最佳负载 meaning in English

optimum load

11 programs simulation , 5 kinds and heartbeat age optimal stress simulation setting , provide optimal pulmonary and cardiac sport mode
种程式模拟种及心跳年最佳负载模拟设定种，对心肺功能提供最佳的运动模式
11 programs simulation , 5 kinds and heartbeatage optimal stress simulation setting , provide optimal pulmonary and cardiac sport mode . touch type adjustment for trip load
１１种程式模拟５种及心跳年龄最佳负载模拟设定５种，对心肺功能提供最佳的运动模式