Author Recognition

This article is adapted from a Diploma Kemahiran Malaysia (DKM) research project conducted by Siew Chew Nee under the Therapeutic Massage Therapy programme (NOSS MP-082-4:2012). The study was supervised by Mr. Low Chee Kiat and completed in March 2026.

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Recognition of Tim Bodycare (Penyelaras)

This research aligns with professional therapeutic practices emphasized by Tim Bodycare Training Centre, which promotes structured, evidence-based recovery methods. The study reflects real-world applications of advanced soft tissue techniques such as IASTM (fascia knife), commonly taught and practiced in professional massage therapy settings.

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Abstract

Muscle soreness, particularly Delayed Onset Muscle Soreness (DOMS), is a common condition experienced by recreational gym members after intense or unfamiliar exercise. While it is a natural physiological response, excessive soreness can negatively impact motivation, performance, and training consistency.

This study evaluates the effectiveness of Instrument-Assisted Soft Tissue Mobilization (IASTM), also known as the fascia knife technique, in reducing muscle soreness compared to static stretching. Using a quantitative experimental design, 30 participants were divided into two groups: IASTM intervention and static stretching.

The results demonstrate that IASTM significantly reduces muscle soreness more effectively and consistently than static stretching, making it a highly effective recovery method for recreational gym populations.

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Introduction

Muscle soreness, especially Delayed Onset Muscle Soreness (DOMS), typically occurs 24–72 hours after exercise and is caused by microtrauma to muscle fibers due to eccentric loading.

Symptoms include:

• Muscle stiffness
• Reduced strength
• Limited range of motion
• Pain during movement

Although DOMS is not an injury, it can significantly reduce exercise consistency and motivation, especially among recreational gym users.

Traditional recovery methods such as stretching and foam rolling are widely used. However, newer techniques like Instrument-Assisted Soft Tissue Mobilization (IASTM) have gained attention. This method uses specialized tools (fascia knives) to apply controlled pressure to soft tissues, helping to:

• Release fascial adhesions
• Improve blood circulation
• Stimulate tissue repair
• Reduce muscle tension

Despite its growing popularity, research on recreational gym populations has been limited — which this study aims to address.

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Methodology

The study used a quantitative experimental design with pre-test and post-test analysis.

Participants

• 30 recreational gym members
• Age: 21–40 years
• Equal gender distribution (50% male, 50% female)

Group Division

• Experimental Group (15): IASTM (fascia knife)
• Control Group (15): Static stretching

Procedure

• Exercises: squat, deadlift, lunges (to induce DOMS)
• Duration: 5 treatment sessions within 8 weeks
• Measurement tool: Visual Analogue Scale (VAS) (0–10 pain scale)

Intervention

• IASTM:
  • Fascia knife at 30°–60° angle
  • 8–10 strokes per muscle
  • Targets: quadriceps, hamstrings, glutes
• Static Stretching:
  • 15–30 seconds per stretch
  • 3 sets per muscle

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Findings

1. Baseline Muscle Soreness

Participants reported moderate to high soreness (VAS 4–8) after exercise, confirming DOMS presence.

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2. Faster Pain Reduction with IASTM

From the data table (page 18–20):

• IASTM group showed steady decrease to VAS 0–2
• Static stretching group remained at VAS 2–7

👉 This shows faster and deeper recovery with fascia knife

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3. Mean Difference (Key Result)

From Table on page 20–21:

👉 IASTM is 5x more effective in reducing muscle soreness

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4. Consistency of Results

From standard deviation chart (page 22):

• IASTM variability decreased (1.23 → 0.82) → more consistent recovery
• Stretching variability increased (1.15 → 1.26) → inconsistent results

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5. Statistical Significance

From paired t-test (page 23):

• IASTM: t(14) = 20.92, p < 0.001
• Stretching: t(14) = 5.92, p < 0.001

👉 Both work, but IASTM is significantly stronger

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Discussion

The findings clearly show that IASTM is superior to static stretching for managing DOMS.

Why it works better:

• Increases blood flow → faster healing
• Breaks down fascial restrictions
• Reduces muscle stiffness
• Enhances tissue remodeling

Unlike stretching, which mainly improves flexibility, IASTM directly targets soft tissue dysfunction, making recovery more effective.

Another key insight is the cumulative effect:

• Each session produced progressive improvement
• Strongest results appeared after repeated treatments

This shows that recovery is not instant — consistency matters.

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Conclusion

This study confirms that Instrument-Assisted Soft Tissue Mobilization (IASTM) using a fascia knife is a highly effective recovery method for reducing muscle soreness among recreational gym members.

Compared to static stretching, IASTM:

• Reduces pain significantly faster
• Produces more consistent results
• Enhances overall recovery quality

As a non-invasive and evidence-based technique, it is highly recommended for integration into fitness recovery programs, sports therapy, and professional massage practice.