Meat Texture Analysis — Tenderness, Chewiness & Warner-Bratzler Shear Force

Objective meat tenderness measurement with Warner-Bratzler shear force — precision and reproducibility that sensory panels cannot achieve consistently.

Why Objective Meat Texture Testing Matters

Consumer complaints about tough meat are the #1 texture-related quality issue in meat processing. Yet tenderness evaluation by trained sensory panels costs $500–$2,000 per session and varies between panelists by ±15–25%.

CV < 8%

Reproducibility between replicate measurements (vs. 15–25% for sensory panels)

30–60 samples/hr

Testing throughput (vs. 4–6 per sensory session)

< $5/sample

Cost in consumables (vs. $40–100 per sample for trained panels)

Warner-Bratzler Shear Force (WBSF) Test

The Warner-Bratzler Shear Force test is the gold standard for beef tenderness measurement, endorsed by the American Meat Science Association (AMSA).

Test Protocol (AMSA 2015 Guidelines)

Parameter	Specification
Sample	1.0 cm diameter core, cut parallel to fiber direction
Cooking method	Water bath at 71°C internal temperature (rare to medium)
Sample temperature at test	Chilled to 4°C after cooking and overnight rest
Blade	V-slot Warner-Bratzler blade (60° V-notch, slot width 3.0mm)
Cross-head speed	200 mm/min (3.3 mm/s)
Trigger force	0.1 N
Measurement	Peak shear force (N or kgf)
Replicates	6–8 cores per sample minimum

WBSF Tenderness Classification (Beef)

WBSF Value	Tenderness Category	Consumer Perception
< 22 N (2.24 kgf)	Very Tender	"Extremely tender" (85%+ satisfaction)
22–32 N	Tender	"Tender" (70%+ satisfaction)
32–45 N	Slightly Tough	"Acceptable" (50–70% satisfaction)
45–60 N	Tough	"Tough" (<50% satisfaction)
> 60 N	Very Tough	"Very tough" (<20% satisfaction)

Source: AMSA, Meat Science Research Review 2015

Meat TPA — Chewiness & Cohesiveness

For processed meats (sausage, ham, frankfurters, meatballs), TPA provides a more complete texture profile than shear force alone.

TPA Protocol for Processed Meat

Parameter	Value
Sample	20mm diameter × 20mm height cylinder, cut across fiber
Probe	P/25 or P/50 flat platen
Test speed	2.0 mm/s
Compression strain	70%
Wait between compressions	5 seconds
Temperature	20°C

Key TPA Parameters for Meat Products

Product	Hardness (N)	Cohesiveness	Chewiness (N·mm)
Frankfurter	15–30	0.55–0.70	8–18
Bologna	20–40	0.50–0.65	10–22
Cooked ham (whole muscle)	35–70	0.45–0.60	15–35
Chicken breast (roasted)	25–55	0.35–0.55	8–25
Fish fillet (baked)	8–20	0.40–0.60	3–10

Penetration Test for Fish & Poultry

For fish fillets and poultry products where coring is difficult, needle or cylindrical probe penetration measures firmness directly.

Probe	P/5 cylinder or 2mm needle
Speed	1.0 mm/s
Penetration	8mm depth
Sample	5 locations per fillet

Applications

•Fresh fish quality grading at receiving inspection
•Poultry marination monitoring (firming/softening)
•Surimi (imitation crab) and fish cake firmness
•Shrimp texture during processing and shelf-life

Meat Texture Applications by Product Type

Fresh Beef (WBSF)

Warner-Bratzler shear force classifies carcasses for retail grade. Testing cores from multiple muscle locations identifies tough spots for trimming or further processing decisions.

Processed Meat (TPA)

Frankfurters, bologna, and sausages need consistent texture batch-to-batch. TPA monitors hardness and cohesiveness against specification limits. Outlier batches identified before packing.

Poultry Processing QC

Marination injection uniformity affects cooked breast texture. Texture analysis at incoming and after cooking shows whether marination achieved consistent firmness reduction targets.

Seafood

Texture is a primary fresh-fish quality indicator. A penetration force above threshold = fresh; below threshold = partially degraded. The TA-Pro 200 handles delicate fish texture without overranging.

Alternative Proteins (Plant-Based)

Meat analogs must match the TPA profile of the protein they replace. Texture analysis of competitive products establishes target ranges, and reformulation testing tracks ingredient changes.

Frequently Asked Questions

How is meat tenderness measured objectively?+

The Warner-Bratzler Shear Force (WBSF) test is the AMSA-endorsed standard. A 1cm diameter core is cut parallel to muscle fibers, cooked to 71°C internal temperature, chilled, and sheared through the V-slot blade at 200mm/min. Peak shear force (N) is the WBSF value. Values below 32N classify beef as "tender."

What is the Warner-Bratzler shear force test?+

WBSF uses a V-shaped slot blade (60° notch, 3mm slot width) to shear a cylindrical meat core. As the core is pulled through the slot, the force increases until the meat fibers sever — this peak force is the WBSF value. The test is standardized by AMSA and widely accepted in academic publications, USDA grading, and packer specifications.

Can a texture analyzer replace sensory evaluation for meat?+

Instrumental texture analysis replaces sensory evaluation for tenderness (WBSF correlates with panel tenderness scores at r = 0.70–0.85). However, flavor, juiciness, and overall acceptability require sensory panels. For QC decisions where tenderness is the primary criterion, instrumental testing is faster, cheaper, and more consistent.

What probe is used for meat texture testing?+

For WBSF: the V-slot Warner-Bratzler blade (WB/BS). For TPA: P/25 or P/50 flat platens. For fish penetration: P/5 cylinder or 2mm needle. For diced meat: TA/KSB Kramer shear cell. All are included in the TA-Pro standard 50+ probe kit.

How do you prepare meat samples for texture analysis?+

For WBSF: cook to 71°C internal temperature using a water bath, rest overnight at 4°C, then core 1cm diameter cylinders parallel to fiber direction. Remove all visible connective tissue and fat from cores. Test 6–8 cores per sample for statistical validity. For TPA: cut 20mm × 20mm cylinders perpendicular to fiber direction.

Measure Meat Tenderness with the TA-Pro

The TA-Pro 200 includes the Warner-Bratzler blade, P/25 platen, and pre-loaded WBSF and TPA methods — pre-configured to AMSA specifications.

Request a Quote →View TA-Pro Specifications →