So I consulted biomechanics experts to find out how much slower it is to run on cinders than synthetic tracks, and their consensus that it's one and a half percent slower.
所以我请求生物力学专家 找出在煤渣上跑步要比塑胶跑道 多耗费多少能量， 他们的一致意见是会慢一点五个百分点。