Definition and system context

Short version Noradrenaline and adrenaline are produced mainly in the adrenal medulla and parts of the nervous system. They act as both hormones and neurotransmitters and are central messengers of the stress and activation response: they increase heart rate and blood pressure, open the airways, raise glucose and free fatty acid availability and shift blood flow towards skeletal muscle.

For hardgainers, catecholamines can act in two main ways:

• Acute performance boost: Before exams, competitions or heavy sets, noradrenaline and adrenaline increase focus, reaction speed and “drive” for training.
• Chronic stress mode: Ongoing stress, too much caffeine, poor sleep and unstructured workload can push the system into a state of internal restlessness, poor recovery and the classic “always tired but wired” feeling.
• System, not a single switch: Catecholamines interact with cortisol, melatonin, thyroid hormones and your TDEE and NEAT. The decisive factor is the overall state of the system, not a single hormone value.

Measurement and practical markers

Catecholamines can be measured in blood or urine, but this is rarely done routinely in day-to-day practice. For training, daily life and hardgainer application, you mainly work with functional markers instead of lab values:

• Heart rate and resting HR: Chronically elevated resting heart rate, very strong HR responses to small efforts and a slow drop in heart rate after training can indicate a generally high stress and activation level.
• Sleep quality: Trouble falling asleep, frequent nighttime awakenings and the feeling of going to bed “wired but exhausted” point to an imbalance between catecholamines, melatonin and recovery.
• Subjective biofeedback: Irritability, constant internal restlessness, “always tired but never really relaxed”, sudden performance drops in the gym and unexplained plateaus are typical patterns when stress is chronically high.

Steering in training (guardrails)

• Not every session needs max hype: Training works without turning every day into meet day: you do not need constant hype playlists, triple-stacked pre-workouts and every set to failure. Acute phases are fine – chronic overactivation eats into recovery.
• Structure lowers stress: A clear plan with defined training volume, target RIR (reps in reserve) and progression logic reduces mental load and unnecessary activation spikes.
• Sleep as the counterweight: As long as you do not take sleep and melatonin rhythm seriously, you are running uphill hormonally. For hardgainers this often means: appetite swings, poor recovery and training feeling harder than it needs to be.
• Caffeine and stimulants: Caffeine can improve performance, but high doses and late intake amplify stress responses and disrupt sleep. Simple rule: cap the dose, taper in the afternoon, and build in stimulant breaks.

Practice – 14-day orientation

• Day 0: Define your setup: a training plan with clear periodisation, target RIR and MEV / MAV. Lock in a sleep window, cap caffeine times, and be honest about work and life stress.
• Daily: Resting heart rate, subjective fatigue, sleep duration and quality, training performance and mood. Take brief notes and look at weekly averages. Goal: spot patterns (“Mondays always crushed after weekend night shifts”, “too much caffeine before late shifts”, etc.).
• Day 14: If you feel chronically “wired but tired”, see performance drop in the gym and sleep is poor, the system is more likely overloaded than “too weak”. Adjust volume, schedule a deload week and prioritise key stimuli instead of trying to maximise everything at once.

Common misunderstandings

• “The more adrenaline, the better the training.” Performance benefits from activation – up to a point. Too much stress, too many stimulants and constantly high pressure hurt technique, recovery and long-term progress.
• “Stress does not matter, only calories and the plan.” For hardgainers, calories and planning matter – but cortisol, catecholamines and sleep hygiene determine whether you can actually deliver the planned work with quality.
• “I am just too weak, not overloaded.” If you constantly feel exhausted yet wired, sleep is poor and gym performance is trending down, that is more likely a stress and recovery problem than a character flaw.

Further reading and resources

Note: Content is for context and education; individual adjustments may be useful or necessary.