As I was preparing a talk on body weight training for the knee today, I came across a new article in September edition of the Journal of Strength and Conditioning Research.  The article discusses the effects of  lower limb plyometric training on body composition, explosive strength and kicking speed.

In short, the authors looked at 20 elite female soccer players over a 12 week period.  Half of the players were assigned to a control group who did normal conditioning (including general strength training but no weights) on M,W and F, while the plyometric group did just the plyometrics on those same days.

Assessments were done 1 week prior to starting, 6 weeks in, 1 week after cessation and 5 weeks after the program is finished.  In summary the results for the plyometric group were:

  • No significant change in body composition
  • Players were able to increase explosive strength in 6 weeks
  • Kicking speed improved after 12 weeks of plyometric training
  • Players were able to maintain these gains for weeks after training ceased just with regular soccer training

I have long advocated soccer players do plyometrics on the field after the warm-up period to increase power and reduce injuries.  Now, it appears the increased explosive strength gains may be transferred to a sport specific skill in terms of kicking speed.

In the article the procedure utilized horizontal hurdle hops, depth jumps and horizontal jumps.  For coaches and players looking for a simple field routine, consider the following drills:

  1. Squat jumps – Squat down to load the muscles and then jump straight up and down continuously for maximal height.  Continue jumping in one smooth fluid motion for 10 repetitions focusing on soft landings and the knees staying in line with the knees and not caving inward.  Perform 1-2 sets.
  2. Split jumps – stand in the lunge position and then jump straight up and back down with maximal explosion.  Repeat 10 times with the left leg forward and then repeat with the right foot forward.  Do 1-2 sets.
  3. Consecutive broad jumps -perform 5 consecutive broad jumps for distance.  Rest 30-45 seconds and repeat 1-2 times.
  4. Power speed skater – drive off the left leg moving laterally and land on the right leg, then immediately drive off the right leg and land on the left leg.  Perform 1-2 sets 0f 10 repetitions continuously (back and forth = 1).

These four basic plyometric drills require no equipment and are very effective for improving performance.  Consistency is key to get the best results.  Blending the plyometrics with body weight and core strengthening will only serve to enhance the neuromuscular training effects in my opinion as well as to serve to prevent injuries.