The following study examined whether a pre-season weight room emphasis on speed or load produced greater results. Interestingly, both groups produced very similar performance outcomes on short sprint tests, weight room, and jump tests. If anything, the power group produced slightly better (but non-significant) results on the short sprint (acceleration test measures). On the surface this may lead one to believe that speed and load emphasis are equivalent in training outcome but it’s important to remember that this was a short term study that doesn’t examine what happened during the season (maintenance period). My prior experience and well accepted coaching theory suggests that higher load focused strategies should be employed early to allow for somewhere to progress to. In other words, it is well recognized that:
- Variation alone can produce training adaptations
- Appropriate sequencing of training stimuli over a training year (the order of stimuli application matters)
- Anecdotal evidence suggests loading schemes that move downstream on the force-velocity over time are more successful
With these points in mind, and knowing that it will be difficult to incorporate, much less introduce, heavier loading in the gym while players are in season, I would suggest that further research is necessary on this topic with my current leaning being toward a greater emphasis towards greater loading (well beyond what was used in this study) and all that goes with it (joint health, enzymatic and cross sectional changes) in the off-season weight room sessions and a shift towards maintenance of those qualities during the season and a shift (although not steady / linear) towards lower load, higher velocity focused training while the players are in season.
J Strength Cond Res.?2012 Oct 18. [Epub ahead of print]
Different loading schemes in power training during the pre-season promote similar performance improvements in Brazilian elite soccer players.
1School of Physical Education and Sport, University of S?o Paulo, S?o Paulo, SP, Brazil 2Pablo de Olavide University, Faculty of Sport, Seville, Spain 3P?o de A??car Nucleus of High Performance in Sport, S?o Paulo, SP, Brazil.
ABSTRACT: The present study investigated the effects of two different power-training loading schemes in Brazilian elite soccer players. Thirty two players participated in the study. Maximum dynamic strength (1RM) was evaluated before (B), at mid-point (i.e. after three weeks) (T1), and after six weeks (T2) of a pre-season strength/power training.?Muscle?power, jumping, and sprinting performance were evaluated at B and T2. Players were randomly allocated into one of the two training groups: velocity-based (VEL: n=16; 19.18 ? 0.72 years; 173 ? 6 cm; 72.7 ? 5.8 kg) or intensity-based (INT: n=16; 19.11 ? 0.7 years; 172 ? 4.5 cm; 71.8 ? 4.6 kg). After the individual determination of the optimal power load, both groups completed a 3-week traditional strength-training period. Afterwards, the VEL group performed three weeks of power-oriented training with increasing velocity and decreasing intensity (from 60 to 30% 1RM) throughout the training period whereas the INT group increased the training intensity (from 30 to 60% 1RM) and thus decreased movement velocity throughout the power-oriented training period. Both groups utilized loads within ? 15% (ranging from 30 to 60% 1RM) of the measured optimal power load (i.e. 45.2 ? 3.0% 1RM). Similar 1RM gains were observed in both groups at T1 (VEL: 9.2%; INT: 11.0%) and T2 (VEL: 19.8%; INT: 22.1%). The two groups also presented significant improvements (within-group comparisons) in all of the variables. However, no between-group differences were detected. Mean power in the back squat (VEL: 18.5%; INT: 20.4%) and mean propulsive power in the jump squat (VEL: 29.1%; INT: 31.0%) were similarly improved at T2. The 10-m sprint (VEL: -4.3%; INT: -1.6%), the jump squat (VEL: 7.1%; INT: 4.5%), and the counter movement jump (VEL: 6.7%; INT: 6.9%) were also improved in both groups at T2. Curiously, the 30-m sprint time (VEL: -0.8%; INT: -0.1%) did not significantly improve for both groups. In summary, our data suggest that male professional soccer players can achieve improvements in strength and power-related abilities as a result of 6 weeks of power-oriented training during the pre-season. Furthermore, similar performance improvements are observed when training intensity manipulation occurs around only a small range within the optimal power training load.
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1) In my experience (playing professional soccer in Brazil), nearly 0 Brazilian professional players have any resistance training history. The training that is imposed even at the biggest and most successful clubs is very archaeic (machine based training). This may count for the progressions accross the board, except…
2) I am also curious about why the 30m sprint time did not improve. If 10m sprint, squat jump, and 10m sprint improved, is there just a fatigue component that kept the 30m sprint from decreasing?
I found the 30m time results curious too. I’ve seen 0-10m, 10m-20m times improve from weight training but 20-30m split times not improve but I’ve never seen 0-30m time not improve if the other segments did.
One thing I have noticed is higher velocity sprinting IS much more sensitive to fatigue than acceleration capacities so your point could be valid.