PTC: Module 8 - Lifestyle Factors

In the adrenal gland.

It improves athletic performance and recovery.

The hypothalamus in the brain.

Psychological stress may not suppress neuromuscular recovery unless it is associated with a biological stress response and suppression of the parasympathetic nervous system.

'Eustress' is a form of stress that can be healthy for the body, helping it stay strong and active.

Three stages (N1 - N3).

Psychological stress can interfere with dietary adherence, training motivation, and sleep quality, which can in turn interfere with muscular recovery.

Increased stress and reduced sleep quality can lead to hormonal imbalances, increased fat storage, muscle loss, and impaired recovery.

You age faster, accumulate oxidative stress, and die sooner.

We go through 5 cycles of the 3 non-REM sleep stages, each ending in a REM phase.

Most people don't have access to polysomnography outside of a laboratory.

High psychological stress can double the time needed to recover from workouts.

Because psychological stress is very real in the mind of the person experiencing it and can affect their fitness lifestyle.

Because everyone should try to optimize their sleep quality with low-effort strategies regardless of what a sleep tracker says.

By monitoring changes in weight, body fat percentage, muscle mass, and overall physical performance, while also considering subjective measures like mood and energy levels.

19.7 calories.

4 - 6 REM phases.

Subjective sleep quality is a simple and practical option.

Waking up without an alarm every day around the same time feeling fully refreshed.

Strategies include maintaining a consistent sleep schedule, creating a restful environment, limiting screen time before bed, and managing stress.

Psychological life stressors are often chronic, while the stress-response evolved to be episodic, not chronic.

80 calories.

It generally decreases.

Tasks and skills are better learned and memorized if you sleep in between sessions.

Subjective sleep quality overall correlates quite well with objective sleep quality in healthy people.

Stress considerably impairs the healing time of various pathologies, including simple wounds.

Prioritize getting more sleeping time and implement additional sleep optimization strategies.

Wakefulness describes the daily recurring state in which an organism engages in coherent cognitive and behavioral responses to the external world.

Burnout and Cushing’s syndrome.

Techniques include practicing mindfulness, engaging in regular physical activity, maintaining a healthy diet, and seeking social support.

An ancient survival mechanism characterized by the release of cortisol, adrenalin, and other hormones from the adrenal gland, putting the body in fight-or-flight mode.

Making lifestyle changes rather than spending days making trivial decisions.

Yes, the brain is quite active during sleep and its activity changes systematically across different stages of sleep.

Sleep is an important part of memory reprocessing, with brain activity patterns corresponding to practiced movements being repeated at night.

The testosterone-to-cortisol ratio (TC ratio).

Healthy sleep entails falling asleep within 30 minutes.

Sleep is defined as a reversible behavioral state of perceptual disengagement from and unresponsiveness to the environment.

Chronically high cortisol levels.

By setting realistic goals, incorporating enjoyable activities, gradually increasing intensity, and providing ongoing support and motivation.

Electroencephalogram (EEG).

Being in fight-or-flight mode all the time doesn't leave enough room for rest-and-digest mode, slowing down immune and digestive systems and suppressing reproduction, growth, and repair.

At night, the motor cortex practices the squat movements again.

Stress elevates cortisol, which antagonizes testosterone, predictably lowering the TC ratio.

Chronic stress can reduce energy expenditure.

Electrooculogram (EOG).

Synaptic homeostasis is the process by which sleep allows the brain to reestablish synaptic and cellular balance.

A good training program should take into account the stress experienced by the individual, potentially lowering training frequency or volume.

Electromyogram (EMG).

Increased heart and breathing rates, mobilization of glucose, fatty acids, and amino acids, blood vessel constriction, and blood directed away from the skin.

If it rains, I go to work by car. Otherwise, I go by bicycle.

Synapses are the connections between our nerve cells.

Electrocardiogram (ECG).

A phenomenon where sensitivity to pain from physical stressors decreases.

Clear, concrete if-then rules for your life, also known as action triggers.

Because sleep deprivation does not have much negative effect on acute strength levels.

There is a net increase in synaptic strength during wakefulness due to plastic changes needed to process information.

Waves in multiple rows, with each distinct wave corresponding to markers like EEG, EOG, EMG, and ECG.

The time spent seated is an independent predictor of dozens of health complications.

Physical performance starts to deteriorate.

Each sleep stage emits a different frequency and intensity of EEG waves.

During sleep, synaptic strength is downscaled to maintain homeostasis.

Make a habit of drinking lots of fluids to prevent prolonged sedentary posture and slightly raise metabolism.

Sleep requirements seem to increase as body fat percentage decreases, possibly due to a lower tolerance for stress.

7+ hours per night.

A consistent meal frequency helps maintain a stable biorhythm, which is beneficial for health, body composition, and mental wellbeing.

5 sleep cycles, each approximately 90 minutes long.

Strength training improves sleep quality.

It may be associated with depression and boredom.

Sleep starts at a 'shallow depth' (N1) and gets deeper over time.

Because it makes you more vulnerable to stress and has negative effects on almost every system in your body.

9 hours per night, after correcting sleep debt.

Most bodily functions are reduced, heart and breathing rates are reduced, and pupils narrow, signaling a more parasympathetic tone.

A stable biorhythm with fixed meal times, caffeine use, light exposure, and exercise can improve cognitive functioning, physical performance, and overall wellbeing.

7.5-8 hours per night.

A little stress is good for diet adherence because it suppresses appetite.

Muscular tone is reduced to zero, heart rate, breathing rate, blood pressure, and cerebral blood flow all rise, and dreams occur.

Sleep regularity is a stronger predictor of all-cause mortality than total sleep duration.

Some research finds that afternoon workouts may improve sleep duration compared to morning workouts, but most research finds the timing of exercise trivial for sleep quality.

It causes hugely unfavorable alterations, reducing rates of myofibrillar protein synthesis.

Sleep requirements increase as a result of intense training.

The sympathetic nervous system and the hormones adrenaline and noradrenaline.

Polysomnography is a method of quantifying sleep stages using sensors to measure small electrical currents emitted by mammals and birds.

Cortisol, the stress hormone.

It measures small electrical currents emitted by the body and analyzes four markers corresponding to different levels of activity for each sleep stage.

Routine is considered efficient because it allows you to forget your diet and not think about what to eat, when to eat, or when to train.

If you wake up naturally at the same time every day and feel completely refreshed.

Keep a calorie-free beverage on your desk and make sure it's empty at certain times of day, like before meals or before going to the gym.

Because during REM sleep, the eyes move in a rapid manner underneath the eyelids corresponding to the content of the dream.

You may suffer permanent brain damage and increased lifetime risk of neural diseases and memory impairments.

They increase activity level without disrupting work quality or productivity, and they don't increase appetite.

Naps are highly effective for counteracting physical and mental fatigue acutely.

174 kcal extra.

Women generally rely more on comfort food to counteract unhappiness and stress than men.

Unless you nap for a full sleep cycle of ~90 minutes, you won’t enter deep sleep.

11.5% increase.

The pleasurable sensation of eating is brief, and food does not provide a significant biochemical reward compared to important life events.

Late morning or early afternoon.

100-150 kcal per hour.

No, unhealthy foods are not more effective than healthy foods in reducing stress.

Because we are intuitively inclined to lower our spontaneous physical activity level after periods of higher activity.

Having a sleep efficiency of at least 85%.

To measure sleep quality in great detail.

They overestimate it by about half an hour a day.

No, it suggests you spent a relatively large amount of time in REM sleep instead of deep sleep.

Common levels of sleep deprivation can significantly impair gains, leading to increased fat gain, especially in the abdominal area, and promoting an unhealthier body fat distribution.

Fixing your sleep can help you gain pounds of muscle and lose pounds of fat without exercise or dieting.

It can increase your ad libitum energy intake by 20%.

It can reduce your ad libitum energy intake by several hundred Calories.

Sleep deprivation can cause a 2-8% decrease in basal metabolic rate, often with no change in total energy expenditure despite a generally higher activity level.

There is a nearly linear dose-response relationship where each hour of additional sleep debt decreases brain functioning almost as much as the hour before.

It can decrease testosterone production by ~13%.

A night without sleep can impair testosterone production by 24%.

Sleep is closely linked to the functioning of our immune system and is an important modulator of endocrine function, including hormone production.

Stage N3 is associated with increases in growth hormone production and is important for physical restoration.

Because their physical recovery requirements are higher.

Older populations show decreasing time spent in a slow-wave state, in line with their reduced physical recovery requirements.

Newborns sleep substantially more hours than adults, and about 50% of their sleep shortly after birth is spent in REM sleep phases, which may play a role in neural development.

Growth hormone production may decrease with extreme sleep deprivation.

The body compensates with increased daytime production.

Cortisol production generally stays roughly the same but can become more variable.

Increased insulin resistance, both acutely and chronically.

Sleep deprivation increases systemic inflammation levels.

Decreased cognitive functioning, including impaired self-control.

Sleep deprivation decreases wellbeing.

Sleep deprivation impairs exercise performance mainly due to underrecovery and reduced willpower and motivation.

Training distress and perceived effort increase far more.

With willpower and motivation, though recovery afterwards may be an issue.