Study guide
1.5 Evaluating Work Capacity Across Broad Time and Modal Domains
Certified CrossFit Trainer CCFT / CF-L3
Track your progress as you read
Finished sections get a check mark.
1 Chapter 1: Screening and Ongoing Assessment
1.1 Health & Medical Screening (PAR-Q+, Risk Stratification & Pre-Participation) 1.2 Referral Criteria & Medical Clearance Protocol 1.3 Rhabdomyolysis Risk Screening & Psychological Tolerance for Training 1.4 Movement Analysis & Baseline Physical Assessment 1.5 Evaluating Work Capacity Across Broad Time and Modal Domains 1.6 Goals, Progression Readiness, Overtraining Monitoring & Performance Tracking
2 Chapter 2: Programming - Designing Workouts and Cycles
2.1 Energy Systems, Workout Formats & Stimulus Selection 2.2 Volume, Intensity & Density Manipulation 2.3 Sequencing Workouts for General Physical Preparedness 2.4 Periodization Models (Linear, Conjugate, Block & Peaking) 2.5 Evaluating Programming: Benchmarks, Adjustment & CrossFit's Definition of Fitness
3 Chapter 3: Programming - Scaling for Every Athlete
3.1 Scaling & Modification Strategies for Varied Populations 3.2 Scaling by Age Group: Youth, Adolescent & Masters Athletes 3.3 Scaling for Special Populations: Pregnancy, Postpartum & Adaptive Athletes 3.4 Scaling & Programming for Athletes with Sport-Specific Goals 3.5 Programming for Injured Athletes: Maintaining Fitness & Restoring Function
4 Chapter 4: Educating - Teaching CrossFit Concepts
4.1 Teaching the Definition of CrossFit & the Character of Functional Movement 4.2 Teaching CrossFit's Definitions of Fitness and Health: The Four Models 4.3 Teaching the Goals of CrossFit Programming and How Variance Achieves Them 4.4 Teaching the Technique-Intensity Relationship, Threshold Training & Relative Intensity 4.5 Teaching the Principles of Scaling
5 Chapter 5: Educating - Teaching and Demonstrating Movement
5.1 Teaching Progressions & Points of Performance for Primary Lifts 5.2 Gymnastics Progressions & Body Control Mechanics 5.3 Group & Individual Instruction Methods 5.4 Designing Progressions for Complex Movements 5.5 Teaching and Using Correct Spotting Techniques 5.6 Demonstrating Movements, Faults and Progressions
6 Chapter 6: Training - Seeing Movement
6.1 Identifying Points of Performance Across the Foundational Movements 6.2 Recognising Sound Mechanics: What 'Good' Actually Looks Like 6.3 Fault Identification, Root-Cause Analysis & Contraindications 6.4 Identifying Faults in the Olympic Lifts and Gymnastics Movements 6.5 Root-Cause Analysis: Mobility, Stability, Motor Control or Load 6.6 Refining Sound Mechanics and Identifying Common Themes Across a Class
7 Chapter 7: Training - Correcting Movement
7.1 Cueing Strategies (Verbal, Visual, Tactile) & Feedback Loops 7.2 Selecting Corrective Cues: Short, Specific, Actionable 7.3 Reinforcing Sound Mechanics & Balancing Relentlessness With Acknowledgement 7.4 Applying Basic Principles of Anatomy and Biomechanics 7.5 Coaching the Midline: Bracing, Breathing and Spinal Position Under Load 7.6 Fault Triage: Addressing the Most Egregious Fault First 7.7 Refining Mechanics to Optimise Performance Under Fatigue 7.8 Intra-Session Adjustments & Real-Time Coaching Decisions
8 Chapter 8: Leadership and Management
8.1 Providing Athletes With Goal Setting 8.2 Building a Culture of Excellence and Establishing Rapport 8.3 Coach Development, Mentorship & Staff Supervision 8.4 Mechanics-Consistency-Intensity as a Management Strategy 8.5 Managing Athlete Risk, Recognising Overexertion & Teaching Personal Responsibility 8.6 Floor Flow, Class Structure & Time Management 8.7 Engaging Virtual and Remote Athletes 8.8 Safety Zones, Equipment Handling & Facility Setup 8.9 Balancing Individual Attention, Group Cohesion & Class Logistics 8.10 Athlete Onboarding & Retention Systems
9 Chapter 9: Lifestyle Education
9.1 Identifying Nutrition Goals and Assessing an Athlete's Nutrition 9.2 Providing Nutrition Guidance & Outlining Dietary Strategies 9.3 Zone Diet Block Calculations & Macronutrient Manipulation 9.4 Caloric Estimation & Sub-Population Nutritional Needs 9.5 Reviewing Basic Health Markers 9.6 Teaching Food Labels and Building Sample Meal Plans 9.7 Lifestyle Goals, Assessment & Scope-of-Practice Limits 9.8 Sleep, Stress Management & Recovery Modalities 9.9 Behavioral Change, Goal Setting & Habit Formation
10 Chapter 10: Professional Responsibilities and Ethics
10.1 Self-Assessment of Training Sessions & Pursuing Continuing Education 10.2 Legal Liability, Risk Management & Informed Consent 10.3 Facility Operations, Maintenance & Equipment Standards 10.4 Recognising and Responding to Extreme Environmental Conditions 10.5 Insurance, Employment Status & Truth in Advertising 10.6 Emergency Response, First Aid & Rhabdomyolysis Prevention 10.7 Scope of Practice & Interprofessional Collaboration 10.8 Standards of Professional Practice & Ethical Guidelines 10.9 Documentation, Incident Reporting & Record Keeping 10.10 Confidentiality, Client Records & Mandated Reporting
1.5 Evaluating Work Capacity Across Broad Time and Modal Domains
Key Takeaways Explain This Topic AI
CrossFit defines fitness as work capacity across broad time and modal domains, so evaluating an athlete means measuring power output at several durations and in several modalities — not one test.
Work is force times distance; power is work divided by time. A benchmark score converts to average power, which is what makes different workouts comparable.
A defensible assessment battery samples at least three time domains (roughly under 3 minutes, 5-15 minutes, and over 20 minutes) and all three metabolic pathways.
Gaps show up as a jagged profile: an athlete who is strong in short heavy efforts but collapses past 12 minutes has an aerobic deficiency, and the programming answer is more aerobic work, not more strength.
Retest conditions must match test conditions — same movements, same standards, same equipment, same scaling — or the comparison is meaningless.
Last updated: August 2026
Work Capacity Is the Measurement CrossFit Actually Cares About
CrossFit's definition of fitness is increased work capacity across broad time and modal domains . Every word of that definition is a measurement instruction. Work capacity means you must measure work, not effort. Broad time domains means one test is never enough. Broad modal domains means the tests must span weightlifting, gymnastics, and monostructural work. Domain 1 of the CCFT outline asks you to "evaluate athlete's work capacity" as a distinct task from assessing whether they can perform a functional movement — capability is can you do it , capacity is how much can you do .
The Physics You Are Expected to Use
Work = Force x Distance. Moving a 95 lb barbell overhead through 4 feet does 380 ft-lb of work per rep.
Power = Work / Time. Doing that same rep in 2 seconds produces 190 ft-lb/s; doing it in 4 seconds produces 95 ft-lb/s. Same work, half the power.
Intensity , in CrossFit's usage, is exactly power. This is why the methodology treats intensity as objectively measurable and independent of how hard something felt.
Worked example: an athlete completes 21-15-9 thrusters at 95 lb and pull-ups ("Fran") in 5:00. The barbell work alone is 45 reps x 95 lb x 4 ft = 17,100 ft-lb. Divided by 300 seconds, that is 57 ft-lb/s of average barbell power. The same athlete a year later finishes in 3:20 (200 s), producing 85.5 ft-lb/s — a 50% increase in average power at the same load. That number, not a subjective sense of fitness, is the evidence of adaptation.
Building a Defensible Assessment Battery
A single benchmark is a data point; a battery is an assessment. Sample the time domains and the modalities deliberately:
- Time domain Dominant pathway Representative tests
- 0-30 seconds Phosphagen 1RM back squat, 1RM clean & jerk, max unbroken strict pull-ups, 100 m sprint
- 30 s - 3 min Glycolytic 500 m row, "Fran", 40 unbroken double-unders, 1 min max burpees
- 5-15 min Mixed glycolytic/oxidative "Helen", "Cindy" (20 min variant), 2,000 m row, 1 mile run
- 20 min + Oxidative 5 km run, 30 min AMRAP, "Murph", 10 km row
Across those, make sure you have at least one pure weightlifting test, one pure gymnastics test, one pure monostructural test, and two or three mixed-modal couplets or triplets. Six to eight benchmarks re-tested on a rolling basis is realistic for a group programme; twelve is realistic for individual design.
Reading the Profile
Plot the athlete's percentile or relative rank across the battery and look at the shape , not the average. Three common shapes and their programming answers:
Strong-short, weak-long. Excellent 1RMs and sub-3-minute scores; times fall off a cliff past 12 minutes. This is an aerobic deficiency. The answer is more time at conversational pace and more 20+ minute work — not more strength cycles, which is what the athlete will want.
Strong-long, weak-heavy. Good engine, poor absolute strength; the athlete is limited by load in every barbell workout. The answer is a dedicated strength block with reduced conditioning volume, accepting a temporary dip in the long-domain scores.
Modally jagged. Fine on the rower and the barbell, falls apart on gymnastics. The answer is skill volume at low intensity — accumulated strict work, hollow/arch positions, and progressions — before adding gymnastics to metcons.
The CrossFit prescription is deliberately biased toward the worst domain: work your weaknesses. An athlete who only trains what they are good at gets a narrower, not broader, capacity.
Test Conditions and Valid Retesting
A retest is only evidence if the conditions match. Fix and record:
Movement standards — depth, lockout, chin over bar, hip crease below knee. If standards drifted, the score drifted.
Loads and implements — the same bar, the same rower with the same damper setting and drag factor, the same box height.
Scaling — a scaled retest compares only against the identical scaled version, and must be labelled as such.
Context — time of day, position in the training week, and what the athlete did in the preceding 48 hours. Retesting "Fran" the day after a heavy squat session is not a fair sample.
Interval — 8 to 12 weeks is the usual retest window. Retesting monthly produces noise; retesting yearly produces no feedback.
Document scores in a system the athlete can see. Visible, comparable data is both an assessment instrument and the single most reliable retention tool a coach has, because it makes invisible progress visible.