1.倒走:倒走能使全身的腰脊肌、膝关节周围的肌肉、韧带和股四头肌得到锻炼。2.献血:科研人员对荷兰西部2682名中年男子进行的一项调查研究发现,定期献血者发生急性心肌梗塞的几率比不献血者低86%。研究人员说,定期献血,可使体内储存的铁处于轻度偏低水平,而少量缺铁可有效防止 1. Back Walk: Back Walk can make the body’s lumbar spine, knee muscles around the ligaments and quadriceps get exercise. 2. Blood donation: A survey of 2682 middle-aged men in the western part of the Netherlands found that regular blood donors had a 86% lower risk of developing acute myocardial infarction than those who did not. Researchers said that regular blood donation, the body can store iron in the mild low level, and a small amount of iron can be effectively prevented