NASM-VCS cheat sheet
NASM-VCS · Keep the key ideas within reach.
Basic and Applied Sciences
The OPT model's five phases map to three training stages: stabilization (phase 1), strength (phases 2-4), and power (phase 5).
Muscle spindle fibers detect stretch and rate of stretch, triggering the stretch reflex; Golgi tendon organs detect tension and inhibit contraction to protect the muscle.
Acute variables include repetition, sets, intensity, tempo, rest interval, volume, exercise selection, and exercise order.
The three primary energy systems: phosphagen (ATP-PC) for ~0-10 s high intensity, glycolysis for ~30 s-2 min, and oxidative for sustained submaximal work.
Type I fibers are slow-twitch, fatigue-resistant, and oxidative; Type II fibers are fast-twitch, glycolytic, and fatigue quickly but produce high force.
Force-velocity relationship: as concentric velocity increases, force capacity decreases; eccentric contractions can produce greater force than isometric or concentric.
Davis's law: soft tissue remodels along the lines of mechanical stress; Wolff's law: bone remodels in response to the loads placed on it.
Stroke volume increases with aerobic training, raising cardiac output (Q = HR x SV) and lowering resting heart rate.
Assessment
The PAR-Q+ screens for medical readiness; a positive screen requires medical clearance before moderate-to-vigorous exercise.
Static posture assessment views: anterior, posterior, lateral, and overhead squat; deviations suggest tight/overactive and weak/underactive tissue pairs.
The overhead squat assesses dynamic flexibility and integrated total-body movement; the single-leg squat assesses balance, ankle, and hip stability.
Common postural distortion patterns: lower crossed syndrome (anterior pelvic tilt), upper crossed syndrome (forward head/rounded shoulders), and pronation distortion syndrome.
Cardiorespiratory assessments include the YMCA 3-minute step test, Rockport 1-mile walk, and the 1.5-mile run; submaximal tests estimate VO2max from heart rate response.
The 3-minute step test uses a 12-inch step and counts recovery heart rate for 60 seconds post-test; lower recovery HR indicates better conditioning.
Body composition methods: skinfold calipers, bioelectrical impedance, and circumference measurements; DEXA and hydrostatic weighing are criterion standards.
Performance assessments: push-up and squat tests for muscular endurance, vertical jump for power, and the pro agility (5-10-5) test for speed and agility.
Program Design
Acute variable guidelines by phase: stabilization (12-20 reps, 4/2/1 tempo, 0-90 s rest), strength (1-12 reps, 2/0/2 tempo, 0-60 s rest), power (1-10 reps, explosive tempo, 0-60 s rest).
The OPT model progresses from stabilization endurance to strength endurance, hypertrophy, maximal strength, and finally power.
Resistance training systems include single-set, multiple-set, pyramid, superset, compound set, circuit training, and drop sets.
The general warm-up (5-10 min) raises core temperature; the specific warm-up rehearses movements at lower intensity before the training bout.
Cardiorespiratory training stages: base training (zone 1), fitness training (zones 1-2 with intervals), and performance training (zones 1-3 with high intensity).
The FITTE principle (frequency, intensity, time, type, enjoyment) guides cardiorespiratory program design.
Progressive overload must be applied gradually; the 2-for-2 rule increases resistance when a client can perform two extra reps over two consecutive sessions.
Periodization organizes training into macrocycles, mesocycles, and microcycles to manage volume and intensity over time.
Exercise Technique and Training Instruction
Five kinetic chain checkpoints: feet/ankles, knees, hips, shoulders, and head; deviations at any checkpoint indicate compensation.
The drawing-in maneuver (core stabilization) activates transversus abdominis; bracing co-contracts the global core musculature for heavy loads.
The five phases of a resistance exercise: eccentric, isometric (transition), concentric, isometric, and rest.
Eccentric (lowering) phase should last at least 2 seconds for controlled movement; stabilization exercises use slow 4/2/1 tempo.
Spotting rules: spot exercises where the bar passes over the face or shoulders; do not spot exercises where the bar is over the abdomen.
Breathing: exhale during the concentric phase and inhale during the eccentric phase; the Valsalva maneuver is contraindicated for hypertensive clients.
Common squat faults: knees moving inward (knee valgus), feet flattening, and excessive forward lean; cues address glute and ankle mobility.
Plyometric exercises follow the eccentric, amortization, and concentric phases; the amortization phase should be short to maximize power output.
Client Relations and Behavioral Coaching
The transtheoretical model stages: precontemplation, contemplation, preparation, action, and maintenance; interventions match the client's stage.
Self-efficacy (Bandura) is built through mastery experiences, vicarious experience, verbal persuasion, and physiological state.
SMART goals are specific, measurable, attainable, realistic, and time-bound; short-term goals build momentum toward long-term outcomes.
Motivational interviewing uses open-ended questions, affirmations, reflective listening, and summaries to resolve ambivalence.
The stages of change relapse can return a client to an earlier stage; the trainer reframes relapse as a learning event, not failure.
The health belief model: perceived susceptibility, severity, benefits, barriers, cues to action, and self-efficacy predict behavior change.
Effective communication includes active listening, empathy, and nonverbal cues; the trainer-client relationship is built on trust and confidentiality.
Client retention improves with individualized programming, realistic goal setting, regular follow-up, and celebrating small successes.
Professional Development and Responsibility
Scope of practice: certified personal trainers design and instruct exercise programs but do not diagnose, prescribe, or treat medical conditions.
The trainer must refer clients with signs of medical concern (chest pain, dizziness, joint pain) to a qualified healthcare provider.
Professional liability insurance and current CPR/AED certification are standard requirements for practice.
Informed consent, health history, and the PAR-Q+ should be documented before beginning an exercise program.
The NASM Code of Professional Conduct emphasizes integrity, confidentiality, and respect for clients and colleagues.
Continuing education units (CEUs) maintain certification; trainers should stay current with evidence-based practice.
The Health Insurance Portability and Accountability Act (HIPAA) governs the privacy of client health information.
Documentation of sessions, assessments, and progress supports accountability and protects both trainer and client.
Basic and Applied Sciences (supplemental)
The sliding filament theory: actin and myosin filaments slide past each other during contraction, shortening the sarcomere.
Muscle fiber types: Type I (slow oxidative), Type IIa (fast oxidative-glycolytic), and Type IIx (fast glycolytic).
The length-tension relationship: muscles produce the greatest force at resting length due to optimal actin-myosin overlap.
The all-or-none principle: a motor unit either fires completely or not at all; force is graded by recruiting more motor units.
The SAID principle (specific adaptation to imposed demands) means the body adapts to the specific stress applied.
The cardiorespiratory system transports oxygen via hemoglobin; the Fick equation relates VO2 to cardiac output and arteriovenous oxygen difference.
The endocrine system releases hormones such as cortisol (catabolic) and testosterone and growth hormone (anabolic) in response to training.
The nervous system's motor control hierarchy includes the cerebral cortex, cerebellum, and spinal cord; proprioceptors include muscle spindles and GTOs.
Assessment (supplemental)
The YMCA bench press test (men 80 lb, women 35 lb) measures upper-body muscular endurance at a 60-bpm cadence.
The Rockport 1-mile walk test uses a regression equation incorporating age, sex, body weight, time, and heart rate to estimate VO2max.
The 1.5-mile run test estimates VO2max from completion time using a standard regression equation.
Heart rate reserve (HRR) = maximal HR - resting HR; target HR = (HRR x intensity) + resting HR (Karvonen method).
Estimated maximal heart rate = 220 - age; the Tanaka formula (208 - 0.7 x age) is often more accurate.
The overhead squat assessment identifies dynamic flexibility, core strength, and balance deficits.
The push-up test assesses upper-body muscular endurance; the squat test assesses lower-body endurance.
The pro agility test (5-10-5) measures speed, agility, and change of direction.
Program Design (supplemental)
Volume is total repetitions x sets x load; intensity is expressed as a percentage of 1RM or RPE.
The 1RM can be estimated from a multiple-rep test using the Brzycki or Epley formula.
Exercise order: large muscle groups before small, multi-joint before single-joint, and power exercises before strength exercises.
Rest intervals: shorter (0-60 s) for endurance and hypertrophy, longer (2-5 min) for maximal strength and power.
Tempo notation (e.g., 4/2/1) refers to eccentric/isometric/concentric seconds; the fourth number is the rest between reps.
Circuit training alternates exercises with minimal rest to improve muscular endurance and cardiorespiratory fitness.
The OPT model's power phase uses 1-5 sets, 1-10 reps, and explosive tempo with 0-60 s rest.
Detraining occurs when training stops; the principle of reversibility states that gains are lost without continued overload.
Exercise Technique and Training Instruction (supplemental)
The five kinetic chain checkpoints guide all exercise technique: feet/ankles, knees, hips, shoulders, and head.
Core exercises progress from stabilization (plank, drawing-in) to strength (crunch, back extension) to power (medicine ball throws).
Balance exercises progress from stable to unstable surfaces and from static to dynamic movements.
Plyometric training should be performed on a firm, non-slip surface with adequate footwear and a proper warm-up.
The amortization phase of a plyometric is the shortest phase; a long amortization reduces power output.
SAQ (speed, agility, quickness) training uses drills such as cone shuffles, ladder drills, and sprint mechanics.
Resistance training for older adults emphasizes stable, controlled movements with adequate rest and medical clearance.
The Valsalva maneuver increases intrathoracic pressure and blood pressure; it is contraindicated for clients with hypertension or cardiovascular disease.
Client Relations and Behavioral Coaching (supplemental)
The transtheoretical model's precontemplation stage: the client is not yet considering change; the trainer provides information and builds rapport.
Contemplation stage: the client is considering change within six months; the trainer explores pros and cons and builds self-efficacy.
Preparation stage: the client intends to act within 30 days; the trainer helps set SMART goals and an action plan.
Action stage: the client has changed behavior within the past six months; the trainer reinforces progress and prevents relapse.
Maintenance stage: the client has sustained change for more than six months; the trainer supports long-term adherence.
The health belief model's perceived barriers and perceived benefits strongly predict whether a client adopts exercise.
Self-determination theory emphasizes autonomy, competence, and relatedness to support intrinsic motivation.
Goal setting should be collaborative and revisited regularly; outcome goals should be paired with process goals.
Professional Development and Responsibility (supplemental)
The NASM Certified Personal Trainer (CPT) credential requires CPR/AED certification and continuing education to maintain.
Scope of practice prohibits trainers from providing medical nutrition therapy or diagnosing injuries.
Client records should be kept confidential and secure, consistent with HIPAA and professional ethics.
Informed consent documents the client's understanding of risks and voluntary participation.
Professional liability insurance protects the trainer against claims of negligence.
Continuing education should be evidence-based and relevant to the trainer's practice.
The trainer should maintain a professional environment, including cleanliness, safety, and equipment checks.
Referral networks with physicians, physical therapists, and dietitians support comprehensive client care.
Basic and Applied Sciences (extended)
The nervous system's proprioceptors include muscle spindles (detect stretch) and Golgi tendon organs (detect tension).
The stretch reflex is initiated by muscle spindles; the GTO reflex inhibits muscle contraction to prevent injury.
The cardiorespiratory system's primary functions are to transport oxygen and nutrients and remove waste products.
The respiratory system's tidal volume, vital capacity, and residual volume describe lung volumes and capacities.
The endocrine system's hormones are classified as steroid or nonsteroid; steroid hormones cross cell membranes and alter gene expression.
The digestive system breaks down macronutrients into glucose, amino acids, and fatty acids for energy production.
The immune system's inflammatory response is part of tissue repair after exercise-induced muscle damage.
The integumentary system (skin) regulates temperature through sweating and vasodilation.
Assessment (extended)
The PAR-Q+ has seven general health questions; a 'yes' requires follow-up with a healthcare provider.
The medical history questionnaire collects information on medications, injuries, and chronic conditions.
Static posture assessment identifies deviations such as forward head, rounded shoulders, and anterior pelvic tilt.
The lateral view assesses spinal alignment, including lumbar lordosis and thoracic kyphosis.
The anterior view assesses symmetry of shoulders, hips, and knees.
The posterior view assesses the spine, scapulae, and calcaneal alignment.
The overhead squat assessment is performed with arms overhead and feet shoulder-width apart.
The single-leg squat assessment identifies ankle, knee, and hip stability deficits.
Program Design (extended)
The OPT model's stabilization phase uses 12-20 reps, 4/2/1 tempo, and 0-90 s rest.
The strength phase uses 1-12 reps, 2/0/2 tempo, and 0-60 s rest.
The power phase uses 1-10 reps, explosive tempo, and 0-60 s rest.
The hypertrophy phase uses 6-12 reps, 2/0/2 tempo, and 0-60 s rest.
The maximal strength phase uses 1-5 reps, 2/0/2 tempo, and 2-5 min rest.
The strength endurance phase uses 12-20 reps, 2/0/2 tempo, and 0-60 s rest.
Periodization divides training into macrocycles (annual), mesocycles (monthly), and microcycles (weekly).
The principle of variation (periodization) prevents plateaus and overtraining.
Exercise Technique and Training Instruction (extended)
The five phases of a resistance exercise are eccentric, isometric, concentric, isometric, and rest.
The eccentric phase should last at least 2 seconds for controlled movement.
The concentric phase should be performed with controlled speed, not momentum.
Spotting should be performed for exercises where the bar passes over the face or shoulders.
The spotter should be positioned to assist without interfering with the lifter's movement.
Breathing should be coordinated with movement: exhale on exertion, inhale on return.
The Valsalva maneuver should be avoided in clients with cardiovascular disease.
Proper footwear and a stable surface are essential for plyometric and balance exercises.
Client Relations and Behavioral Coaching (extended)
The transtheoretical model describes behavior change as a process, not a single event.
Self-efficacy is a strong predictor of exercise adherence.
Motivational interviewing is client-centered and directive, aiming to resolve ambivalence.
Open-ended questions encourage clients to explore their own reasons for change.
Reflective listening demonstrates empathy and clarifies the client's meaning.
Affirmations reinforce the client's strengths and past successes.
Summaries consolidate the client's statements and signal a transition.
SMART goals should be reviewed and revised as the client progresses.
Professional Development and Responsibility (extended)
The trainer's scope of practice is defined by certification and state law.
Referral to a healthcare provider is required when a client reports symptoms outside the trainer's scope.
Informed consent should be obtained before assessments and exercise programs.
Client confidentiality is both an ethical and legal obligation.
Professional liability insurance should cover the trainer's specific practice.
Continuing education ensures the trainer remains current with evidence-based practice.
Documentation of assessments and sessions supports continuity of care.
A professional referral network enhances client outcomes and the trainer's credibility.