Sources for the running advice
Health organizations, research, and further reading behind Run With Tim’s advice on running, nutrition, sleep, and safety.
Health Promotion and Chronic Disease Prevention in Canada · Exercise timing review
A review of 35 studies found no consistent health advantage for one exercise time. Morning and afternoon activity can both support health; the quiet morning routine here is Tim’s preference.
CDC · Sun safety
Combine shade, protective clothing, a wide-brimmed hat, UVA/UVB-blocking sunglasses and broad-spectrum sunscreen. Reapply sunscreen at least every two hours and after sweating, following its label.
Mayo Clinic · High-fiber foods
Fiber amounts are approximate and vary by serving and preparation. These are ten practical choices, not an exhaustive ranking. Increase fiber gradually and drink fluids.
Nike · Caring for workout clothes
Nike recommends hanging washed workout clothes on a drying rack to help extend their life. Follow each garment’s care label.
Romijn et al. · Exercise intensity and fuel use
This study in trained participants found that glucose and muscle glycogen use rose with exercise intensity. Fuel use during a workout is different from long-term body-fat loss. It does not establish that Zone 2 is the only way to improve, or that harder running requires eating added sugar.
Cleveland Clinic · Zone 2 cardio
Describes Zone 2 on a five-zone scale as a comfortable aerobic effort that supports endurance. Being able to hold a light conversation is a practical guide. Zone labels and heart-rate boundaries vary across training systems; the talk test is an estimate, not a precise measurement.
Seiler · Training intensity in endurance athletes
This review describes competitive endurance athletes doing about 80% of sessions at low intensity. It supports keeping a large share of training easy, but does not establish a universal 90% Zone 2 rule for beginners or for each individual run.
Harvard · Do I need electrolyte drinks?
Water is generally enough for lower-intensity exercise under an hour in moderate temperatures. Balanced meals provide electrolytes. Longer activity, heat, and heavy sweating can change needs. Table salt supplies sodium and chloride; adding salt to every drink is not routinely necessary.
Clean & Delicious · Green smoothie video
A recipe demonstration using spinach, avocado, hemp seeds, blueberries, and protein powder. The book offers a variation with chia seeds and Greek yogurt. This video is a cooking reference.
Johns Hopkins · Exercise and sleep
Exercise can improve sleep, sometimes as soon as the same night. Responses vary. Exercise raises body temperature and alertness; some people need time to wind down, while others sleep well after evening exercise.
Nature Communications · Evening exercise timing
A 2025 observational study of 14,689 active adults linked later, harder exercise with poorer sleep. Exercise ending at least 4 hours before sleep was not associated with disruption. This is a practical buffer, not a rule that every evening run harms sleep.
BHF · Fiber and satisfying meals
Fiber can make meals more satisfying. Include vegetables, fruit, whole grains, beans, or seeds alongside protein. More fiber alone does not guarantee weight loss or faster running.
BHF · Smoothies and fiber
BHF recommends small portions of smoothies with meals, without added sugar. Whole fruit and vegetables remain useful parts of a varied diet. This source does not establish that blending makes large amounts of fiber easier to digest.
BDA · Food for exercise and recovery
Carbohydrate fuels exercise and protein supports muscle repair. Match food intake to training; eating too little can cause fatigue and delay recovery. Cutting carbs does not guarantee better running.
NIDDK · Eating, activity, and weight
Weight management depends on overall food intake and activity. Choose a varied eating pattern you can maintain. No single food guarantees weight loss; calorie counting is not a requirement for everyone.
HOKA · Clifton 10
Product details from HOKA. The fit and lifespan in tip 1 describe Tim’s own experience.
NHS · Starting with run–walk
Start with walking breaks and rest between runs. Give yourself time, and stay aware of your surroundings.
CDC · Movement, mood and sleep
Physical activity can reduce short-term anxiety and support better sleep. These benefits do not promise a particular feeling after every run.
CDC · Use the talk test
The talk test helps you judge effort without a watch. At moderate effort you can talk; needing a breath after only a few words indicates vigorous effort.
CDC · Small amounts count
Some physical activity is better than none. You can divide it into smaller periods and choose activities you enjoy that suit your abilities.
Johns Hopkins · The runner’s high
Running can support mood and mental health. A runner’s high is not guaranteed, and researchers link it to several processes, including the body’s endocannabinoid system.
Smokefree · Move through a craving
Even brief physical activity can help with cigarette cravings. A short walk is one useful part of a quit plan.
Smokefree · Help with quitting
Nicotine replacement can reduce withdrawal and cravings. Combining it with quit counseling can improve the chance of stopping smoking.
NHS · Stopping alcohol safely
If you are physically dependent on alcohol, stopping suddenly can be dangerous. Get medical advice before stopping. Seizures or hallucinations need emergency help.
NHS · Benefits of drinking less
Drinking less can improve sleep, mood, and energy. People who have withdrawal symptoms should get medical advice before stopping.
NIAAA · Alcohol and the brain
Alcohol affects brain functions including judgment and memory. Recovery after long-term heavy drinking has no single timeline for everyone.
NIDDK · Add fiber gradually
Introduce fiber gradually and drink enough fluids. Vegetables, fruit, beans and whole grains are useful sources; no special smoothie is required.
NHTSA · Crossing safely
Make eye contact where possible, wait for vehicles to stop, and check for traffic before crossing.
National Park Service · Passing others
When approaching from behind, calmly announce yourself and let the other person know you want to pass.
NHTSA · Be seen outside
Bright colors help in daylight. After dark, add reflective material and a light; colorful clothing alone is not enough. See pages 14–15 of the booklet.
CDC · Heat and athletes
Exercise during cooler hours, drink water, and stop activity if you feel faint or weak. Hot-weather exercise increases dehydration and heat-illness risk.
NHS · Dehydration and DVT
The NHS lists dehydration as a DVT risk factor. This does not mean a hot run will cause a clot. One-sided leg pain or swelling needs urgent medical assessment; chest pain or breathlessness with these symptoms requires emergency help.
AirNow · Smoke and air quality
Check local air quality and health advice when it is smoky. Change your outdoor plans when needed and keep indoor air clean.
NHS · Listen to pain
Do not keep running through pain. Recover before returning; get help for severe, swollen or persistent symptoms. Start gently and avoid sudden increases.
MedlinePlus · When to get urgent help
Breathing difficulty, fainting, a sudden change in awareness and lasting chest discomfort can signal a medical emergency. Get help promptly.