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Blog 2026/07/26 22:00 by SHU3

Is Just Sitting Deep Enough? Poor Sitting Posture as a Direct Cause of Lower Back Pain

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Most lower back pain caused by desk work stems from not sitting in the correct posture on an office chair or from poor posture habits. Conversely, this means that simply making an effort to improve your posture when sitting can help prevent and address chronic lower back pain. 【The Key is the "Pelvis"】 The pelvis is crucial for maintaining correct sitting posture. By sitting with your pelvis upright, your spine naturally forms an S-curve. Conversely, when your pelvis is tilted back in a "sleeping pelvis" position, even if you straighten your back, your spine will quickly curve again. When you lower your hips so that the chair's backrest aligns with a position slightly above your tailbone, your pelvis naturally becomes upright. 【Three Points for Correct Sitting Posture】 ① Sit deep in the chair ② Sit so that the soles of your feet are firmly on the floor ③ Sit with your shoulders relaxed These three points are the basics. Additionally, an elbow angle of approximately 90° is recommended, and if you can rest your elbows on armrests while working, you can reduce the strain on your upper body. 【Benefits of Changing Your Sitting Posture】 Improving how you sit in your chair distributes stress on your body and helps prevent shoulder stiffness and lower back pain. With reduced strain, it becomes easier to maintain concentration, leading to fewer careless mistakes and improved work quality. 【Summary】 When thinking about lower back pain prevention, people tend to think of "stretching," but simply reviewing your basic sitting posture can make a significant difference in strain. Starting today, try to be mindful of these three points: "sit deep, keep your pelvis upright, and maintain a 90-degree elbow angle."
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深く座るだけで大丈夫?座り方の乱れが腰痛の直接原因に

デスクワークが原因で起こる腰痛の多くは、正しい姿勢でオフィスチェアに座れていない、姿勢の悪さが起因しています。逆にいえば、座る際の姿勢改善に努めるだけでも、慢性的な腰痛の予防・対策が期待できるということです。 【カギは「骨盤」】 正しい座り姿勢で重要になるのは骨盤です。骨盤を立てて座ることで、背骨が自然なS字カーブを描けます。逆に骨盤が後ろに倒れた「骨盤が寝ている」状態では、背中だけを伸ばしても背骨はすぐに丸まってしまいます。 椅子の背もたれが尾てい骨のやや上部にあたる位置に腰を下ろすと、自然に骨盤が立った姿勢になります。 【正しい座り方、3つのポイント】 ①深く腰掛ける ②足の裏がしっかり床に着くように座る ③肩の力を抜いて座る この3点が基本です。また肘の角度は約90°が推奨されており、作業中に肘を肘置きに預けられれば、上半身にかかる負担を軽減できます。 【座り方を変えるだけで得られる効果】 椅子の座り方を改善すると、体への負担が分散されて肩こりや腰痛の予防になります。負担が少なくなることで集中力も持続しやすくなり、単純ミスの減少や業務の質の向上にもつながります。 【まとめ】 腰痛対策というと「ストレッチ」を思い浮かべがちですが、そもそもの座り方を見直すだけでも負担は大きく変わります。今日から「深く座る・骨盤を立てる・肘90度」の3点を意識してみてください。
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