NASM Certified Personal Trainer · Exercise Technique and Training Instruction
NASM Certified Personal Trainer: Flexibility, Core, and Balance Technique Concepts
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Overview
This chapter covers how to teach the first parts of a workout: foam rolling, stretching, core work, and balance work. These moves prepare the body, improve control, and are often where beginners start. The exam asks how each one is done and how to make it easier or harder.
Foam rolling, also called self-myofascial release, means pressing a tight or tender spot against a roller and holding there until it eases. Static stretching holds a muscle in a lengthened position without bouncing. Dynamic stretching moves joints through a full range with control, like walking lunges or arm circles, and is a good warm-up before activity.
Core work starts with keeping the spine still. A plank is a stabilization exercise because the trunk must stay steady while you hold it. The drawing-in maneuver pulls the belly button toward the spine, and bracing tightens all the trunk muscles at once.
Balance work gets harder when the base of support gets smaller or the surface gets less stable. Standing on two feet, then one foot, then one foot on a soft pad is a simple progression. Closing the eyes also makes balance harder.
Key concepts
Self-myofascial release (SMR)
Using a foam roller or ball to press on a tight or tender spot and hold until the tissue relaxes. It is often done before stretching to help tight areas let go.
Memory tipThink 'roll, find the sore spot, pause there' instead of rolling back and forth fast.
Static stretching
Moving a muscle to the point of mild tension and holding still there. There is no bouncing. It is used to lengthen muscles that are tight or overactive.
Memory tipStatic means 'standing still'. Hold, do not bounce.
Dynamic stretching
Moving the joints through their full range with controlled, repeated motion, such as leg swings or walking lunges. It warms the body up for activity.
Memory tipDynamic means 'moving'. It looks like a slow version of the workout itself.
Drawing-in maneuver
Pulling the belly button in toward the spine to switch on the deep core muscle (transverse abdominis) before or during an exercise.
Memory tipDrawing-in pulls IN. Bracing tightens all AROUND.
Bracing
Tightening all the trunk muscles at the same time, front, sides, and back, to make the spine stiff and steady, as if ready for a light punch to the stomach.
Memory tipBrace like you are about to be bumped in the belly.
Base of support
The area under the body that touches the ground, such as the space between the feet. A smaller or less stable base makes balance harder.
Memory tipTwo feet to one foot to soft pad: each step shrinks or softens the base.
Often tested
- Static stretching holds still; dynamic stretching moves. Watch for answers that mix them up.
- A plank is a stabilization exercise because the spine stays still.
- To progress balance, make the base smaller, the surface less stable, or close the eyes.
- Foam rolling should pause on tender spots rather than roll quickly over them.
Easy to confuse: Static vs. dynamic stretching
| Point | Static stretching | Dynamic stretching |
|---|---|---|
| How it looks | Hold one position | Controlled repeated movement |
| Bouncing | No | No (movement is controlled) |
| Common use | Lengthen tight muscles | Warm up before activity |
| Example | Holding a calf stretch | Walking lunges, leg swings |
3 sample questions
Verified practice questions from this unit.
Question 1. A trainer has a client hold steady pressure on a tender spot with a foam roller. What is this technique called?
- ① Dynamic stretching
- ② Self-myofascial release
- ③ Ballistic stretching
- ④ Reactive training
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Answer: ② Self-myofascial release
Key point: Foam rolling = self-myofascial release (SMR)
Foam rolling is called self-myofascial release (SMR). The client applies pressure to tight or tender soft tissue.
Wrong choices
- Dynamic stretching: Dynamic stretching is movement, not held pressure.
- Ballistic stretching: Ballistic stretching uses fast bouncing.
- Reactive training: Reactive training is fast, powerful movement such as jumps.
Question 2. Which stretching method uses controlled, repeated movement through the full range of motion, such as walking lunges with a reach?
- ① Static stretching
- ② Dynamic stretching
- ③ Ballistic stretching
- ④ Self-myofascial release
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Answer: ② Dynamic stretching
Key point: Dynamic stretching = controlled movement through range
Dynamic stretching moves the joints through their range of motion in a controlled way. It is often used to warm up.
Wrong choices
- Static stretching: Static stretching holds one position without moving.
- Ballistic stretching: Ballistic stretching uses bouncing momentum, not controlled movement.
- Self-myofascial release: This uses pressure from a roller or ball, not movement through a range.
Question 3. Which deep abdominal muscle is mainly trained by the drawing-in maneuver?
- ① Transversus abdominis
- ② Rectus abdominis
- ③ External obliques
- ④ Latissimus dorsi
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Answer: ① Transversus abdominis
Key point: Drawing-in trains the transversus abdominis
The drawing-in maneuver pulls the belly button gently toward the spine. It mainly activates the transversus abdominis, a deep muscle that helps stabilize the spine.
Wrong choices
- Rectus abdominis: The rectus abdominis is the outer 'six-pack' muscle.
- External obliques: The external obliques mainly rotate and bend the trunk.
- Latissimus dorsi: The latissimus dorsi is a large back muscle, not a deep core muscle.