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Energy: the #1 complaint

Hidden vs visible stressors. Exercise gives energy; under-fuelling and stimulant loops take it.

Energy is the number one reason people come to Galpin: tired all day, can't sustain output, recovery takes longer. What separates world-class performers isn't working harder — it's energy management: choosing what matters, stripping the rest.

He splits causes into visible stressors (you're not exercising, you're under-fuelled, you're over-caffeinated and under-slept in a loop) and hidden ones (a pathogen, mould, low energy availability, a mismanaged relationship). Exercise reliably increases feelings of energy across 70 trials — 'stress inoculation': the thing that exhausts you now is the thing that gives you capacity later. Light-to-moderate sessions give energy the same day; hard sessions cost today and pay on aggregate.

Track a daily energy (and stress) rating; SleepShred correlates it with sleep, caffeine, exercise and alcohol so you can find your own constraint.

Sources · 4

Effects of chronic exercise on feelings of energy and fatiguePuetz TW, O'Connor PJ, Dishman RK · 2006Across 70 trials, regular exercise reliably increased feelings of energy and reduced fatigue — Galpin's 'stress inoculation'.Association between objectively-measured physical activity and sleep, NHANES 2005–2006Loprinzi PD, Cardinal BJ · 2011150 min/week of moderate-vigorous activity was associated with ~65% better odds of feeling well rested.The bidirectional relationship between exercise and sleepKline CE · 2014Better sleep → more exercise → better sleep: a loop worth starting anywhere.The cumulative cost of additional wakefulnessVan Dongen HP, Maislin G, Mullington JM, Dinges DF · 2003Two weeks at 6 h/night produced deficits equal to two nights of total deprivation — while subjects felt only mildly sleepy. You adapt to feeling tired, not to being impaired.

Related topics

Sleep duration & healthExercise, RHR & energy

Frequently asked questions

Energy: the #1 complaint?

Hidden vs visible stressors. Exercise gives energy; under-fuelling and stimulant loops take it.

Is SleepShred free?

No. SleepShred Pro is $4.99 per month or $29.99 per year, with no free trial and no ads. Everything stays on your iPhone.

Track it, don't guess it

SleepShred turns this research into a 20-second daily habit: log your night, see which of your own behaviours move your sleep, and screen for the disorders nobody diagnoses.

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.