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.
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.
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.
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:
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:
Despite its growing popularity, research on recreational gym populations has been limited — which this study aims to address.
The study used a quantitative experimental design with pre-test and post-test analysis.
Participants reported moderate to high soreness (VAS 4–8) after exercise, confirming DOMS presence.
From the data table (page 18–20):
π This shows faster and deeper recovery with fascia knife
From Table on page 20–21:
| Group | Before | After | Reduction |
|---|---|---|---|
| IASTM | 5.67 | 0.67 | 5.00 |
| Stretching | 5.80 | 4.80 | 1.00 |
π IASTM is 5x more effective in reducing muscle soreness
From standard deviation chart (page 22):
From paired t-test (page 23):
π Both work, but IASTM is significantly stronger
The findings clearly show that IASTM is superior to static stretching for managing DOMS.
Unlike stretching, which mainly improves flexibility, IASTM directly targets soft tissue dysfunction, making recovery more effective.
Another key insight is the cumulative effect:
This shows that recovery is not instant — consistency matters.
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:
As a non-invasive and evidence-based technique, it is highly recommended for integration into fitness recovery programs, sports therapy, and professional massage practice.
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