Plyometric Training: Two-footed Landing Drop (Depth) Jump
The drop or depth jump is a ‘plyometric’ exercise. It’s designed like other similar dynamic exercises to boost the power output of your muscles (and in particular their fast twitch fibre). The exercise capitalises on the increased power that it is generated in our muscles when a lengthening (eccentric) muscular contraction, immediately proceeds a shortening (concentric) contraction in the same muscle group. It’s a bit like stretching a spring to its fullest length, then letting it go – immense amounts of energy will be released in the split second that the spring recoils. You get the same high powered response from your muscles when you land from the jump (the eccentric contraction) and spring upward (the concentric contraction).