Monday, July 30, 2012

SELECTING STARTING POINTS THROUGH TESTING

In my last blog I mentioned I would cover some circuit exercises for throwers as well as selection of testing methods for performance indicators for all athletes. It is best to test all the athletes prior to the start of training because their nervous systems will be fresh. This is important because most explosive strength and power levels will lag behind the training methods that are used to improve them. This is a phenomenon that sometimes develops a negative attitude towards training as athletes assume that, since they are training to improve their power and explosive strength, they will continue to see their test indicators go up. Endurance and Speed indicators can, and should, improve during the Fall, whereas Power and Explosive Strength will tend to go down or stagnate. This is due to the residual fatigue of the nervous system from the training methods used for their development.an Once the proper recovery intervals and reduction of volume is introduced, athletes and coaches can expect to see improvements in Power and Explosive Power Test results. Tests that prove to be great indicators of the Bio-Motor Abilities appropriate to all the strength/power/speed events (sprints, hurdles, jumps and throws) would include: 30m Sprint from standing or 3 pt. start, 30m Sprint w/Fly-in, 150m T.T. from standing start, Vertical Jump or Standing Long Jump, Counter Movement Jump, 5 second and 15 second Reactive Jumps. Obviously, there are some that are more appropriate for certain event groups. Throwers would not need a 150m T.T. but would benefit from improvements in starting speed (30m sprint from stand or 3 pt. start) and maximum speed (Flying 30m sprint). In addition, throwers would benefit from the longer Explosive Strength Endurance test involving Reactive Jumps over a the 15 second time test. However, all the tests would be beneficial for sprinters, hurdlers and jumpers. Use of the Vertical Jump, rather than the Standing Long Jump, can be more accurate as Vertical Jump testing is much easier for the athletes in all events to perform as has far fewer skill variables that go wrong. Once athletes have been tested, it should be easy to see the strengths and weaknesses of each athlete. This also gives each athlete a starting point and provides motivation to attack training in order to improve performances on the next testing period. Also, these tests can provide coaches with a good guide to planning training. As it has been said, “If you can’t test it, don’t train it!” Training methods designed to produce positive adaptations in Strength (Absolute Strength/Elastic Strength/Strength Endurance/Explosive Strength/Explosive Strength Endurance), Speed, Power, Speed Endurance, and Postural and Core Strength can be planned according to the specific needs of each athlete as determined by their testing results. Imbalances in strength should also be addressed in the Fall training period. Without fail, attention to teaching proper activation and development of the glutes will prove highly beneficial. Plans that contain Squats, Lunges, S.L. Squats, Split Squats, Hip Extension exercises, and Bridge exercises emphasizing glute activation and development are appropriate ways improving glute balance and strength necessary for proper performance of all the speed and power events. Throwers, (especially in high school where the implements are not as heavy as college) can gain great benefit from the same type of training as that for sprinters/jumpers with few variations. Strength work in the weight room might include more specific upper body lifts in addition to the Squats, Cleans/Pulls, Deadlifts and box hops that should be done by the sprint/hurdle/ jump athletes. Explosive Power through Med Ball Multi-Throw and Multi-Jump/Throw exercises should be implemented for all event groups with specific event Multi-Throw/Jump exercises determined by event group. For instance, throwers would benefit from South African Med Ball Push Tosses while sprinters/hurdlers and jumpers would benefit more from Over-Head Soccer Push Tosses . Regardless of event, all athletes need guidance on proper posture. Use of backpacks, constant texting, poor sitting mechanics, etc. can predispose athletes to postural strength deficiencies that can lead to injury and /or result in poor event mechanics due to inability to maintain proper posture. I would highly recommend that coaches read “The New Rules of Posture” by Mary Bond (Healing Arts Press, 2007). As advertised, this book is a great guide on how to Sit, Stand and Move in the Modern World. I can promise that improvements and emphasis on posture will produce improvements in all the event areas. In closing, I would suggest coaches looking for great drills and exercises for throwers to access the videos of Werner Gunthor that appear in the Video Clips section in the left column of this blog page. Great stuff. More on Fall training in the next blog. Enjoy the Olympics.

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THE ROLE OF STRENGTH/POWER TRAINING IN SPRINT ACCELERATION

THE ROLE OF STRENGTH/POWER TRAINING

IN SPRINT ACCELERATION: PART ONE


In order for successful acceleration mechanics to be performed, the sprinter must execute a technically efficient and powerful start, so as to allow for the optimal body lean and posture necessary for a sound entry into the acceleration phase.

The role of Strength/Power Training in all phases of the sprint race cannot be underestimated. Any discussion of Acceleration Mechanics specific to teaching sprinters to properly execute the Acceleration Phase of the sprint race must take into account the relationship between proper mechanics and the strength/power required to do so.

In “The Mechanics of Sprinting and Hurdling” (Dr. R. Mann, self published, 2007), Dr. Ralph Mann points out several elemental relationships between strength and the ability to be more mechanically efficient or productive in the various areas/phases of the sprint race.

Dr. Mann cites three specific examples of this Strength/Mechanical Efficiency relationship affecting a proper Sprint Start and the ability to perform a successful acceleration phase.

1) Greater strength allows for the athlete to produce greater horizontal forces in the Start (pg. 52).

2) Greater horizontal force produced at the Start allows for the sprinter to stay lower at the Start (pg.52).

3) Success in the short sprint race is determined by the ability of the sprinter to generate great amounts of explosive strength at the proper time. (pg. 91).

Mann’s analysis of sprinters found that weaker athletes tend to “pop up” during the Start because lesser amounts of horizontal force produced at the Start creates the need for the athlete to move the center of gravity vertically in order to maintain balance.

Given the need for the “falling or leaning” body position to properly execute a successful acceleration phase, block start mechanics must be incorporated into the drills used in teaching proper acceleration mechanics.

Glen Mills, coach of Usain Bolt and many world-class sprinters, alluded to the role of strength in the acceleration phase (termed Drive by many coaches) in an interview where he echoed the statements by Dr. Mann; “…the athlete has to stay in the crouch position while developing maximum power. If the athlete does not have the strength to carry the drive phase long enough then it has to be aborted so he can go into the transition earlier.”

Incorporation of relevant MAXIMUM STRENGTH (also termed Static), EXPLOSIVE STRENGTH (also termed Dynamic) AND ELASTIC STRENGTH development exercises into the overall sprint-training program cannot be argued in view of the proven interdependence between Strength and the ability to optimally perform the proven principals of Sprint Mechanics in all phases of the short sprint race.

Since Part 4 of this Acceleration Article will deal with Elastic Strength (or Plyometric Training), this section will focus on Maximum Strength and Explosive Strength Training exercises proven to be relevant to proper execution of Start, Acceleration and Maximum Velocity phases of the sprint race.

Both Maximum Strength and Explosive Strength exercises must be used in order to address both Intramuscular and Intermuscular coordination factors. Through the proper mixing of Maximum and Explosive Strength exercises, Recruitment, Rate Coding and Synchronization can be optimally developed through use of exercises that coordinate the amount of force, speed of movement and precision of movement patterns applicable to effective sprint mechanics. Use of exercises that cover the entire Force-Velocity Curve, with an emphasis on moving the curve to left over time, cannot be done with a proper mix of Maximum, Explosive and Elastic Strength exercises.

There seems to be a considerable amount of confusion among coaches about the need for Maximum Strength exercises to be included with Explosive Strength exercises in the training of sprinters. The idea that lifting heavy loads in a relatively slow manner is of no use to the high speed movements of sprinters needs to revisited in light of the specific research findings provided in “Strength and Power in Sport”, (P.V. Komi, IOC Medical Commission, 1992). Some of these specific findings are listed below.

1) High threshold Fast Twitch Glycolytic (FTb) Muscle Units are NOT recruited UNTIL force exceeds 90% of Maximum Strength (pg. 250).

2) Training with high velocity movements increases high velocity strength (pg. 263).

3) The load to be overcome and the movement time are the main factors in developing Rate of Force Development. If the load to be overcome is light, IRFD (Initial Rate of Force Development) predominates. If the load to be overcome is high, then MRFD (Maximum Rate of Force Dev.) predominates. For movements with a duration of 250ms or less (sprinting), BOTH IRFD and MRFD are the main factors (pg. 381).

4) Maximal Strength and Power are not distinct entities. Maximum Strength is the basic quality that influences power performance (pg. 383).

5) Improvements in Power have been shown to result from high intensity strength training, jump training under increased stretching loads and movement specific exercises requiring muscular coordination training (pg. 384, 385).

6) The use of training methods involving, maximal and near maximal contractions, cause a remarkable increase in RFD accompanied by an increase in movement speed (pg. 392).

7) RFD directed training should take precedence in the Preparation Phases but not be completely eliminated at any time of the training year (pg. 392).


Understanding the neural adaptations to the various strength training methods will allow for an intelligent selection of specific exercises and their proper integration into the overall training plan of each individual.

Strength/Power Training Plans must address the training age of the individuals within the sprint group. Beginning/Novice sprinters require different considerations than Intermediate and Advanced athletes. For example, research shows that Maximum Strength increases will also lead to increases in Power and the ability to generate force at fast speeds, especially in less experienced athletes. Training plans for Beginning/Novice athletes should contain more emphasis on Maximum Strength development and the teaching of proper lifting mechanics.

PART TWO: IN FUTURE POSTING