- Threshold Performance Club
- Posts
- Threshold Performance Club | The Fitness Newsletter
Threshold Performance Club | The Fitness Newsletter
Threshold #39 | This Supplement Is [almost] A Superpower


Magnesium has been my secret weapon for better sleep in the past 4 months.
But not all forms of Mg are equal.
Specifically L-Threonate.
Also if you’re searching for a 10K training plan; one that has proven results cracking the 40 minute time barrier; I’ve just launched mine.
It’s here.
So why is magnesium so hyped right now?
The Main Feature
Leg 1: The Marvelous Benefits of Magnesium
Magnesium is a powerhouse mineral that contributes to an array of physiological processes within the body. From muscle function and bone health to energy production and nerve transmission, its benefits are wide-ranging. Athletes and fitness enthusiasts, in particular, stand to gain much from sufficient magnesium intake. Improved muscle performance, reduced muscle cramps, and enhanced exercise recovery are among the top advantages.
Moreover, magnesium supports cardiovascular health by regulating blood pressure and maintaining a steady heartbeat. This can translate to better endurance during workouts and reduced risk of certain cardiovascular conditions. Additionally, magnesium plays a vital role in maintaining healthy bone density, which is crucial for athletes prone to stress fractures.
There are different types of magnesium supplements available on the market, each offering specific benefits:
Magnesium Citrate: This form of magnesium is easily absorbed by the body and is commonly used to promote digestion and relieve constipation. It is popular among those looking for a gentle and fast-acting solution for constipation issues.
Magnesium Glycinate: Known for its excellent bioavailability and minimal laxative effect, magnesium glycinate is a popular choice for those seeking relaxation and support for muscle recovery. Its calming properties make it a preferred option for improving sleep quality.
Magnesium Malate: Ideal for individuals experiencing fatigue or muscle pain, magnesium malate plays a role in the energy production process. It is often used by athletes to combat muscle soreness and boost exercise performance.
T-1: Mental Preparation
One of the benefits of supplementation is the mental effect of knowing you’re improving your health. Whether true or not, placebo can be powerful.
Part 2: Magnesium and Sleep - Unraveling the Connection
Sleep, the cornerstone of recovery, is where magnesium shows another impressive aspect of its prowess. This mineral is believed to play a role in the regulation of neurotransmitters that influence sleep patterns. Adequate magnesium levels may help alleviate insomnia and promote deeper, more restful sleep. For fitness enthusiasts seeking peak performance, quality sleep is non-negotiable, and magnesium could be the natural solution to achieve it.
One specific form of magnesium that has gained attention for its potential sleep benefits is magnesium L-threonate. This form of magnesium is unique due to its ability to cross the blood-brain barrier more effectively compared to other magnesium types. This property allows magnesium L-threonate to exert its positive effects directly on the brain, potentially enhancing cognitive function and sleep quality.
Research suggests that magnesium L-threonate may support better sleep by increasing the levels of magnesium in the brain and positively influencing certain receptors involved in sleep regulation. Some studies have shown that this form of magnesium could improve sleep efficiency, reduce sleep disturbances, and enhance overall sleep duration, making it an intriguing option for individuals looking to optimize their rest.
Additionally, magnesium L-threonate's cognitive benefits could indirectly contribute to better sleep. As it supports brain health and function, it may help reduce stress and anxiety, leading to improved relaxation and sleep quality.
While magnesium L-threonate holds promise, it's essential to note that research on its specific sleep benefits is still relatively limited compared to other forms of magnesium. As with any supplement, individual responses can vary, and more research is needed to fully understand its potential sleep-enhancing properties.
When considering magnesium L-threonate as a sleep aid, it's crucial to consult with a healthcare professional to determine the appropriate dosage and assess any potential interactions with medications or existing health conditions. As with any dietary supplement, moderation and informed decision-making are key.
In addition to magnesium L-threonate, other forms of magnesium, such as magnesium glycinate and magnesium citrate, can also contribute to better sleep and relaxation. The choice of magnesium supplement may depend on individual preferences, dietary restrictions, and health considerations.
Remember that while supplements can be beneficial, they should not replace a healthy lifestyle and balanced diet. Prioritizing regular exercise, managing stress, and adopting good sleep hygiene practices are equally essential for achieving optimal sleep and overall well-being.
T-2: Gear to change into
Shop natural supplements formulated to enhance performance:
🌱💊 542 Performance Nutrition Daily Green’s ultimate super greens capsules are a perfect blend of superfoods, vitamins, minerals and wholefood-sourced ingredients enhancing your immune system to help you perform in training.
🍄 542 Performance Nutrition Mushroom+ capsules are single-ingredient, high-strength mushroom supplements, helping you deliver energy to your body for training.
💪 542 Performance Nutrition Marine Collagen is the highest quality, and most bioavailable source of collagen available, helping to provide structural integrity to joints and bones.
💤 542 Performance Nutrition Ashwagandha+ (KSM66) is formulated with Cordyceps & Ginseng to help combat stress and adrenal fatigue, while also supporting the immune system, energy levels & mental performance.
🏋️♂️ 542 Performance Nutrition Plant Protein delivers 17g of premium vegan protein per serving with just 1.5g of carbs, 88 calories & no artificial sweeteners.
🏋️♂️ 542 Performance Nutrition Whey Protein delivers 22g of premium whey protein per serving with just 1.2g of carbs, 108 calories & no artificial sweeteners.
Part 3: The Caveats - Potential Negatives of Magnesium
While magnesium offers a plethora of health benefits, it's essential to recognize that excessive intake, especially through supplements, may lead to adverse effects. Gastrointestinal issues, such as diarrhea and stomach cramps, are common side effects of overconsumption. Therefore, it's crucial to obtain magnesium primarily through a balanced diet, incorporating magnesium-rich foods like leafy greens, nuts, seeds, and whole grains.
Moreover, individuals with certain health conditions, such as kidney problems, should exercise caution with magnesium supplementation, as it can exacerbate these issues. Always consult with a healthcare professional before starting any new supplementation regimen.
In conclusion, magnesium is a fascinating mineral that offers a plethora of potential benefits for health, fitness, and sleep. Magnesium L-threonate, with its unique ability to cross the blood-brain barrier, holds promise for enhancing sleep quality and cognitive function. However, it's essential to approach supplementation with caution, consulting with a healthcare professional to determine the best approach for individual needs.
As always, the pursuit of a well-rounded, healthy lifestyle remains the foundation of achieving fitness and wellness goals. Stay informed, stay active, and prioritize self-care to unlock the full potential of magnesium and other natural solutions for better health and restful sleep.
Aid station: Learn as you recover
Huberman Lab: Toolkit for sleep. Read & listen here.
Workout of the Week: VO2 Max Cycling Session
Introduction to the Workout:
Welcome to this week's intense and challenging VO2 max cycling session! VO2 max workouts are designed to push your cardiovascular capacity to its limits, helping you become a more efficient and powerful cyclist. This workout will test your endurance, strength, and mental fortitude. Remember to listen to your body throughout the session and adjust the intensity as needed. Let's get ready to push ourselves to new heights!
Warm-Up:
Start with 5 minutes of easy-paced cycling to warm up your muscles and gradually increase your heart rate.
Perform 3 sets of 30-second accelerations, gradually increasing your effort from moderate to hard. Take 1 minute of easy cycling between each acceleration to recover.
Main Set:
5x3-minute intervals at 90-95% of your maximum effort. Aim to maintain a consistent and challenging pace throughout each interval. Take 2 minutes of active recovery (easy cycling) between each interval.
4x1-minute all-out sprints. Go as hard as you can during each sprint, giving it your maximum effort. Take 2 minutes of easy cycling between each sprint to recover.
Cool Down:
After completing the main set, cool down with 5 minutes of easy-paced cycling to gradually lower your heart rate.
Finish the workout with 5-10 minutes of gentle stretching for your legs, back, and hips to prevent muscle tightness and enhance flexibility.
Tips for Success:
Stay Focused: VO2 max workouts are mentally and physically demanding. Stay focused on your form and breathing, and remind yourself of your goals throughout the session.
Proper Breathing: Practice deep and controlled breathing during intense efforts to maximize oxygen intake and optimize performance.
Hydration: Stay hydrated before, during, and after the workout. Consider having a water bottle and electrolyte-rich drink within reach during the session.
Pacing: During the intervals, aim to pace yourself and maintain a consistent effort. Avoid going all-out too early and leaving nothing for the later intervals.
Recovery: Give yourself ample time to recover between intervals and sprints. Use the active recovery periods to catch your breath and prepare for the next effort.
Listen to Your Body: If you feel overly fatigued or experience discomfort beyond normal exertion, consider scaling back the intensity or ending the workout early.
Remember that VO2 max training is demanding, so it's essential to schedule adequate rest and recovery days into your training plan. Gradually build up the intensity and duration of these workouts over time to avoid injury and maximize the benefits.
Push yourself, embrace the challenge, and enjoy the sense of accomplishment as you complete this VO2 max cycling session. Your hard work and dedication will lead to improved performance and increased fitness levels.
Thank you for reading this weeks newsletter.
Remember: if you’re searching for a 10K training plan; one that has proven results cracking the 40 minute time barrier; I’ve just launched mine.
It’s here.
Have a great week of training.
Robert