pain? Most people with back discomfort do well on medium to medium-firm mattresses, which balance support and cushioning. If pain is ongoing, see a healthcare professional. Is a firm mattress better for your back? Not necessarily. A mattress that is too firm can create pressure points and fail to follow the natural curve of your spine. The goal is support that keeps your spine level, which is often a medium-firm feel rather than the firmest option. Does the best firmness change as you get older? It can. Many older adults prefer a medium feel with better pressure relief for joints and easier movement, while younger sleepers often prefer medium-firm. Body changes and sleep habits matter as much as age itself. What firmness is best for side sleepers? Soft to medium mattresses are usually best, because they let the shoulders and hips sink in slightly and keep the spine aligned. How long does it take to adjust to a new mattress? Many people need a few weeks, and some sources suggest up to 30 nights, to fully adjust to a new mattress. Use the trial period to decide. Conclusion The right firmness comes down to a few key factors: your age, your sleep position, your body weight, and your personal needs. Start with a medium to medium-firm range, then adjust based on how you sleep and what your body tells you.