{"product_id":"book0021976","title":"A shortcut to becoming stronger, a martial art that uses mechanics to string","description":"\u003cdiv\u003eSingle (Softcover) Baseball Magazine Company \/ Martial arts rely on brute force... For those who think so: Why do Sumo wrestler  fight for mawashi? Why do boxers return knuckles to punch? Is running necessary for weight training to become stronger? How about ・・・・・・ punches are thrown with the feet and kicks with the head? We will unravel all the mysteries through biomechanics!\u003c\/div\u003e","brand":"闘道館","offers":[{"title":"Default Title","offer_id":40548093263944,"sku":null,"price":700.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/3938\/8744\/files\/K0000000044601_1792484554_0.jpg?v=1792484836","url":"https:\/\/tuudoukan.com\/en\/products\/book0021976","provider":"闘道館","version":"1.0","type":"link"}