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Threshold Performance Club | The fitness newsletter
Threshold #50 | The secrets of winter training ❄️

First things first, a huge thank you to everyone who shared last week’s e-mail. Thanks to you we hit 1,153 members passing the 1,000 subscriber mark 🥳. Welcome to the additional new members, the next goal is 5,000(!).

You guys are the best, let’s keep the momentum going!
We’ve upgraded our referral programme. You can learn more about it at the bottom of the newsletter. Earn rewards as you refer new readers. At 5 referrals you’ll receive our Ultimate Running Bible (which includes the 10K & half marathon training plans) & at 25 you’ll unlock the Black Card.
But anyway on to this week’s NL… Winter is here, how should we train?
The Main Feature
Leg one: Physiological Adaptations to Cold
The cold weather brings about several physiological changes that an athlete must adapt to. The immediate bodily response to cold is vasoconstriction, where blood vessels narrow to retain core heat. This, however, can reduce blood flow to muscles, potentially impacting performance. It's essential to have a thorough warm-up to increase blood circulation, mitigating the effects of vasoconstriction. Additionally, investing in compression garments or heated clothing can promote better blood circulation.
Your metabolic rate may also increase as the body works harder to maintain core temperature, leading to higher caloric requirements. Monitoring calorie burn and intake meticulously, and consulting with a sports nutritionist can ensure adequate fueling. Interestingly, the cold activates brown adipose tissue to generate heat through a process known as thermogenesis, which could further impact your energy expenditure. Exploring how increased brown fat activity affects your caloric needs and adjusting your nutrition accordingly could be beneficial.
The respiratory system can also be affected by cold, dry air which may irritate the respiratory tract. A proper warm-up can help acclimate the respiratory system, and wearing a mask or scarf can warm the air you breathe, reducing respiratory discomfort. Lastly, cold-induced diuresis is a response to cold temperatures which could potentially lead to dehydration. It's crucial to monitor hydration levels, adjusting fluid intake to maintain optimal hydration. The cold can also trigger hormonal responses, including the release of cortisol, a stress hormone. Chronic exposure to cold weather could lead to elevated cortisol levels, affecting your recovery and immune system, necessitating a strategy to manage stress and monitor your hormonal levels.
T-1: Mental Preparation
Cold weather heavily impacts body temperature. Ensure you’ll prepared with the correct gear. You’ll then be confident to have a successful training session.
Optimise your Mindset
🙏 Dial in your mindset with our Ultimate Health 101 guide including tips on neurolinguistic programming & mental models for focus during your training.
🧠 A healthy mind starts with good nutrition, sleep & a healthy lifestyle. Discover more in the Ultimate Health 101 guide here.
Leg 2: Training Modification and Injury Prevention
Adapting your training regimen to winter conditions is crucial for performance maintenance and injury prevention. Longer warm-up sessions are essential to prepare muscles, tendons, and joints for the workout ahead. A thorough cool-down is equally important to kickstart the recovery process and prevent injuries.
Strength training should be incorporated to build muscle resilience, focusing on core and the muscle groups most used in your endurance events, which also aids in correcting muscle imbalances to prevent overuse injuries. Regular stretching and mobility exercises should be included to maintain a good range of motion, crucial for injury prevention. Engaging in yoga or Pilates can be beneficial for enhancing flexibility and mobility.
Equally important is the gear and environment. Dressing in layers to manage body temperature and ensuring good traction with your footwear to prevent slips and falls on icy or wet surfaces is key. If the weather is too severe, indoor training is a safe alternative, though it's beneficial to mimic outdoor conditions as much as possible to keep training specific. Advanced athletes often use periodization strategies to structure their training. During winter, focusing on building strength and correcting muscular imbalances could set a solid foundation for more specific endurance work as the weather improves. Engage in biomechanical analysis to identify and correct any movement inefficiencies or imbalances, which could prevent overuse injuries. Altitude training, if accessible, can be a powerful tool to improve aerobic capacity and endurance performance, and could also be an indoor alternative when outdoor conditions are unfavorable.
T-2: Gear to change into
Shop natural supplements formulated to enhance performance:
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💪 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.
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Leg 3: Mental Resilience, Monitoring, and Recovery
Building mental resilience is part of the preparation for the rigorous events you aim to participate in. Training in a variety of weather conditions, embracing the challenges winter presents, and having a strong network of training buddies can cultivate mental toughness. Integrating Psychological Skills Training (PST), like visualization, goal-setting, and mindfulness, can enhance mental resilience and performance, especially when facing the added challenges of winter training.
Keeping a detailed training log and possibly working with a coach can provide valuable feedback to adjust your training plan based on progress and adaptation to winter training. Utilizing sports technology like heart rate monitors or power meters, as well as engaging in advanced monitoring technologies like VO2 max testing, lactate threshold testing, and sleep tracking can provide insightful data on your physiological responses to training, recovery status, and overall well-being.
Recovery is a cornerstone of successful training, with sleep and nutrition being paramount. Ensuring a balanced intake of protein, carbohydrates, and fats to support the training load, and exploring recovery modalities like massage, foam rolling, cold water immersion, cryotherapy, infrared saunas, or pneumatic compression devices can significantly enhance recovery processes. Consulting with a sports nutritionist to tailor your diet to training demands and engaging in proactive recovery strategies will be instrumental in preparing you robustly for your ambitious 2024 goals.
Aid station: Learn as you recover
Watch my latest videos on Tik Tok here.
Discover the latest scientific health research with Huberman Lab.
Learn from Nick Bare what it takes to be an endurance athlete here.
Level up your discipline listening to retired Navy SEAL Jocko Willink sharing advice.
Level Up Your Training with the Ultimate Running Guide 🚀
Everything I’ve learned into one training guide.
🧠 Optimise your sleep, nutrition, glucose and general health with Ultimate Health 101 here. Covering everything from the optimal sleep stages to which supplements to take.
🙏 Dial in your mindset with our guides on neurolinguistic programming & mental models for focus during your training.
🏃 🏃♀️ Training plans for your next 10k, half marathon or Ironman 70.3. The 10k and HM plans are included in the Complete Running Bible
BONUS: Get everything.. Ultimate Health 101, 10K, Half Marathon & Ironman 70.3 training plans included in one guide, the Ultimate Running Guide here.
Secure this offer for just £39 (worth £79).
Coaches Corner
The best way to train throughout the winter is in a way you feel most comfortable. If that’s indoors then great. Find a treadmill, a spinning session or an indoor pool.
WOTW: Workout of the Week
Intro to the Workout: This indoor treadmill session aims to blend aerobic endurance with speed work, providing a balanced stimulus to maintain your conditioning and pacing skills as you embark on your winter training journey.
Warm Up:
Begin with a 10-minute jog at 60% of your maximum heart rate (MHR) or a pace that feels easy, to increase blood circulation and warm up the muscles.
Proceed with 5 minutes of dynamic stretching including high knees, butt kicks, and walking lunges to prepare your muscles and joints for the main set.
Main Set:
Run for 20 minutes at your marathon goal pace, which should be around 70-75% of your MHR. This segment aims to build a solid aerobic foundation. Use the treadmill settings to ensure a consistent pace.
Transition into 5 x 1-minute intervals at a pace corresponding to 85-90% of your MHR, which would typically be around your 10k or 5k race pace. Ensure to have 1-minute of active recovery (jogging at 60% of MHR) in between each interval. This segment aims to introduce some speed work and improve leg turnover.
Cool Down:
Engage in a 10-minute jog at 60% of your MHR to help bring your heart rate down gradually and initiate the recovery process.
Follow with 5-10 minutes of static stretching focusing on major muscle groups including quads, hamstrings, calves, and glutes to aid in recovery and improve flexibility. Hold each stretch for about 30 seconds to allow for adequate muscle relaxation and elongation.
This workout is structured to provide a balanced approach between endurance and speed, essential for maintaining a competitive edge in your event-specific training as you progress through your winter training phase. Remember to hydrate well, and consider using a heart rate monitor to ensure accurate zone training throughout the session.
The new referral programme
The best way to support the newsletter is to refer it to your friends and family & you’ll be rewarded for it! Work your way up to the Black Card. You’ll receive something of greater value every time you reach a milestone.

The Referral Programme
Thank you for reading this weeks newsletter.
The best way to support the newsletter is to refer friends & family. Every share is hugely appreciated, thank you in advance!
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Have a great week,
Robert