Category: Features

Endurance athletes know that performance isn’t just about training—it’s about how the body manages fatigue, muscle damage, and recovery. Katsuo Stamina is the first Japanese-engineered supplement to combine clinical validation with real-world race results, offering athletes a measurable edge.

Race-Backed Performance Data

Dr. Takeshi Oomichi, a Japanese sports physician and marathoner, demonstrated the impact of Katsuo Stamina across multiple events:

Key highlight: Both marathons were run with negative splits, a gold standard of endurance pacing.

Biochemical Evidence: Muscle Protection

The science behind Katsuo Stamina lies in its ability to reduce muscle damage markers:

• Creatine Phosphokinase (CPK), a key enzyme released when muscle fibers are damaged, dropped significantly:
  • Without Katsuo Stamina: ~1000 IU/L
  • With Katsuo Stamina: ~600 IU/L

This ~40% reduction indicates less muscle trauma, faster recovery, and the ability to sustain higher training loads.

Mechanism of Action

Katsuo Stamina’s core ingredient is Migratory Fish Extract, a peptide composed of β-alanine and methylhistidine. Together, they:

• Buffer lactic acid → delaying fatigue during long efforts.
• Protect muscle fibers → reducing micro-tears and soreness.
• Accelerate recovery → enabling consistent training blocks.

Nutritional profile (per 4 tablets, 1.6 g):

• Energy: 6.29 kcal
• Protein: 0.49 g
• Carbohydrates: 1.06 mg
• Sodium: 0.006 mg

Industry Credibility

• Dual certification: Katsuo Stamina is Asia’s first endurance supplement to pass Informed-Sport and Informed-Choice non-doping certifications.
• Adoption trend: Endurance coaches and sports physicians are increasingly recommending functional supplements to bridge the gap between training and recovery.

Why It Matters

For athletes chasing PRs, podiums, or simply more durable training, Katsuo Stamina offers dual validation:

• Race outcomes (negative splits, faster times)
• Medical data (lower CPK, reduced muscle damage)

This isn’t marketing hype—it’s measurable science applied to endurance performance.

Katsuo Stamina is not just a supplement; it’s a performance system that combines clinical safety, biochemical efficacy, and proven race-day results.

[vc_row][vc_column][vc_column_text]Enabling the Next Challenge in a Short Period of Time

An ideal recovery would be a quick, shortened period with maximum efficiency. The key is to recover from bodily damage in the shortest possible time. Anserine, the active ingredient in Katsuo Stamina, is the key to such an efficient recovery, and can be consumed before, during and after a race.

What is Delayed Onset Muscle Pain?

Intense exercise causes microscopic damage to muscle fibers, resulting in inflammation and pain. Delayed onset muscle pain peaks 24 to 48 hours after exercise, and can last for several days.

Charge Up: the Resilience of the Katsuo Fish

When engaging in long-distance endurance sports, muscles experience temporary fatigue and weakness. After a period of time, the fatigue disappears and strength is recovered. The shortened recovery period allows one to start the next training session or race with rejuvenated musculature more quickly. The graph on the right shows the results of an actual survey in this regard. As can be seen, the muscles recover from fatigue to proper function more quickly. The total amount of training can be increased; performance can be improved.

Survey Results

We conducted a survey of users of Katsuo Stamina. We asked testers to describe their past and current recovery periods under the following conditions: while running the same distance (or close approximation thereof), cumulative elevation while running, and exercise intensity.

Katsuo Stamina Survey Statistics

Sports Events: Marathon (42km), Trail Run (50km, 80km, 100km)

Answer Period: June 1 – July 15, 2016

Number of Responses: Total 68[/vc_column_text][/vc_column][/vc_row]