体力活动是指任何一种运用肌肉产生能量消耗的人体活动,包括FITT四个参数:活动频率、活动强度、持续时间、活动种类。大规模研究已经证实:体力活动既是一项有效的肿瘤一级预防措施,也是一项有效的肿瘤三级预防措施。大量研究表明,增强体育锻炼可降低结直肠癌、食管腺癌、胃癌、乳腺癌、肺癌、胰腺癌的发病风险。美 Physical activity refers to any kind of human activity that exerts energy expenditure on muscles, including four parameters of FITT: frequency of activity, intensity of activity, duration, type of activity. Large-scale studies have confirmed: physical activity is both an effective first-line preventive measures of cancer, but also an effective third-level preventive measures of cancer. Numerous studies have shown that increased physical activity can reduce the risk of colorectal cancer, esophageal adenocarcinoma, gastric cancer, breast cancer, lung cancer and pancreatic cancer. nice