Every claim, with its receipt.

Adults generally require seven or more hours of sleep for health; regularly shorter sleep is associated with adverse outcomes.

Population-level consensus, not an individual prescription.

Sleep restriction reliably degrades sustained attention and reaction time, with dose-dependent effects.

Lab measures of vigilance. We infer, and do not claim to have measured, the effect on sales conversations.

Slow-paced breathing and HRV biofeedback produce short-term shifts in autonomic balance and reduce self-reported stress.

Effect sizes are modest and heterogeneous. Useful, not curative.

Meditation practice is associated with altered default mode network activity and connectivity.

Mechanistic interpretation remains under discussion; we describe association, not cause.

Generous behavior engages reward-related neural circuitry.

Small-sample neuroimaging. We use it as an illustration, not as proof that service pays.

67% of reps did not expect to hit quota; 84% missed the previous year.

Vendor survey. Self-reported and subject to sampling bias.

Roughly 70% of a seller's day is spent on non-selling work.

Vendor survey, self-reported time allocation.

Average quota attainment is 62%, and 47.4% of closed-won revenue is produced by the top 10% of sellers.

Vendor benchmark drawn from platform customers; not a random sample of the market.

Flow states are associated with a specific relationship between challenge and skill.

Largely self-report and experience sampling. Useful vocabulary; weak causal machinery.

Reciprocity, social proof, and commitment reliably influence compliance in field settings.

Replication strength varies by effect. We teach these as ethical constraints, not levers to pull on people.

Polyvagal theory explains the physiology of social safety through a phylogenetically newer vagal pathway.

We do not rely on polyvagal theory as a mechanism. We cite the critique alongside the response.

Porges maintains that polyvagal theory's core premises remain supported and addresses the critiques directly.

Presented so readers can weigh both sides. Our protocols stand on breathing and sleep evidence instead.