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Restore depleted muscles on rest day with 12 hours of steady anabolic nourishment*

  • Reload muscles with key sport nutrients*
  • Extended-release muscle growth support*
  • Promotes strength, power + endurance*
Upgrade Yourself®with Performance Lab® SPORT Maintain

Upgrade your rest day: Return to action faster, bigger and stronger

Athletes who skip rest day sport nutrition miss a massive anabolic opportunity.

Research shows muscle growth lasts 24-48 hours after exercise, and that sport nutrients can amplify gains when taken every day, including rest day.

SPORT Maintain is an ultramodern rest day reloader + recharger that restores depleted muscle better than anything ever developed.

Take SPORT Maintain to stimulate and nourish anabolic activity for up to 12 hours on rest day. Return to your game bigger, faster and stronger.


How to take

Reload and recharge muscles on rest days with 3 capsules in the morning and a further 3 in the afternoon. Advanced athletes looking for enhanced recovery can safely take up to 10 daily capsules on non-training days. For best results take regularly and consistently, on an empty stomach.

Ultramodern Design

Maintain helps you be at your best in the gym, by being smarter during downtime. Combining cutting edge creatine, beta-alanine and iron innovations. In advanced forms and precise dosages. To deliver 100% clean, natural slow-release muscle rehab on your non-training days.

Easy to swallow

Easy to swallow

Maintain is delivered in easy-to-swallow 00-sized NutriCaps®. 100% plant-based capsules made from pullulan (fermented tapioca) that are ultraclean and naturally prebiotic-infused. For easy digestion and superior nutrient absorption into your body.

Designed for Performance

  • Restores depleted muscles with crucial sports nutrients on rest day*
  • Supports athletic strength, endurance and maximal muscle power output*
  • Enhances muscle growth and recovery with extended 12-hour nourishment*
  • Primes muscles for stronger athletic performance in your next session*

Healthy for Daily Use

  • Sports nutrition technology from Creapure pH10®, SR CarnoSyn®, NutriGenesis®
  • Helps with consistent daily muscle loading required for peak athletic performance*
  • Extended rest day nourishment for healthier muscle repair and growth*
  • Plant-based, prebiotic-infused NutriCaps® from pullulan (fermented tapioca)


Nutrition Facts

Serving Size: 6 NutriCaps®

Servings per container: 10

Per Serving
NutriGenesis® Iron+ 2.5 mg 14%
Creapure® pH10 (contains 94% Creatine
Monohydrate [83% Creatine])
3000 mg
SR CarnoSyn® Beta-Alanine 1600 mg
Daily Values are based on a 2,000 calories per day diet.
† NRV N/A.

Other Ingredients: NutriCaps® Pullulan Capsule, NuFlow® Rice Concentrate.

Suitable for vegans. Contains NO soy, egg, fish, shellfish, dairy, peanut, tree nuts, wheat, or other allergens. Non-GMO and non-irradiated. Free of gluten, synthetic additives, caffeine, artificial colors and preservatives.

Suggested Use: On rest days, take 3 capsules in the morning and 3 capsules in the afternoon on an empty stomach. For best results take consistently. For advanced usage guidelines visit www.performancelab.com/Advanced

NutriGenesis® and NutriCaps® are registered trademarks of Opti-Nutra Ltd.

Creapure® is a registered trademark of ALZCHEM AG.

Natural Alternatives International (NAI) is the owner of patents as listed on www.carnosyn.com and registered trademarks CarnoSyn® and SR CarnoSyn®.

BPA Free. Please Recycle.

The Science

Build Stronger Muscles Faster on Rest Day

Creatine and beta-alanine are top ergogenics that produce the greatest athletic performance enhancements when taken every day, including rest day. This regimen presents challenges:

  • Intense training depletes beta alanine and creatine from muscle tissues
  • Higher daily dosing may be linked to uncomfortable tingling and bloating
  • Stacking, dosing and timing of several supplements is inconvenient

Performance Lab® SPORT Maintain solves these muscle loading challenges on rest day with creatine and beta-alanine innovations – easy to take and stacked to perform.

Creapure® pH10 Creatine, 3000 mg

Creapure® pH10 Creatine

Creatine is an all-purpose muscle-builder that helps you return to the gym stronger.

SPORT Maintain Creapure® pH10 replenishes creatine muscle stores on rest days. Consistent daily supplementation is the best way to unlock creatine’s full ergogenic benefits, including:

  • Raising muscle ATP energy to power growth while recharging muscle for your next session;
  • Stimulating synthesis of proteins, stem cells and growth factor used to build muscle;
  • Modulating the oxidative stress and myostatin that can limit muscle repair and growth

SPORT Maintain maximizes all of these creatine benefits by keeping levels elevated in muscle tissues, supporting growth and repair while charging you up for your next high intensity session.

SPORT Maintain Creapure® pH10 is a quality 99.5% pure form of pH-balanced creatine monohydrate that enhances bioavailability while reducing creatine bloating and gastric distress.

SR CarnoSyn® Beta-Alanine, 1600 mg

SR CarnoSyn® is advanced Beta-Alanine: An overall pre- and post-workout muscle booster that works by raising muscle carnosine.

Consistent muscle carnosine loading is one of the most important sports nutrition practices because it supports both muscle recovery and subsequent muscle performance:


SR CarnoSyn® muscle recovery support

  • Antioxidant activity to neutralize exercise-induced, muscle-damaging free radicals;
  • Inhibits protein-damaging advanced glycation end-products (AGEs);
  • Acts as a muscle-alkalizing pH regulator, buffering impact of muscle-damaging acids

SR CarnoSyn® muscle performance support

  • Increases the working capacity of muscle across all strength and endurance activities;
  • Delays muscle failure by reducing acidosis and boosting muscle buffering capacity;
  • Boosts overall muscle strength and endurance

SPORT Maintain SR CarnoSyn® is innovative sustained-release (SR) Beta-Alanine that gradually raises and maintains muscle carnosine for 12 hours of steady anabolic nourishment on rest day. SR CarnoSyn® remains in the body longer for peak loading and higher dosing without Beta-Alanine tingling discomfort.

SPORT Maintain + SPORT Pre + SPORT Post is your convenient solution for getting the consistent daily beta alanine and creatine intake shown to produce the best muscle benefits in human research.

Pre, Post, and Maintain

NutriGenesis® Iron, 2.5 mg

The harder you train, the more you need iron: Exercise reduces iron absorption while accelerating iron loss through sweat.

Low iron limits red blood cells’ oxygen transport ability – potentially leading to reduced exercise capacity, fatigue and sub-par overall physical performance.

  • Researchers have suggested that iron supplementation helps improve performance across athletic strength, endurance and maximal muscle power output.

SPORT Maintain NutriGenesis® iron is complexed with a matrix of absorption-enhancing cofactors – making it easy for athletes to restore and sustain ideal iron levels required for peak performance.

Nutrigenesis Icon

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Performance Lab® SPORT Maintain

Ready to upgrade your rest day? Take SPORT Maintain to promote faster recovery and bigger growth during downtime and stronger performance in your next session.

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Who should take Performance Lab® SPORT Maintain?

SPORT Maintain is an ideal rest day supplement for anyone seeking the greatest gains from their strength training program.

How do I take Performance Lab® SPORT Maintain?

On rest days, take 3 capsules in the morning and 3 capsules in the afternoon on an empty stomach. Take SPORT Maintain consistently.

For best results, take SPORT Maintain with SPORT Pre and SPORT Post. Designed to stack together, SPORT Maintain + SPORT Pre + SPORT Post is the world’s most convenient solution for getting the consistent daily beta alanine + creatine intake shown to produce the best muscle benefits in human clinical research.

Is Performance Lab® SPORT Maintain safe?

Like other Performance Lab® supplements, SPORT Maintain is designed to be safe for long-term daily use, without the need for cycling. SPORT Maintain achieves this by using pure, potent ingredients that are dosed appropriately and in line with clinical research. SPORT Maintain’s clean formula design – free of GMOs, gluten, soy, colorants, preservatives and other additives – is also well-tolerated by the body, and safe for long-term use. SPORT Maintain avoids the use of caffeine and stimulants, further strengthening its safety and tolerability profile.

What is NutriGenesis®?

NutriGenesis® is a Performance Lab® nutrition technology innovation: Vitamins, minerals and amino acids grown in live cultures at our state-of-the-art lab.

A true biological nutrient form, NutriGenesis® closely mirrors the molecular structure of food nutrients. NutriGenesis® nutrients offer significant advantages over standard nutrient forms.

Featured in several Performance Lab® formulas, NutriGenesis® vitamins, minerals and amino acids are bioengineered to be safe, active and highly effective for overall health and performance.

Why did Performance Lab® develop NutriGenesis®?

Vitamins, minerals and amino acids are the most important nutrients you need to build a strong foundation for health and performance.

Performance Lab® developed NutriGenesis® to have our own in-house vitamins, minerals and amino acids to use in our own nutritional supplements.

In producing NutriGenesis®, Performance Lab® can best maintain our industry-leading quality standards for cleanliness, purity, effectiveness and eco-friendliness, across all our ultramodern formulas.

How is NutriGenesis® different from other nutrient forms?

Not all vitamins, minerals and amino acids are the same. There are many nutrient forms, produced with a variety of processes. Some of the most popular nutrient forms available in supplements today include:

Whole Food Concentrates

Whole food vitamin and mineral supplements are sourced from fruits, vegetables, herbs and mushrooms. They include natural cofactors that make food nutrients so easy for the body to absorb and utilize. However, they do require extensive processing and may be made with GMOs, mass agriculture and dirty eco-destructive practices.

Isolated Chemical (USP) Nutrients

Isolated Chemical (USP) is the cheapest vitamin and mineral form found in the most basic multivitamin supplements. This synthetic form chemically alters vitamins and minerals, isolating them from their whole-food cofactors. As a result, Isolated Chemical (USP) nutrients are typically harder to absorb and less effective than whole food nutrients.

Chelated Minerals

In this process, a mineral nutrient (such as iron, calcium, zinc) is bound with a chelator: An organic molecule (often an amino acid) that is large enough to enrobe the mineral. By surrounding the mineral, the chelator protects it against degradation. Chelated nutrients are highly stable and may improve nutrient uptake and utilization.

NutriGenesis® is different from traditional nutrient forms: Bioengineered to be better.

NutriGenesis® are cultured nutrients that replicate the creation of vitamins, minerals and aminos in nature.

NutriGenesis® is based on the work of Nobel Prize-winning physiologist Albert Szent Gyorgy, who theorized that nutrients presented in their naturally grown forms supply cofactors that make them more bioavailable, biologically active and effective than nutrients that are isolated.

In the NutriGenesis® process, single-cell organisms (Lactobacillus probiotics and brewer’s yeast) are seeded with micronutrients in a hydroponic growth medium.

The live single-cell organisms “eat” the micronutrients, divide and thrive. As the cultures grow, they produce fresh new NutriGenesis® vitamins, minerals and aminos within a matrix of natural cofactors. This familiar structure is more easily absorbed and utilized by the body.

More on the NutriGenesis® Process

NutriGenesis® advantages over other forms:

NutriGenesis® is essentially food nutrition. Mirroring food nutrients molecule-by-molecule, our vitamins, minerals and aminos are presented in pure elemental form. Maximum nutrition: Nothing more, nothing less.

Enhanced effectiveness. Because NutriGenesis® nutrients are in food-matrix form, they are recognized by the body as nature-identical -- maximizing nutrient uptake, bioavailability and beneficial activity.

Patented and researched. The patented process behind NutriGenesis® has been shown in research to enhance nutrient absorption and retention (when compared to chemical isolates).

Cleaner and safer. NutriGenesis® is produced in a sterile, tightly controlled lab setting. NutriGenesis® is minimally processed, requiring no pesticides, herbicides or other synthetics associated with some other whole-food nutrients.

Better for the planet: The NutriGenesis® process is clean and efficient, with little carbon footprint or environmental impact – especially when compared to factory farming for phytonutrients and strip mining for minerals.

Which formulas feature NutriGenesis® nutrients?

It all begins with NutriGenesis® Multi for Men and Multi for Women: Performance Lab®’s multivitamin starting point for human performance optimization.

NutriGenesis® vitamins, minerals and amino acids are also found in Performance Lab® formulas Stim, Flex, BCAA, Pre, Post and Maintain.

Beyond Performance Lab®, NutriGenesis® B-Vitamins are found in Mind Lab Pro®: the Universal Nootropic™.

30-Day Performance Promise

Your first order of any Performance Lab® product is covered by our 30-day performance promise.

Put Performance Lab® Maintain to the test for a full 30 days and if you don’t see results, we’ll refund your money. No questions asked.

Simply get in touch with a member of our Customer Care team.

The Performance Lab® Performance Promise covers one container of any of our products, up to a maximum of three products per order. You’ll need to return any unused boxes.

SPORT Maintain stacks well with…

Maintain + Post

SPORT Post is taken immediately after exercise to restore muscles.

SPORT Maintain picks up where SPORT Post leaves off, steadily nourishing muscle growth over 12 hours on rest day.

Take SPORT Maintain + SPORT Post to raise and sustain ideal muscle levels of SR CarnoSyn® beta alanine and Creapure® pH10 creatine.

SPORT Maintain + SPORT Post feed and restore muscle from the moment you finish your session through rest day.

Learn More

Maintain + Carb

Carbs increase creatine absorption into muscle. Adding SPORT Carb maximizes SPORT Maintain creatine muscle-loading on rest day, while also fueling muscle for energy-intensive growth and repair.

Take SPORT Maintain + SPORT Carb together to strengthen your support for rest day recharging and ultimate muscle gains.

Learn More

Maintain + Sleep

Sleep amplifies SPORT Maintain rest day gains by extending your deepest, most regenerative sleep phases.

Together, SPORT Maintain + Sleep maximize the profound athletic benefits of rest day, helping you to return to action stronger, healthier and energized to perform.

Learn More


The research and studies behind Performance Lab® SPORT Maintain.

Learn More

Beta Alanine


Deldicque L, et al. Increased IGF mRNA in human skeletal muscle after creatine supplementation. Med Sci Sports Exerc. 2005 May;37(5):731-6.
Deldicque L, Atherton P, Patel R, Theisen D, Nielens H, Rennie M, Francaux M: Effects of resistance exercise with and without creatine supplementation on gene expression and cell signaling in human skeletal muscle. J Appl Physiol. 2008, 104: 371-378
Willoughby DS and Rosene J. Effects of oral creatine and resistance training on myosin heavy chain expression. Med Sci Sports Exerc. 2001 Oct;33(10):1674-81.
Kim J, et al. Role of creatine supplementation in exercise-induced muscle damage: A mini review. J Exerc Rehabil. 2015 Oct; 11(5): 244–250.
Branch JD. Effect of creatine supplementation on body composition and performance: a meta-analysis. Int J Sport Nutr Exerc Metab. 2003 Jun;13(2):198-226
Juhn MS, Tarnopolsky M. Oral creatine supplementation and athletic performance: a critical review. Clin J Sport Med 8: 286–297, 1998
Bassit RA, Pinheiro CH, Vitzel KF, Sproesser AJ, Silveira LR, Curi R: Effect of short-term creatine supplementation on markers of skeletal muscle damage after strenuous contractile activity. Eur J Appl Physiol. 2010, 108: 945-955.

Creatine + Carb

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