an energy systems primer midwest performance enhancement seminar 2011
TRANSCRIPT
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Midwest Performance Enhancement Seminar 2011
An Energy Systems Primer
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Midwest Performance Enhancement Seminar 2011
Thank You
Thanks to Perform Better and EliteFTS
Thanks to the other speakers
Thanks to the IFAST Staff
Thanks to you
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Midwest Performance Enhancement Seminar 2011
Objectives
• Understand the interaction of energy systems• Identify the difference between athletes’
needs in regard to energy production• Understand implications for training
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Midwest Performance Enhancement Seminar 2011
Essential Resources
• Adaptation in Sports Training by Viru• Ultimate MMA Conditioning by Jamieson• Exercise Metabolism by Hargreaves/Spriet• Block Periodization by Issurin• Time-motion research• Repeated-sprint ability research
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Midwest Performance Enhancement Seminar 2011
How do you train a guy for a 10 minute round in MMA?
“You have to do 10 minutes of shit.”-Joel Jamieson, MMA Conditioning Expert
Author, Ultimate MMA Conditioning
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Midwest Performance Enhancement Seminar 2011
Energy Systems
• ATP-CP/Phosphagen (alactic)– Immediate energy
• Glycolytic (lactic)– Intermediate energy
• Oxidative (aerobic)– Long term energy
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Midwest Performance Enhancement Seminar 2011
Contribution by sport
1998 ATP/CP Glycolytic Oxidative
Basketball 60 20 20
Hockey 50 20 30
Soccer 50 20 30
50 Freestyle 40 55 5
1974 ATP/CP Glycolytic Oxidative
Basketball 80 15 5
Hockey 80 20 0
Soccer 60 20 20
50 Freestyle 95 5 0
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Midwest Performance Enhancement Seminar 2011
Energy Systems
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Midwest Performance Enhancement Seminar 2011
Energy Systems
• ATP-CP
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Midwest Performance Enhancement Seminar 2011
ATP-CP
• No good evidence that training will increase ATP or CP stores in muscles
• 6 second all-out sprint can reduce CP stores up to 55%• Rate of CP driven ATP production decreases when CP is
reduced• Greater reduction of CP in fast-twitch fibers• High power activities may create a “CP deficit” that will
affect repeat performance even before CP is exhausted• Without the contribution of ATP from other sources, CP
stores could be exhausted in ~10 seconds
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Midwest Performance Enhancement Seminar 2011
Energy Systems
• Glycolysis
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Midwest Performance Enhancement Seminar 2011
Glycolysis
• Increases in ADP/AMP activate glycolytic enzymes to break down glycogen
• At higher intensities, Glycolytic activity increases resulting in high levels of lactate and H+
• Increased concentration of strong ions (H+, Na+, Cl-, and Pi) at high intensities interfere with muscle contraction
• In a 30 second sprint, glycolysis and CP provide equal amounts of energy
• Repeated, high-intensity efforts rely less on glycolytic energy production
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Midwest Performance Enhancement Seminar 2011
Glycolysis and ATP-CP
6 second sprints on 30 seconds rest
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Midwest Performance Enhancement Seminar 2011
Gylcolysis and ATP-CP
3 – 30 second sprints with 4 minute rest
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Midwest Performance Enhancement Seminar 2011
Energy Systems
• Beta oxidation/Kreb’s Cycle
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Midwest Performance Enhancement Seminar 2011
Oxidative Metabolism
• Huge potential for improvement (~240%)• The faster it turns on, the less anaerobic energy
is required• May contribute as much as 13% of energy
production in a 10 second sprint and 27% in a 20 second sprint
• With repeated, high intensity efforts, oxidative metabolism is primarily responsible for ATP regeneration
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Midwest Performance Enhancement Seminar 2011
Influence of Duration
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Midwest Performance Enhancement Seminar 2011
Oxidative Metabolism
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Midwest Performance Enhancement Seminar 2011
Energy System Review
• All energy systems are working all the time• ATP-CP and glycolysis contribute equally in the
early stages of maximal efforts• Oxidative metabolism contributes earlier and to
a greater degree than we once thought• With repeated, high intensity efforts, end
products of glycolysis inhibit ATP production from glycolytic metabolism and oxidative takes a dominant role.
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Midwest Performance Enhancement Seminar 2011
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Midwest Performance Enhancement Seminar 2011
Intermittant Sprint Exercise
• Intermittent Sprint Exercise– Short sprint/high intensity activity ≤ 10 sec– Long duration of rest period (60s to 5 minutes)– Near full recovery– Little to no decrement in performance– Singular events
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Midwest Performance Enhancement Seminar 2011
Intermittant Sprint Exercise
• Limiting Factors– Slow rate of CP breakdown– Slow rate of anaerobic glycolysis– Alactic capacity/Glycolytic capacity depending on
duration of the sprint
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Midwest Performance Enhancement Seminar 2011
Intermittent Sprint Exercise
• Strategies– Alactic power development– Glycolytic power development– Alactic/Glycolytic capacity development
depending on duration of sprint– Maximum effort strength/power training– Aerobic development via tempo training (Charlie
Francis style)
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Midwest Performance Enhancement Seminar 2011
Repeated-Sprint Exercise
• Repeated-Sprint Exercise (AKA, RSA)– Short sprint/high intensity activity ≤ 10 sec– Shorter rest period (≤ 60 sec)– Inability to achieve full recovery– Almost always a performance decrement– Typical of most team/field sports
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Midwest Performance Enhancement Seminar 2011
Intermittant vs. Repeated
4 second sprints on either 2 minute or 30 second rest periods
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Midwest Performance Enhancement Seminar 2011
Time Motion Study - Soccer
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Midwest Performance Enhancement Seminar 2011
Time Motion Study - Rugby
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Midwest Performance Enhancement Seminar 2011
Time Motion Study - Hurling
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Midwest Performance Enhancement Seminar 2011
Repeated-Sprint Exercise
• Limiting Factors– First sprint performance– Limited rest period/recovery time– Power recovery is directly correlated to CP
resynthesis– Accumulation of H+ and Pi– Decline of anaerobic glycolysis– Rate and capacity of oxidative metabolism
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Midwest Performance Enhancement Seminar 2011
Repeated-Sprint Exercise
• Strategies– Alactic power development– Alactic capacity depending on duration of sprints– Aerobic power and capacity development– Endurance-based strength training
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Midwest Performance Enhancement Seminar 2011
Longer All-out/Mixed/Interval Exercise
• Longer All-out/Mixed/Interval Exercise– Longer periods of activity mixed with variable
periods of higher intensity– Variable active/pure rest periods– Performance depends on level of effort, duration
of activity, and duration of rest– Energy production from any system is not
necessarily maximal
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Midwest Performance Enhancement Seminar 2011
Longer All-out/Mixed/Interval Exercise
• Limiting Factors• Overreliance on glycolytic metabolism for
longer activity periods• Underdevelopment of oxidative metabolism• Low anaerobic threshold• Low power output below anaerobic threshold• Inability to recover from brief periods of high
power output
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Midwest Performance Enhancement Seminar 2011
Longer All-out/Mixed/Interval Exercise
• Strategies• Alactic power/capacity for explosive bursts• Glycolytic power/capacity development for
shorter activity periods• Aerobic power development*• Anaerobic threshold training• Optimal levels vs. maximal
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Midwest Performance Enhancement Seminar 2011
Time-Motion Study - Wrestling
• Olympic Freestyle/Greco-Roman Wrestling• 3 – 2 minute rounds• Ave. 16 bursts of high-intensity activity• ~3 seconds per burst• ~23 seconds of recovery• Prolonged isometric activity/higher levels of
lactate (glycolytic)
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Midwest Performance Enhancement Seminar 2011
Anaerobic Threshold
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Midwest Performance Enhancement Seminar 2011
Training Notes• Most field/team sports are Alactic-Aerobic in nature
(AKA, repeated-sprint exercise)• Repetitive sprinting requires adequate aerobic power
and capacity for medium intensity work AND restoration of short-term energy substrates (creatine phosphate)
• Insufficient aerobic development causes premature fatigue due to reliance on glycolytic energy production
• Constant use of high intensity methods interferes with recovery due to SNS stimulation and does not address medium intensity adaptations.
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Midwest Performance Enhancement Seminar 2011
Interval vs. Continuous
• Constant use of high-intensity methods interferes with recovery between sessions
• Interval training does not address medium intensity needs of many team sports
• Results from high-intensity interval training peak quickly• Continuous aerobic training increases aerobic enzymes and
reduces anaerobic enzymes.• Anaerobic interval training increases both aerobic and
anaerobic enzymes• Increasing oxidative capacity results in less lactate
production despite the same rate of glycogenolysis
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Midwest Performance Enhancement Seminar 2011
Interval vs. Continuous
• Greater mitochondrial biogenesis occurred with lower power training than high-power interval training
• Most effective training to increase mitochondria resulted with continuous training near anaerobic threshold
• Interval training improves oxidation rate between bouts of activity
• FYI… intermittent isometric training also increases mitochondrial enzymes
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Midwest Performance Enhancement Seminar 2011
Tabata
Anaerobic capacity increased 23% in 4 weeks, 28% by week 6
VO2 increased significantly to week 3 and then leveled out
Endurance training increased maximal oxygen uptake steadily throughout the study
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Midwest Performance Enhancement Seminar 2011
The Methods
• Cardiac output development– Major determinant of whole body aerobic power
• Alactic power and Capacity Development• Glycolytic Power and Capacity Development• Aerobic Power and Capacity Development
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Midwest Performance Enhancement Seminar 2011
Cardiac Output Development
• Central adaptation• COD Training results in eccentric left ventrical
hypertrophy• Increases oxygen delivery to working muscles• Accelerates recovery between exercise bouts
within a training session may contribute to faster recovery between sessions (sympathetic to parasympathetic)
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Midwest Performance Enhancement Seminar 2011
Cardiac Output Development
• Not all athletes need it or need much of it• Some need a lot• Athletes with lower resting heart rates and/or those
who recover quickly from intensive exercise may not need specific COD training
• Great initial sprint performance may need more• Heart rates should fall into the 120-150 bpm range to
maximize left ventricular refill• Durations lasting 20-60 minutes 1-2x/week as needed
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Midwest Performance Enhancement Seminar 2011
Left Ventricular Hypertrophy
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Midwest Performance Enhancement Seminar 2011
Cardiac Output Development
• Means– Continuous activity (jog, bike, aerobic equipment,
etc.)– Body weight circuits– Jump rope– Medicine ball throws– Slide board– Light strength work– Combinations– Breathing exercises
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Midwest Performance Enhancement Seminar 2011
Alactic Energy System Development
• Increases the rate at which alactic system can turn on (alactic power)
• Increases the duration that the alactic system can produce energy (alactic capacity)
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Midwest Performance Enhancement Seminar 2011
Alactic Power Development• Alactic power intervals (rate)– 1-3 sec ATP/6-10 seconds ATP+CP – Passive/low intensity recovery (walking)– Work:Rest Ratio 1:20 (max power each rep)– 2-5 sets x 15-30 total reps– Frequency every 3rd day– Development time 4-6 weeks– Maintenance 1-2x/week– Sprints, prowler push, sled, jumps, explosive push-ups,
agility training
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Midwest Performance Enhancement Seminar 2011
Alactic Capacity Development
• Alactic Capacity Intervals– 8-15 seconds– Passive/low intensity recovery (walking)– Work:Rest Ratio 1:8 (decreasing rest for specificity)– 3-5 sets x 12-24 total reps – Up to 1-3 times per week– Development time 4-6 weeks – Maintenance at 1-2x/week– Sprints, prowler push, sled, jumps, jump squats,
explosive push-ups, agility training
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Midwest Performance Enhancement Seminar 2011
Alactic Energy System Development
• Alactic Capacity Intervals
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Midwest Performance Enhancement Seminar 2011
Glycolytic Energy System Development
• Increase the rate of glycolytic energy production• Increase the capacity of glycolytic energy
production• Improve buffering of H+ and strong ions• Increases cardiac strength/concentric hypertrophy
because of near maximal heart rates• Glycolytic system can be trained quickly with
lower volumes• Too much is destructive to aerobic performance
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Midwest Performance Enhancement Seminar 2011
Glycolytic Power Development
• Glycolytic power intervals– 20-40 seconds maximal intensity– Light activity/Active rest between sets– 4’ up to 10’ rest periods (Larger peak lactate)– 2-4 sets x 1-3 reps/set– Frequency 2x/week– Development time 4-6 weeks– Maintenance 1-2x/week– Sprints, shuttles, sport specific drills (muscle specific)
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Midwest Performance Enhancement Seminar 2011
Glycolytic Capacity Development
• Glycolytic Capacity Intervals– 30 sec-2 minutes at best effort– 1-2 minutes active rest between reps
(incomplete); 4-6 minutes active rest between sets– 2-4 sets x 3 reps– Frequency 2x/week– Development time 4-6 weeks– Maintenance 1-2x/week– Runs and sport specific drills (muscle specific)
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Midwest Performance Enhancement Seminar 2011
Aerobic Power Development
• Aerobic power• 1-5 min intervals• Work:Rest Ratio 1:1 to 1:0.5• 3-6 reps• 1-2x/week• Slightly above anaerobic threshold
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Midwest Performance Enhancement Seminar 2011
Aerobic Power Development
• Threshold Training• 10-20 minutes +/- anaerobic threshold• 5-10’ rest• 1-5 reps (fewer reps at longer durations)• 1-3x/week• Runs, circuits, sport specific drills
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Midwest Performance Enhancement Seminar 2011
Aerobic Power Development
• Gotta do it fast?• 6-12 x 2’/1’ rest– 30sec/90sec rest x 8– 6sec/1’ rest x 15
• 2-3x/week• Also increases buffering capacity
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Midwest Performance Enhancement Seminar 2011
Aerobic Capacity Development
• Aerobic Capacity• 8-20 min at best steady state• 1-3 reps• 4-10 min passive rest• 1-2x/week• Runs, drills, circuits, short-sided games
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Midwest Performance Enhancement Seminar 2011
Compatibility
• Lower level athletes– Inability to generate intensity– Large window of adaptation– Concurrent training
• Higher level athletes– Concentration of loading – Conflicting stimuli from differing physiological
systems– Block periodization
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Midwest Performance Enhancement Seminar 2011
Compatibility
• Aerobic Development• Heart chamber size• Muscle capillarization• Mitochondrial biogenesis• Myoglobin increase• Aerobic enzymes
• Glycolytic Development• Heart muscle thickness• Reduced capillarization• Decreased mitochondria• Glycolytic enzymes
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Midwest Performance Enhancement Seminar 2011
Compatibility
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Midwest Performance Enhancement Seminar 2011
Questions