SFuels ZONE 4 mixes multiple fuel-substrates, including maltodextrin-cyclic dextrin, plus SFuels exclusive Extended-Substrate (TM) Glutamine/C8-C10 MCT for stable consistent energy, gut resilience, and reduced muscle soreness.
The higher-intensity training (and racing) zones (Zone 4 and Zone 5) includes key metabolic inflection points of anaerobic threshold/functional threshold power (FTP). At this intensity the body is shifting its mix of fuel-substrates (fats - carbohydrate) for energy.
During half-full marathons and half-full long-course triathlons, athletes spend most of their race-time between Zone 3 and Zone 4 intensities.
While optimizing fat-oxidation is key (see SFuels ZONE 2 product), training carbohydrate oxidation efficiency at Zone 4 race-intensities is important. Key enzymes involved in the final metabolism of carbohydrates, need to also be trained during high-intensity workouts, in the same way we train fat-oxidation efficiency during Zone 2 workouts. SFuels recommends supporting carbohydrate oxidation efficiency training during Zone 4 training and racing by using maltodextrin and Cyclic-Dextrin to support rapid gut transit, while avoiding (no Fructose) the risks of blunted training adaptions.
Additionally, SFuels ZONE 4 takes a 3-pronged approach to support Gut Resilience during High-Intensity training and racing. This includes -
- A reduced carbohydrate dependency and intake will lower the known risks of high-carbohydrate consumption during endurance training/racing,
- A gluten-free and sugar-alcohol-free formulation, SFuels Zone 4 drink mix minimizes the triggers known to add further risk of gut distress to training and racing. SFuels also excludes Fructose from its training products in avoiding Gut-membrane and aerobic adaptation de-training risks from day-to-day over-consumption of Fructose
- SFuels Extended Substrate uses select MCT fatty acids and Glutamine which both fuel and provide nutrition to support Gut membrane integrity, which supports building Gut resilience during training.
Finally, SFuels Extended-Substrate of 2Gr Glutamine fuzed with 2Gr C8-C10 MCT taken during high-intensity training workouts or multiple-doses during racing, will support lowered muscle soreness/DOMS, and more rapid recovery.
Maintaining proper electrolyte balance is crucial for athletes, especially during extended periods of training and in hot or humid conditions. To offset the electrolyte loss that occurs through sweat, higher doses of sodium and potassium supplementation are often warranted. Athletes who follow a lower carbohydrate protocol should supplement with electrolytes. It's important to consult with a healthcare provider or sports nutritionist to determine the appropriate electrolyte supplementation based on individual needs and training conditions.
SFuels ZONE 4 delivers 2X carbohydrate load, and 4X Glutamine per serve, compared to 1st generation SFuels RACE+ thanks to the dosage efficiency of SFuels Extended Substrate(TM).