The strength measured using a back dynamometer is generally called back strength. The value measured by a back dynamometer is a combination of the strength of the muscles in the back of the trunk, centered on the latissimus dorsi, and the muscles in the lower back and buttocks. In order to obtain an appropriate value, it is important to follow the procedure of not bending the knees, straightening the back, leaning forward at a 30 degree angle, gradually applying force vertically upward, and pulling to the maximum strength. Back strength, along with grip strength, is considered one of the representative values of muscle strength in the body, and it increases with growth. In addition, back strength is important for humans to maintain an upright posture on two legs, but it is also necessary to have a good balance with the abdominal muscles during exercise. The back strength of an average adult male is around 150 kilograms, but for excellent athletes (wrestlers, weightlifters, etc.), it is 200 to 300 kilograms. [Ono Mitsutsugu] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
背筋力計を使って測定した力を一般に背筋力とよんでいる。背筋力計によって測定される値は、体幹背部にある広背筋を中心とした筋群、および腰部や殿部の筋力が総合されたものである。測定される値を適正なものとするためには、膝(ひざ)を曲げない、背筋(せすじ)を伸ばす、腰の前傾角度を30度にして鉛直上方に徐々に力を入れ、最大の力まで引くなどの方法を守ることがたいせつである。背筋力は、握力とともに、体の筋力を示す代表値の一つとして考えられており、成長に伴って大きな値を示すようになる。また、背筋力は、人間が二足直立姿勢を保つうえではたいせつなものであるが、さらに運動時などでは腹筋とうまくバランスのとれていることも必要となる。一般成人男子の背筋力は150キログラム前後であるが、優れた運動選手(レスリングやウエイトリフティングなど)では200~300キログラムとなる。 [小野三嗣] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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