30m Crouch Start. 100m Crouch Start. # of Steps
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1 Approach Run PRECEPTS RALPH LINDEMAN Head Men s and Women s Track & Field Coach US Air Force Academy Coaching Staff, USA Men s Team, 2004 Olympic Games, Athens, Greece Coaching Staff, USA Men s Team, 2007 World Championships, Osaka, Japan FlyFishing Analogy Upstream Downstream Downstream Upstream Upstream Downstream Upstream Downstream Why is the Approach Run so important in the Long Jump? Single most important factor determining the distance of the jump is horizontal velocity at take-off off! Parabolic flight of the jumper s center of mass is determined at the moment of take-off. 1
2 Why is the Approach Run so important in the Triple Jump? Single most important factor in determining the distance of the jump is horizontal velocity at take-off; Ability to minimize the loss of that horizontal velocity through two landings determines the sum distance of the triple jump. Why is the Approach Run so important in the Pole Vault? Increase in approach run velocity (Kinetic Energy) will result in an increase in gravitational potential energy stored in the pole and a corresponding increase in vault height. Research shows that an increase in velocity of 1 meter/second results in an increase of approx. 0.5m in vault height. POLE VAULT: Velocity Required for Height Attainment Bar Clearance Height Velocity Required 5.80m (19 0 ) 9.1 m/s 5.50m (18 0 ) 8.7 m/s 5.20m (17 0 ) 8.4 m/s 4.90m (16 0 ) 8.1 m/s 4.60m (15 0 ) 7.8 m/s 4.30m (14 0 ) 7.5 m/s 4.00m (13 0 ) 7.2 m/s 3.70m (12 0 ) 6.9 m/s Interpolated from Data From Studies by Dr Peter McGinnis, Jan
3 OBJECTIVES of the Approach Run 1. Achieve Optimal velocity. 2. Acceleration t-h-r-u take-off (Perceived). 3. Get jumper to (precise precise) optimal take-off spot 4. Execute a Vertical impulse at take-off (to achieve effective take-off vector) MAXIMUM CONTROLLABLE VELOCITY vs. OPTIMAL VELOCITY Establishing the Run Establish the approach run on the track! (with no markers!) Never run it back 3
4 Length of the Run Relationship between a) Number of strides & b) Measured distance of the approach run Length of the Run RULES Establish a minimal # of strides which gets the jumper to Optimal velocity. The faster the athlete s track speed, the longer it will take them to get to Optimal velocity. Length of the Run Relationship between Approach Velocity & # of Steps (NOT necessarily early season) 30m Crouch Start 100m Crouch Start # of Steps
5 Length of the Run RULES Length of the Run (# of Strides) needs to be increased as the Jumper s Maximum Velocity increases. Do NOT increase the length of your jumper s run until they are ready to exploit their increased velocity with effective take-off technique! Initiating the Run (overcoming Inertia) No hops, no skips Every approach run (drills, short run, full run) must start the same way Initiating the Run (overcoming Inertia while holding Pole) With (take-off) foot in contact with the runway, rock back to the heel of the take-off foot; Take a short step back with the other foot; 5
6 Initiating the Run (Overcoming Inertia) Slight lean forward to give horizontal displacement to COM Begin to power down the runway Rhythm of the Run S-m-o-o-t-h acceleration pattern (velocity curve) Short Strides Longer Strides Slow Fast Faster Faster yet SPRINT MECHANICS Two (2) Factors Affect Sprint Velocity 1. Stride Length 2. Stride Frequency 6
7 What happens to Stride Length when the jumper decelerates? It increases SPRINT PHASES (of the Approach Run) 1. Drive Phase 2. Preparation for Take-off DRIVE PHASE (of the Approach Run) Same mechanics as the sprinter; Not same acceleration rate as the sprinter; Phase is shorter distance / shorter duration than the sprinter s Drive Phase, i.e., reached in 25-35m ( ). 7
8 DRIVE PHASE (of the Approach Run) Back-side Mechanics Predominate Power from the extensors of hip and knee; ;( (near) full extension of hip/knee/ankle Knee drives forward & upward-- applies force down & back Ground contact is made slightly behind the COM SPRINT PHASES (of the Approach Run) 1. Drive Phase 2. Preparation for Take-off PREPARATION FOR TAKE-OFF (during the Approach Run) Begins when jumper reaches Optimal velocity Lasts just a few strides (includes penultimate stride and plant) In the vault, includes the pole plant from start to finish. 8
9 PREPARATION FOR TAKE-OFF (during the Approach Run) Front-side Mechanics begin to pre-dominate; Power from hip flexors and hamstrings Foot touches down slightly ahead of COM Active landings-- feel the runway Ground contact times decrease Posture becomes more upright ( running tall ) Progression of body angle with surface Heel recovery is higher (foot passes above opposite knee) POSTURE (ramifications for pole vault) In the pole vault, the mass of the pole is a factor in maintaining Postural Integrity POLE CARRY MECHANICS (during Preparation for Take-off) Pole tip starts HIGH. G-r-a-d-u-a-l and ACTIVE pole drop over entire course of the Approach Run As the vaulter runs faster, the pole tip drops faster! 9
10 POLE CARRY MECHANICS (during Preparation for Take-off off) The lowering of the pole tip over the final few strides increases gravitational pull on the extended pole and actually forces the vaulter to increase their cadence and accelerate into the take-off POLE CARRY MECHANICS (Common Mistakes) Premature pole drop carrying (instead of pushing ) the pole arching the back to counteract gravity force on pole Feet land ahead of COM Braking forces Deceleration POLE CARRY MECHANICS Late pole drop (Common Mistakes) Rush to get the pole planted in the box Deceleration 10
11 POSTURE (during Preparation for Take-off off) Head up (Neutral Head position) Chest up Hips underneath (Neutral Pelvic position) Knees up High heel recovery FOCAL POINTS During the Drive Phase -- Focus is on the take-off board! During Preparation for Take-off off Focus is out the back of the pit ( pick a spot to focus on) except FOCAL POINTS except the Pole Vault! 11
12 PREPARATION FOR TAKE-OFF What happens on Penultimate Stride? 2 nd to last (penultimate) stride is slightly longer lowers the COM Heel-to-toe toe foot plant and toe-offoff Last stride is slightly shorter catches the COM on the the rise. PREPARATION FOR TAKE-OFF ( Penultimate Stride) Next-to-last stride is (example from Long Jump) METHODS OF TEACHING PENULTIMATE STRIDE TECHNIQUE Flat foot landing on penultimate stride, Flat foot landing on final stride Tom Tellez Push-pull-plant plant (with take-off leg) from 2 nd -to-last stride Randy Huntington 12
13 HOW CAN THE JUMPER PRACTICE PENULTIMATE STRIDE TECHNIQUE? Long Jump take-off drills from box Basketball lay-up drills Hurdles Gallop drills PLANT What happens at the Plant Quick last stride! Gallop ~Cliff Rovelto Get on your take-off leg as fast as possible! ~Joe Walker ACCELERATION T-H-R-U the TAKE-OFF 13
14 ACCELERATION THROUGH TAKE-OFF Competitor Best Ht Velocity 15-10m Velocity 10-5m ΔV J Hartwig 5.84m 9.09 m/s 9.45 m/s +.36 T Mack 5.74m 8.96 m/s 9.09 m/s +.13 N Hysong 5.74m 9.02 m/s 9.09 m/s +.07 T Stevenson 5.74m 9.06 m/s 9.23 m/s +.17 D Miles 5.74m 8.92 m/s 9.16 m/s +.24 From Data compiled by Dr Peter McGinnis, Men s Pole Vault Final USA Track & Field Championships, June 22, 2002, Stanford, CA Common Causes of DECELERATION at Take-off Approach run may be too long; Optimal (Maximum controllable) velocity is reached to early in the run; Focus on the board can transmit mixed signals and results in excessive steering (chopping, reaching strides) Ineffective plant technique disrupts efficient sprint mechanics WHAT HAPPENS AT TAKE-OFF? 1. Horizontal momentum from approach run and 2. Vertical impulse applied at take-off together result in the Take-off Vector. Vector 14
15 VERTICAL IMPULSE AT TAKE-OFF (To Achieve Effective Take-off Vector) (example from Long Jump) * KNEE DRIVE FORWARD & UPWARD * VERTICAL IMPULSE AT TAKE-OFF (To Achieve Effective Take-off Vector) Effective Take-off Vector is a result of (a) vertical impulse at take-off and (b) horizontal momentum generated from the approach run. APPROACH RUN Length Management Methods Start Mark (only Checkmark Systems only mark the jumper/vaulter is aware of) Teammate Mark (monitors 1 Mid-mark (4 Take-off (monitors 1 st 4 steps of drive phase) (4-6 steps out from take-off) off (not a physical mark) 15
16 APPROACH RUN Length Management Methods Value of Mid-mark Provides confirmation of chopping, or, more commonly, reaching during final steps Provides confirmation of deceleration over the final steps of the approach run Allows coach to focus on the jump (rather than foot placement at take-off) APPROACH RUN Length Management Methods Steering Early visual pick-up of the target (box or board) allows for more subtle stride length changes during the steering phase. Steering ability is trainable Jumping/vaulting from variable run lengths hurdling with variable spacing APPROACH RUN Length Management Methods Start Mark Adustments Feedback from previous approaches Wind, runway surface Confidence, Motivation, Arousal Feel 16
17 APPROACH RUN Length Management Methods Counting Strides ( Left s for left foot T-O) Gives jumper rhythmic feedback Helps identify phases of the approach run QUESTIONS? RALPH LINDEMAN Head Men s and Women s Track & Field Coach U.S AIR FORCE ACADEMY Office Phone: (719) 333 Office Phone: (719) ralph.lindeman@usafa.edu 17
18 Purpose of SPEED DEVELOPMENT DRILLS Affect Stride Length Backside mechanics (i.e., pushing down the runway) (Near) full extension of hip/knee/ankle Affect Stride Frequency Frontside mechanics [i.e., driving knee forward, generating negative foot speed (whip action of foreleg)] Affect Acceleration thru Take-off Progression of SPEED DEVELOPMENT DRILLS Mach Drills A-march A-skip Double A s Continuous A s Progression of SPEED DEVELOPMENT DRILLS Drills for Front-side/Back-Side Mechanics A-Bounds Speed Bounds Speed Bounds w/pole Speed Bounds w/thigh weights Speed Bounds w/pole w/thigh weights 18
19 Progression of SPEED DEVELOPMENT DRILLS Drills for Acceleration thru Take-off 2-step Take-off Drill Run-Run Run-Run-Bound w/pole Plant Sprint to Rope Plant Speed Bounds to Rope Plant SPEED DEVELOPMENT Physiological Basis OBJECTIVE Train the Energy System used in the Approach Run SPEED DEVELOPMENT Physiological Basis What Energy System is used in the Approach Run? Anaerobic/AlacticAlactic Energy System 19
20 SPEED DEVELOPMENT Physiological Basis Most Effective Method of Training the Anaerobic / Alactic Energy System: -Near-maximal velocity sprints -3-8 seconds duration - Near full recovery, i.e., 1-3 SPEED DEVELOPMENT Physiological Basis Why would we want to incorporate longer sprints (120 s, 150 s, 200 s) into jumper s training? Speed endurance work improves efficiency of metabolic system, reducing recovery time between vaults; Longer sprints allow more conscious attention to developing efficient sprinting mechanics; Improves general fitness energy energy efficiency, weight management, etc. Improves cardiovascular efficiency thru increased capillarization SPEED DEVELOPMENT Methods Acceleration Sprints 10-40m from standing start Vaulter-- both with and without pole 1 3 recovery meters per session 20
21 SPEED DEVELOPMENT Methods Speed Development Repetitions flying sprints of 30-60m w/1-3 seconds at maximum velocity Vaulter both with and without pole 4 6 recovery meters per session SPEED DEVELOPMENT Methods Speed Endurance Repetitions m 3-5 recovery m meters per session SPEED DEVELOPMENT (Other Methods) Resisted-Sprinting (<10% loss in velocity) (Slight) uphill sprints Sled-pulling Parachute-resisted resisted sprints 21
22 SPEED DEVELOPMENT (Other Methods) Assisted-Sprinting (<10% gain in velocity) (Slight) downhill sprints Wind-aided sprints (for the vaulter, sprints w/o the pole are actually assisted sprints!) SPEED DEVELOPMENT NEUROMUSCULAR BASIS When in the training cycle does the jumper work on speed development? Throughout the macrocycle (training year)! Frequently in each mesocycle (training phase) At least once in each microcycle (weekly plan) At the beginning of a training session, i.e., immediately after the warm-up SPEED DEVELOPMENT NEUROMUSCULAR BASIS Fatigue cannot not be allowed to become a factor in speed development training 22
23 SPEED DEVELOPMENT NEUROMUSCULAR BASIS Although physiological recovery is immediate (i.e., just a few minutes), neuromuscular recovery takes 48 hours (or longer) When you re green, You re growing. When you re ripe, You re rotten. 23
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