1.1 Introduction to Athletic Performance

The short version

Athletic performance sounds like one thing. It is not. When someone says a player is a great athlete, they usually mean the visible stuff: they run fast, they jump high, they change direction without falling over, they still look fresh in the last five minutes. All of that is the surface. Underneath sit a handful of separate qualities, and every one of them can be trained.

This article lays out what those qualities are, how the nervous system and the body’s energy supply feed into them, and how coaches stack training so the qualities build on each other instead of fighting. If you are new to this, you get a mental model for what “getting better at sport” actually means. If you already coach, treat it as the map the rest of the series hangs off: strength, plyometrics, speed and mobility all sit somewhere on it.

One run past a defender, five jobs

Watch a winger accelerate past a defender. It looks like one action. Underneath, five separate jobs are clocking in at once.

His muscles have to produce force. They have to produce it fast, because the defender isn’t waiting. And his fuel supply has to be ready right now — no warm-up granted.

His nervous system has to fire the right muscles in the right order, or he trips over his own feet. And his ankles, knees and tendons have to soak up the landing without giving way — not once, but a hundred times in a match.

Count them: force, speed of force, fuel, coordination, and tissue that holds up. Five jobs, one movement.

Performance is what you see when all five line up. It’s never a single number on a test sheet.

The three-month mistake

Here’s why this matters more than it sounds. A basketball player spends three months on jump training and still can’t jump higher.

The obvious conclusion: she has a jumping problem. Usually she doesn’t.

Maybe she isn’t strong enough to push hard into the floor. Maybe her timing on the takeoff is off, so force leaks sideways instead of going down. Or maybe she’s simply tired — training hard, sleeping badly, never recovering enough to actually improve.

Three different problems, three different fixes. Jumping more helps exactly one of them.

The timelines differ too. The detail sections below note that coordination and other neural qualities can shift within 2-4 weeks, while muscle and tendon generally need 8-12+ weeks to change — so the right fix is often a faster fix than you’d guess.

Seeing the whole system is what stops you training the wrong thing for months. That’s the entire point of this article.

You are a car (stay with me)

The easiest way to hold all five jobs in your head is a car.

Maximum strength is engine size — how much force is available at all. Power is how quickly that engine gets the car moving from a standstill.

Technique is the steering and the suspension. It decides how much of the engine’s output actually reaches the road instead of getting wasted.

And recovery is the pit crew — the reason the car keeps going without breaking down mid-race.

A huge engine with bad steering still loses to a smaller, better-tuned car. Athletes work exactly the same way: raw strength and raw speed without the systems around them rarely win anything.

The road part is worth taking literally, by the way. The ground pushes back on you with exactly the force you push into it, so sprinting and jumping are really contests of how well you direct force into the floor.

Same with the drivetrain. In a throw, force starts at the hips and legs, travels through the trunk, and arrives at the hand — one stiff hip or weak core along that chain, and power drains away before it gets there.

Recap: engine, launch, steering, pit crew. Performance needs all four, not just the biggest engine.

Your level sets your menu

What you need from all this depends on where you sit.

Training for general fitness? You mostly need a base: get stronger, learn to move well, keep showing up. That’s plenty, and it works.

Preparing for a specific sport? Now you add power, speed and the particular conditioning your sport demands, because a hockey shift and a soccer half are not the same problem. One is a short, savage burst repeated with barely a breather; the other stretches across 8-12 km of running, punctuated by the sprints that decide it.

A professional needs all of that managed almost day by day. At that level the gap between winning and losing is thin enough that one badly placed hard session shows up on the scoreboard.

Which is also why copying a pro’s plan is a classic trap. You’re borrowing the workouts without borrowing the training age or the recovery capacity underneath them.

Two ideas that run through everything

First: the qualities stack in a rough order. Skill and tactics sit at the top, speed and power in the middle, strength and work capacity underneath — and joint health and movement quality hold the whole thing up.

You can’t max out the top without a solid base. Coaches compress this into one line: build the base before you build the peak.

Chasing the flashy top floors with nothing underneath is the classic mistake. It’s also the slowest route to the very thing you’re chasing.

Second: your nervous system and connective tissue are as trainable as muscle. They just change more slowly, and they get far less attention than they deserve.

It’s why a lean sprinter can be more powerful, pound for pound, than a much bigger untrained person. Her wiring — not just her muscle — has been trained to recruit and fire efficiently.

Train the system, not just the muscle. Let that one follow you through the rest of this series.

Where the map goes next

The rest of the article is the mechanism behind this map:

• the performance pyramid in detail,
• how the three energy systems share the load,
• what motor unit recruitment has to do with a lean sprinter out-jumping a bigger athlete,
• the biomechanics of pushing into the ground,
• and how a training week gets built around all of it.

Those sections are more technical. Head there when you want the mechanism rather than the map.

Advanced Section: The Physiology and Biomechanics Behind Performance

To understand performance at a technical level, it helps to organize the underlying qualities into a hierarchy often referred to as the performance pyramid. This concept is used, in various forms, by organizations such as the NSCA and performance systems like ALTIS and EXOS. The general idea is that each level of the pyramid depends on the level below it — you cannot maximize the top of the pyramid without a solid base (Turner & Comfort, 2018).

Diagram: The Performance Pyramid

Sport Skill & Tactical Execution
↑
Speed, Power & Rate of Force Development
↑
Maximum Strength
↑
Movement Quality & Mobility
↑
Tissue Tolerance, Work Capacity & General Physical Preparedness

Reading the pyramid from the bottom up: An athlete first needs enough general work capacity and tissue tolerance to handle training at all. On top of that, they need adequate joint mobility and movement quality so that force can be expressed through a full, efficient range of motion. On top of that sits maximum strength — the capacity to produce high force, generally expressed as a 1-rep max or a heavy multi-rep effort. Above strength sits power and rate of force development (RFD) — how quickly that strength can be turned into fast, explosive movement. At the very top sits sport skill: The technical and tactical ability to apply all of the above in the chaotic, reactive environment of actual competition.

Energy Systems: The Fuel Behind the Movement

Every muscle contraction requires adenosine triphosphate (ATP). The body has three broad systems for resupplying ATP, and different sports lean on different systems (Haff & Triplett, 2016):

• ATP-PC (phosphagen) system: Supplies energy almost instantly but only lasts roughly 6-10 seconds at maximal effort. This is the dominant system for a single sprint, a single jump, or a single heavy lift.
• Glycolytic system: Breaks down glucose without oxygen, dominant from roughly 10 seconds to 2 minutes of high-intensity effort. This is the system that produces the "burn" during repeated sprints or a hard wrestling scramble.
• Oxidative (aerobic) system: Uses oxygen to produce ATP efficiently over long durations, dominant beyond about 2 minutes and responsible for recovery between efforts in every sport.

Almost no sport uses only one system. A soccer match is aerobic in its overall demand but decided by anaerobic, ATP-PC-driven moments such as a sprint to goal. This interplay is a major reason why "conditioning" for sport looks very different from steady-state cardio training, a topic explored in more depth in later articles on energy system development.

Neuromuscular Foundations

Muscles do not act on their own; they are told what to do by the nervous system. Two neuromuscular concepts matter enormously for performance:

• Motor unit recruitment: A motor unit is a motor neuron and all the muscle fibers it controls. Higher-threshold motor units, which control the largest and fastest fibers, are brought in as the force required rises (Haff & Triplett, 2016). Heavy loads and maximal-intent efforts reach them early in a set and are the most specific way to build maximal strength, but lighter loads taken close to failure also reach them as fatigue accumulates and lower-threshold units fade (Beausejour et al., 2024). What leaves them untrained is easy work stopped a long way short of hard.
• Rate coding: Once a motor unit is recruited, the frequency at which it fires (its "rate code") determines how forcefully and quickly it contracts. Training for speed and power specifically improves the nervous system's ability to fire motor units rapidly, independent of any change in muscle size (Cormie et al., 2011).

This is a key reason a lean sprinter can be far more powerful, pound for pound, than a much larger but untrained person: The nervous system, not just the muscle tissue, has been trained to recruit and fire efficiently (Cormie et al., 2011). The nervous system, fascia, and connective tissues will each get a dedicated article later in this series, since they are frequently under-appreciated relative to muscle.

Biomechanical Principles

Biomechanics is the study of forces and motion in the body. Three principles show up repeatedly across sports:

• Ground reaction force (GRF): By Newton's third law, the ground pushes back on the body with equal and opposite force to what the body pushes into the ground. Sprinting, jumping, and change of direction are all, at their core, about how efficiently an athlete can direct force into the ground and redirect the resulting ground reaction force (GRF) into useful motion.
• Kinetic chains: The body transmits force through a sequence of joints and segments — for example, in a throw, force is generated at the hips and legs, transferred through the trunk, and finally expressed at the hand. A breakdown anywhere in this chain (a stiff hip, a weak core) reduces the force available at the end point.
• Joint arthrokinematics and osteokinematics: Osteokinematics describes the gross motion of bones (flexion, extension, rotation), while arthrokinematics describes the small gliding, rolling, and spinning motions that occur inside the joint itself to allow that gross motion to happen smoothly. Restrictions at the arthrokinematic level are a common, often overlooked cause of "tight" feeling joints.

Practical Section: Turning Theory Into Training

Every training plan, regardless of sport, has to manage the same handful of variables (National Strength and Conditioning Association). Understanding these variables is the practical bridge between the science above and an actual program.

• Volume: The total amount of work performed (sets × reps × load, or total distance, or total time).
• Intensity: How hard each effort is, relative to an athlete's maximum capability.
• Frequency: How often a given quality is trained per week.
• Rest periods: Time allowed between sets or efforts, which determines which energy system is emphasized and how much fatigue accumulates.
• Recovery: The processes (sleep, nutrition, active recovery, deloading) that allow the body to adapt to the stress of training rather than simply breaking down under it.
• Monitoring fatigue: Tracking subjective and objective markers (soreness, sleep quality, bar speed, heart rate variability) to know when to push and when to back off.

A General Weekly Framework

While specific programming is covered in depth in the Section 5 articles on periodization and weekly programming, a general early-stage framework for a field or combat sport athlete might look like this:

• Day 1: Maximum strength emphasis (lower body) + short sprint/acceleration work
• Day 2: Recovery, mobility work, low-intensity skill practice
• Day 3: Maximum strength emphasis (upper body/trunk) + plyometric/reactive work
• Day 4: Sport practice, conditioning specific to competitive demands
• Day 5: Power and speed emphasis, lower overall volume, higher quality of movement
• Day 6-7: Competition or full recovery, depending on the phase of the season

What each element in the week is doing

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• Maximum strength emphasis, lower body (Day 1). Raises the amount of force the athlete can produce at all. Almost every other quality on this list is a way of expressing force, so the ceiling here sets the ceiling everywhere else.
• Short sprint and acceleration work on the same day. Placed before or immediately after heavy lifting while the nervous system is fresh, because speed is a quality that is trained and never a quality that is survived.
• Recovery, mobility work, low-intensity skill practice (Day 2). Mobility work is placed on a low day so it gets genuine attention. Light skill practice keeps motor learning ticking over without adding physical cost.
• Maximum strength emphasis, upper body and trunk (Day 3). Splitting upper and lower work lets each region be loaded hard while the other recovers, which is what makes two heavy days in a week possible.
• Plyometric and reactive work. Trains the stretch-shortening cycle, so stored elastic energy contributes to output rather than being wasted as heat.
• Sport practice and specific conditioning (Day 4). The transfer step. General qualities only become performance when they are expressed inside the sport’s own movements and energy demands.
• Power and speed emphasis at lower volume, higher quality (Day 5). Power is a rate quality, and rate collapses under fatigue. Reducing volume is what protects the quality being trained.
• Competition or full recovery (Days 6 and 7). Adaptation happens between sessions, not during them. A week without a genuine low point produces accumulated fatigue that looks like a plateau.

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This is a template, not a prescription — the right structure always depends on the sport's competitive calendar, the athlete's training age, and how well they are recovering (Bompa & Buzzichelli, 2019).

Sport Applications: How the Demands Shift

The same underlying qualities — strength, power, speed, endurance, mobility — show up in every sport, but the proportions change dramatically. A brief overview:

The Science of Periodization: How to Train for Peak Performance — The Movement System. Sets out how training blocks are sequenced over months, which is the framework the rest of this series builds on.

• mixed martial arts (MMA) / Boxing / Wrestling / Brazilian jiu-jitsu (BJJ): A blend of anaerobic power (strikes, takedowns, scrambles) and extraordinary muscular endurance, since rounds are long and grappling exchanges are isometric-heavy. Grip strength, rotational power, and the ability to produce force from awkward, off-balance positions are critical.
• Football: Explosive, short-duration power dominates (blocks, sprints, tackles), layered on top of very high strength and mass requirements for most positions, with repeated-sprint capacity for skill positions.
• Soccer: An aerobic base sport punctuated by decisive anaerobic actions — sprints, jumps for headers, rapid changes of direction — often covering 8-12 km per match.
• Hockey: Repeated short bursts of extremely high power output (skating strides, checks, shots) within very short shift lengths, demanding fast recovery between efforts and excellent hip mobility for the skating stride.
• Basketball / Volleyball: Vertical power and reactive strength dominate (jumping, blocking), combined with lateral quickness and shoulder durability for overhead actions.
• Baseball: Rotational power and single-effort explosiveness (throwing, hitting) with very high demands on shoulder and elbow tissue tolerance due to repetitive high-velocity arm action.
• Sprinting / Olympic Weightlifting / Powerlifting: These are the "purest" expressions of the qualities themselves — sprinting is applied horizontal power, weightlifting is applied vertical power and technical mastery, and powerlifting is applied maximum strength.
• Rugby: Combines football-like collisions with soccer-like aerobic demands and hockey-like repeated high-power efforts, arguably one of the broadest demand profiles in sport.
• Tennis: Repeated short bursts of rotational and lateral power over a match that can last hours, with very high demands on shoulder health and change-of-direction ability.

Dedicated articles later in this series (Section 3) provide detailed sport-specific programming for MMA, football, soccer, and hockey specifically.

Common Mistakes

• Chasing the top of the pyramid (sport skill, speed) without a strength base underneath it.
• Copying a professional athlete's program without matching their training age or recovery capacity.
• Ignoring recovery and treating fatigue as something to push through rather than manage.
• Training only the energy system that "feels" like the sport, while ignoring the others that also contribute.

Coaching Cues

• "Build the base before you build the peak."
• "Train the system, not just the muscle."
• "If technique breaks down, the set is over — regardless of the number on the bar or the clock."

FAQs

Do I need to train every quality (strength, power, speed, endurance) at once?
Not with equal emphasis. Early in a training career, general strength and movement quality should dominate. As training age increases, programming becomes more specific to the demands of the sport and the individual's weaknesses (Lloyd & Oliver, 2012).

Is athletic performance mostly genetic?
Genetics influence the ceiling (fiber type distribution, limb length, tendon stiffness), but the vast majority of athletes never come close to their genetic ceiling. Consistent, well-structured training closes most of the practical gap.

How long does it take to see performance improvements?
Neural adaptations (coordination, motor unit recruitment) can improve within 2-4 weeks. Structural adaptations (muscle size, tendon stiffness, connective tissue remodeling) generally take 8-12+ weeks to meaningfully change.

Recommended Videos

What Is the ALTIS Foundation Course All About? — ALTIS World
Watch on YouTube
A short overview from one of the most respected coach-education organizations in track and field, useful for understanding how elite performance coaches think about the athlete development process as a whole.

The Specificity Principle Explained in Simple Terms | Day #8 WellFit 365 — WellFit Personal Training. A plain-language walk through specificity, the principle that decides whether training transfers to your sport.

Long-Term Athlete Development, with Rhodri Lloyd — NSCA
Watch on YouTube
A lecture from the National Strength and Conditioning Association explaining how physical qualities should be sequenced and developed over an athlete's lifetime, which pairs directly with the performance pyramid discussed above.

References

Beausejour, J. P., Knowles, K. S., Pagan, J. I., et al. (2024). The effects of resistance training to near volitional failure on motor unit recruitment during neuromuscular fatigue. PeerJ, 12, e18163. Read on PMC

Bompa, T. O., & Buzzichelli, C. (2019). Periodization: Theory and methodology of training (6th ed.). Human Kinetics.

Cormie, P., McGuigan, M. R., & Newton, R. U. (2011). Developing maximal neuromuscular power: Part 1 — biological basis of maximal power production. Sports Medicine, 41(1), 17-38.

Haff, G. G., & Triplett, N. T. (Eds.). (2016). Essentials of strength training and conditioning (4th ed.). National Strength and Conditioning Association / Human Kinetics.

Lloyd, R. S., & Oliver, J. L. (2012). The youth physical development model: A new approach to long-term athletic development. Strength & Conditioning Journal, 34(3), 61-72.

National Strength and Conditioning Association. (2017). NSCA's guide to program design (J. Hoffman, Ed.). Human Kinetics.

Turner, A. N., & Comfort, P. (Eds.). (2018). Advanced strength and conditioning: An evidence-based approach. Routledge.

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