Hitting lower target of 7,000 steps a day will deliver big health boost, study says
研究：日行7000步对健康大有好处

Reaching goal cuts mortality risk by almost half, says research that suggests popular 10,000-target is unscientific
最新研究显示，与每天步行2000步的人相比，每天步行7000步的全因死亡率降低47%，而1万步降低48%。