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NASM Certified Personal Trainer · Program Design

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NASM Certified Personal Trainer The OPT Model and Its Phases Summary

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About 8 of 20 Program Design questions (40%)

The five phases of the Optimum Performance Training (OPT) model and who should use each.

The OPT Model and Its Phases: must-know points

  • The OPT model has 5 phases in 3 levels: stabilization, strength, and power.
  • Phase 1 is Stabilization Endurance and suits most beginners.
  • Phase 3 builds muscle size; Phase 4 builds maximal strength with 1 to 5 reps and long rests.
  • Phase 5 pairs a strength exercise with a power exercise.

The OPT Model and Its Phases: 10 sample questions

Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 1. How many phases are in the NASM OPT model?

  1. ① Three
  2. ② Four
  3. ③ Six
  4. ④ Five
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Answer: ④ Five

Key point: OPT model: 5 phases in 3 levels

The OPT model has five phases: Stabilization Endurance, Strength Endurance, Muscular Development, Maximal Strength, and Power. They are grouped into three levels: stabilization, strength, and power.

Wrong choices

  • Three: There are three levels, but five phases.
  • Four: The model has one more phase than this.
  • Six: The model has one fewer phase than this.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 2. Which is Phase 1 of the OPT model?

  1. ① Strength Endurance
  2. ② Muscular Development
  3. ③ Stabilization Endurance
  4. ④ Maximal Strength
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Answer: ③ Stabilization Endurance

Key point: OPT Phase 1 = Stabilization Endurance

Phase 1 is Stabilization Endurance. It builds control, balance, and muscle endurance and is the starting point for most beginners.

Wrong choices

  • Strength Endurance: This is Phase 2.
  • Muscular Development: This is Phase 3.
  • Maximal Strength: This is Phase 4.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 3. A beginner with poor posture and poor balance is most likely to start in which OPT phase?

  1. ① Phase 3
  2. ② Phase 4
  3. ③ Phase 1
  4. ④ Phase 5
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Answer: ③ Phase 1

Key point: Beginners usually start in Phase 1

A client with poor posture and balance needs to build control and stability first. That is the goal of Phase 1.

Wrong choices

  • Phase 3: This is for clients who already have a base of control and strength.
  • Phase 4: This uses heavy loads and is too advanced.
  • Phase 5: This uses fast, powerful movements and is too advanced.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 4. Which OPT phase has the main goal of increasing muscle size?

  1. ① Muscular Development
  2. ② Stabilization Endurance
  3. ③ Maximal Strength
  4. ④ Power
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Answer: ① Muscular Development

Key point: Phase 3 = Muscular Development (hypertrophy)

Phase 3 is Muscular Development, also called hypertrophy. It uses moderate loads and higher volume to increase muscle size.

Wrong choices

  • Stabilization Endurance: This phase focuses on control and endurance.
  • Maximal Strength: This phase focuses on lifting heavy loads.
  • Power: This phase focuses on speed and force.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 5. What is the typical repetition range for Phase 4, Maximal Strength?

  1. ① 12 to 20 repetitions
  2. ② 8 to 12 repetitions
  3. ③ 1 to 5 repetitions
  4. ④ 6 to 12 repetitions
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Answer: ③ 1 to 5 repetitions

Key point: Maximal strength: 1-5 reps

Phase 4 uses heavy loads for low reps, about 1 to 5. This builds the ability to produce high force.

Wrong choices

  • 12 to 20 repetitions: This is the Phase 1 range.
  • 8 to 12 repetitions: This is closer to Phase 2.
  • 6 to 12 repetitions: This is the Phase 3 range.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 6. What is the typical repetition range for Phase 1, Stabilization Endurance?

  1. ① 1 to 5 repetitions
  2. ② 30 to 50 repetitions
  3. ③ 5 to 8 repetitions
  4. ④ 12 to 20 repetitions
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Answer: ④ 12 to 20 repetitions

Key point: Phase 1 = 12 to 20 reps

Phase 1 uses lighter loads and higher repetitions, usually 12 to 20, with slow tempo.

Wrong choices

  • 1 to 5 repetitions: 1 to 5 is the range for maximal strength.
  • 30 to 50 repetitions: 30 to 50 is far more than Phase 1 uses.
  • 5 to 8 repetitions: 5 to 8 is too heavy for Phase 1.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★★

Question 7. Which describes Phase 2, Strength Endurance, of the OPT model?

  1. ① Pairing a strength exercise with a stabilization exercise
  2. ② Pairing a strength exercise with a power exercise
  3. ③ Only one heavy lift with a very long rest
  4. ④ Only balance exercises with bodyweight
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Answer: ① Pairing a strength exercise with a stabilization exercise

Key point: Phase 2 = strength + stabilization superset

Phase 2 uses supersets that pair a strength exercise with a stabilization exercise, such as a chest press then a push-up.

Wrong choices

  • Pairing a strength exercise with a power exercise: This describes Phase 5.
  • Only one heavy lift with a very long rest: This describes Phase 4.
  • Only balance exercises with bodyweight: This describes Phase 1.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★☆

Question 8. Which list shows the three levels of the OPT model in order?

  1. ① Stabilization, strength, power
  2. ② Power, strength, stabilization
  3. ③ Strength, power, stabilization
  4. ④ Stabilization, power, strength
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Answer: ① Stabilization, strength, power

Key point: OPT levels: stabilization, strength, power

The OPT model moves from the stabilization level to the strength level and then to the power level.

Wrong choices

  • Power, strength, stabilization: This is the reverse order.
  • Strength, power, stabilization: Strength comes after stabilization, not first.
  • Stabilization, power, strength: Power is the last level, not the second.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★☆

Question 9. Phase 4 of the OPT model belongs to which level?

  1. ① Stabilization level
  2. ② Power level
  3. ③ Strength level
  4. ④ Corrective level
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Answer: ③ Strength level

Key point: Strength level = Phases 2, 3, and 4

The strength level has Phase 2 (Strength Endurance), Phase 3 (Muscular Development), and Phase 4 (Maximal Strength).

Wrong choices

  • Stabilization level: Stabilization contains Phase 1.
  • Power level: Power contains Phase 5.
  • Corrective level: This is not a level of the OPT model.
Practice questionReviewedProgram Design › The OPT Model and Its Phases★★★★☆

Question 10. Which OPT phase pairs a strength exercise with a power exercise?

  1. ① Phase 5, Power
  2. ② Phase 2, Strength Endurance
  3. ③ Phase 3, Muscular Development
  4. ④ Phase 4, Maximal Strength
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Answer: ① Phase 5, Power

Key point: Phase 5 pairs strength + power exercises

In Phase 5, a strength exercise is paired with a power exercise, such as a heavy press followed by a medicine ball throw.

Wrong choices

  • Phase 2, Strength Endurance: Phase 2 pairs a strength exercise with a stabilization exercise.
  • Phase 3, Muscular Development: Phase 3 uses mostly hypertrophy sets.
  • Phase 4, Maximal Strength: Phase 4 focuses on heavy loads with long rests.

Test yourself.

The OPT Model and Its Phases: 5 questions →Program Design: 5 questions →