Download - Performance manager webinar november 2007
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The scientific inspiration for the Performance Manager concept
Andrew R. Coggan, Ph.D.
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The relationship between trainingand performance
Training loadAthlete
Performance
(“dose”) (↑ or ↓)
StimulusSystem
Response
(stress) (strain)
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Scientific studies using mathematical modeling to quantitatively relate training load to performance
• Approximately 30 English language papers• Many different sports studied (i.e., weightlifting,
hammer throwing, running, swimming, cycling, triathlon)
• Variety of mathematical approaches used (e.g., from simple regression to neural networking)
• Vast majority have relied upon Banister’s impulse-response model or some variation thereof.
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Impulse-response model of training adaptation
Banister et al., Aust J Sports Med 7:57, 1975
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Impulse-response model: effect of “square wave” increase in training load to 100 units/d
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Busso et al., J Appl Physiol 92:572, 2002
Prediction of training-induced changes in performance using impulse-response model
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Limitations to the impulse-response model
• Mathematically complex, yet overly simplified• Requires frequent, quantitative measurement of
performance (i.e., 20-200 times every 60-90 d)• Parameter estimates still may be insufficiently stable
(precise) to permit highly accurate prediction of future performance
• Inter-study and inter-subject variability in parameter estimates (esp. ka (k1) and kf (k2)) limits ability to apply
“generic” version of model
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Representative studies from the literature
Study SubjectsTraining program
τa (τ1) τf (τ2) ka (k1) kf (k2)
Busso et al., 1991
Initially untrained
men (n=8)
Constant-load
cycling
60 min/d, 4 d/wk, for
14 wk
38±9 2±2 0.048±0.019 0.117±0.114
Busso et al., 1997
Recreational cyclists (n=2)
Interval cycling 40-60 min/d, 3-5 d/wk
for 14 wk
60, 60 4, 6 0.0021, 0.0019
0.0078, 0.0073
Busso, 1993 Initially
untrained men (n=6)
Interval cycling 40-60 min/d for 15 wk
3 d/wk:
41±15
5 d/wk:
35±12
3 d/wk:
9±6
5 d/wk:
13±3
3 d/wk: 0.019±0.006
5 d/wk:
0.021±0.006
3 d/wk:
0.015±0.008
5 d/wk: 0.021±0.006
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Representative studies from the literature (con’t)
Study SubjectsTraining program
τa (τ1) τf (τ2) ka (k1) kf (k2)
Morton et al., 1990
Initially untrained
men (n=2)
Running 40-100 min/d, 7
d/wk, for 4 wk
40, 50 11, 11 1, 1 1.8, 2
Iñigo et al., 1996
National and international
level swimmers
(n=18)
Swimming 35-40
km/wk for 44 wk
41±4 12±6 0.062±0.04 0.128±0.055
Hellard et al., 2005
Olympic level swimmers
(n=7)
Swimming 45-50
km/wk for 4 y
50±8 19±8 0.01±0.01 0.05±0.03
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Limitations to the impulse-response model
• Mathematically complex, yet overly simplified• Requires frequent, quantitative measurement of
performance (i.e., 20-200 times every 60-90 d)• Parameter estimates still may be insufficiently stable
(precise) to permit highly accurate prediction of future performance
• Inter-study and inter-subject variability in parameter estimates (esp. ka (k1) and kf (k2)) limits ability to apply
“generic” version of model
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What is “form”?
Form = “fitness” plus “freshness”!
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Impulse-response model of training adaptation
Banister et al., Aust J Sports Med 7:57, 1975
Performance Manager
Coggan, 2004
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Performance Manager: result of “square wave” increase in training load to 100 TSS/d
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Uses for the Performance Manager
• Determining optimal long-term training load• Identifying periods of severe overreaching that may
lead to illness or overtraining• Identifying periods of “training stagnation”• Assuring that the progressive overload principle is
applied in a rationale manner• Planning a taper in an attempt to peak for a particular
event
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Performance Manager chartfor an elite track cyclist (2002 season)
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Performance Manager chartfor an elite track cyclist (2002 season) (con’t)
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Performance Manager chartfor an elite track cyclist (2007 season)
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Performance Manager chartfor an elite track cyclist (2007 season)
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Performance Manager chartfor an elite track cyclist (2007 season) (con’t)
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Performance versus TSB: effect of durationDuration of effort TSB for 2002 PB TSB for 2007 PB
5 s 35 26
10 s 35 16
20 s 35 5
30 s 35 17
1 min 34 17
2 min 34 5
5 min 33 8
5 min (normalized power) 34 0
10 min 6 19
10 min (normalized power) 5 2
20 min (-19) 19
20 min (normalized power) 34 17
30 min 6 19
30 min (normalized power) 34 19
60 min -10 19
60 min (normalized power) 34 19
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TSB at time of personal best for power(all durations)
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TSB at time of personal best for power(<5 min)
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TSB at time of personal best for power(>10 min)
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Caveats and limitations
• Accuracy of predictions depends upon:– Accuracy/completeness of underlying data– Use of appropriate time constants (esp. for ATL)
• “Composition” of the training load still matters• Training Manager helps you view the “forest”, but
you should never lose sight of the “trees”
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Additional resources
• www.cyclingpeakssoftware.com/power411/
performancemanagerscience.asp• www.cyclingpeakssoftware.com/power411/
performancemanager.asp• www.cyclingpeakssoftware.com/power411/
howtoperformancemanager.asp• www.cyclingpeakssoftware.com/support/
WKO+2_1_user_guide.pdf
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Special thanks to the “beta testers” of the Performance Manager
Hunter AllenTom AnhaltGavin AtkinsAndy BirkoLindsay EdwardsMark EwersSam CallanChris CleelandTony GellerDave HarrisDave JordaanKirby KriegerChris MerriamJim MillerChris Mayhew
Dave MartinScott MartinPhil McKnightRick MurphyTerry RitterBen SharpAlex SimmonsPhil SkibaRic SternBob TobinJohn VerheulFrank OvertonLynda WallenfellsMike Zagorski