Study Finds Arginine and Pomegranate Juice Drink Enhances Male Endurance

Natural Ingredients as Power Beverages

A recent study has shown that a drink combining arginine and pomegranate juice can significantly improve endurance levels in men during and after exercise. This discovery suggests that natural compounds without added sugars may serve as effective energy-boosting beverages.

The Role of Arginine

Arginine is a naturally occurring amino acid found in high concentrations in watermelon, a popular summer fruit. When synthesized by the body, arginine enhances blood flow and aids in muscle repair following exercise, among other benefits.

Research Overview

Researchers from three Spanish universities conducted a study published in the *Journal of Agricultural and Food Chemistry* in May 2017. The study examined the effects of a watermelon and pomegranate juice mixture on high-intensity exercisers, aiming to determine its impact on performance levels.

Study Design and Participant Criteria

The four-week study involved 19 healthy male participants with an average age of 24. Key metrics such as stretching ability and body mass index (BMI) were assessed, and blood samples were collected at the beginning of the study.

Participants were required to adhere to specific conditions, including abstaining from alcohol and caffeine for 24 hours before and after physical tests. They also needed to have engaged in a resistance-training regimen for at least four years and avoid exhaustive training two days before evaluations.

Experimental Procedure

The researchers designed a one-day physical regimen and provided participants with three specially prepared watermelon juice blends and a placebo. The options included plain watermelon juice, watermelon juice enhanced with arginine, and a combination of watermelon juice infused with pomegranate concentrate and arginine.

Each participant consumed 200 ml (approximately 4/5 of a cup) of one of the beverages once a week. After a 60-minute period of warming up with cycling and stretching, they performed calibrated weightlifting exercises in a half-squat position. A week passed between each evaluation session.

Findings and Implications

After completing the exercise sessions, the researchers measured the participants’ physical indices, perceived exertion levels, muscle soreness, and collected additional blood samples. The results indicated that the combination of watermelon and pomegranate juice led to the highest sustained energy and exercise levels, as well as lower heart rates and blood pressure. Participants also reported less muscle soreness in their limbs.

The researchers attributed these benefits to the antioxidant and anti-inflammatory properties of pomegranate, which help individuals recover quickly after intense exercise. The combination of pomegranate concentrate with arginine resulted in a nearly 3% average increase in peak performance levels.

Study Limitations and Future Directions

The researchers acknowledged a significant limitation: they did not test a beverage containing pomegranate concentrate without arginine. Additionally, they noted that the results might not be applicable to women. They recommended that manufacturers consider natural ingredients rather than relying on sugary, artificially colored drinks to promote endurance and energy.

Written by Susan Mercer Hinrichs, MA, MBA, CPhT
Reference: Consumption of Watermelon Juice Enriched in L-Citrulline and Pomegranate Ellagitannins Enhanced Metabolism during Physical Exercise
Authors: Ascension Martinez-Sanchez; Fernando Alacid; Jacobo A. Rubio-Arias; Barbara Fernandez-Lobato; Domingo J. Ramos-Campo; Encarna Aguayo