百科页面 'Comparing Various Kinds of Exercise Machines: which is Best For You?' 删除后无法恢复,是否继续?
Modification: Anyone who finds this exercise too troublesome can keep the bottom knee slightly bent and on the bottom. Modification: A person can make the exercise less challenging by bending the knees barely and conserving them on the ground. A NordicTrack ski machine takes the common individual some time to study
百科页面 'Comparing Various Kinds of Exercise Machines: which is Best For You?' 删除后无法恢复,是否继续?