The most effective legs kick way in swimming is make full use of all joints movement, legs kick through knee joint
flexion and extension has an advantage over straight legs kick, which is similar to arms stroke with elbow and wrist joint flexion better than straight arms stroke, normally when knee joint takes second extensions, maximum
propulsion force by legs kick in period can be recorded. With the increasing of swimming speed, it’s more effective
to make kick motions with decreased range and quicker kick frequency which can provide higher speed in mutual
action between feet and flow, reduce opposite direction resistance and legs recovery inertial force.
The most effective legs kick way in swimming is make full use of all joints movement, legs kick through knee jointflexion and extension has an advantage over straight legs kick, which is similar to arms stroke with elbow and wrist joint flexion better than straight arms stroke, normally when knee joint takes second extensions, maximumpropulsion force by legs kick in period can be recorded. With the increasing of swimming speed, it’s more effectiveto make kick motions with decreased range and quicker kick frequency which can provide higher speed in mutualaction between feet and flow, reduce opposite direction resistance and legs recovery inertial force.
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