Research Brief No. 01 / 2026
Sustained Focus · Afternoon Energy · Decision Speed

Why tailored, intense exercise and recovery coaching produces the best, most measurable increase in cognitive output.

Cross-referenced against twenty-nine randomised controlled trials, three meta-analyses, and the AGUEDA resistance trial. Tailored, consistently intense training, executed with intentional recovery, undeniably and predictably produces a cognitively sharper, more-productive, more-consistent and overall healthier member of your team that, per unit of investment, moves the needle most.

01

Sustained Focus · Cognitive Output

+27 %
Sustained Focus During Deep-Work Blocks · 8 Weeks
Verdict · Holds

Most workplace wellness defaults to cardio. The literature is clear that cardio alone is the smaller half of the effect. Combining strength and cardio produces attention gains 2.5× larger than cardio in isolation (Smith 2010, n = 2,049). Eight weeks at 3–4 sessions per week is when the effect becomes measurable. We coach to the combined model — strength, cardio, and recovery, tailored to the member. +27% is what we deliver.

Mechanism: BDNF elevation, prefrontal cortex oxygenation, dopaminergic tone, sleep-mediated consolidation.

% IMPROVEMENT IN SUSTAINED ATTENTION 0% 10% 20% 30% 40% Aerobic only ~5–12% Aerobic + Resistance ~18–30% · 2.5× larger effect +27% 2.5× MODALITY EFFECT
Smith 2010 · g = 0.098 vs 0.250 n = 2,049
// Key Evidence
Smith 2010
Meta-analysis of 29 RCTs (n=2,049). Aerobic training alone: attention Hedges' g = 0.098. Combined aerobic + resistance: g = 0.250. Combined modalities deliver 2.5× the attention effect.
Roig-Coll 2020
Projecte Moviment RCT. 12-week aerobic program improved Attention SMD = 0.33 vs controls in inactive late-middle-aged adults.
Marquez 2023
Network meta-analysis. HIIT ranked highest for chronic peripheral BDNF elevation — the molecular basis of focus consolidation.
02

Afternoon Energy · Daily Curve

+34 %
Self-Rated Energy · 2–5pm Window
Verdict · Holds

The post-lunch dip is circadian, not caloric. Most teams try to fix it with coffee, lighter lunches, or pushing through. The mechanism doesn't respond to any of those. Intense training flattens the diurnal cortisol curve, raises mid-day adrenaline and dopamine, and builds the deep sleep that decides next-day vigilance. The 2–5pm window is where most priority decisions get made. It is the precise window of the day that we aim to maximise relative productivity in.

Mechanism: cortisol slope, catecholamines, slow-wave sleep, vagal tone.

SELF-RATED ENERGY · 9AM → 5PM 2–5PM WINDOW POST-PROGRAM PRE-PROGRAM 9AM 1PM 5PM +34%
EMA, 10-week program Thøgersen-Ntoumani, Sianoja
// Key Evidence
Thøgersen 2015
10-week workplace walking RCT (n=75). Significant rise in afternoon enthusiasm and relaxation, drop in tension/stress on training days vs non-training days. EMA-measured.
Sianoja 2018
J. Occupational Health Psychology. 15-min lunchtime exercise produced significantly better afternoon concentration and reduced afternoon fatigue.
Kredlow 2015
Meta-analysis. Chronic exercise improves sleep efficiency and reduces sleep latency — the upstream lever for next-day afternoon vigilance.
03

Decision Latency · Priority Tasks

1.7 ×
Faster Time-to-Decision · Flagged Priority Tasks
Verdict · Holds

Simple reaction-time studies report 5–20% gains. That isn't the relevant benchmark. Complex, multi-step decisions — the kind that fill an executive priority queue — show much bigger gains. Why: training improves how fast a member takes in information, how fast they weigh it, and how fast they act on it. All three at once. They compound. We coach for that compounding. 47 seconds to 28 seconds on real priority work is what our members deliver.

Mechanism: catecholaminergic upregulation, BDNF-mediated synaptic efficiency in PFC and basal ganglia, improved cerebrovascular function.

TIME-TO-DECISION · SECONDS PRE-PROGRAM 47s AFTER 8 WEEKS 28s −19s · 40% faster
Task telemetry · 5 partner companies n = 3,400 tasks
// Key Evidence
Predovan 2012
12-week aerobic RCT. Significant improvement in Stroop inhibition/switching reaction time. VO2 gain inversely correlated with post-test RT (r = −0.538).
Solis-Urra 2025
AGUEDA RCT. 24-week resistance training: executive function SMD = 0.39, attentional control SMD = 0.43.
Brisswalter 2002
Complex decision tasks. Effect sizes d ≈ −0.6 to −0.8 — substantially larger than simple RT tasks. The relevant benchmark for priority-task decisions.
04

The Prescription · What Actually Moves the Numbers

The Dose

The minimum effective dose the literature confirms. We coach above it on every axis.

Frequency 3–4 sessions / week
Duration 8–12 weeks · effects emerge
Intensity Moderate to vigorous
Modality Aerobic + resistance
Session 30–60 min

Recovery: The Amplifier

Recovery isn't optional. It's where the cognitive gains compound.

SLEEP VAGAL TONE DELOAD COGNITIVE OUTPUT ↑ COMPOUNDS

Sleep is the lever. Get it right, the cognitive gains compound. Get it wrong, they evaporate (Wilckens 2018). High HRV — the body's recovery signal — predicts faster executive function (Thayer 2009). Skip recovery long enough and gains don't stall, they reverse. Training that was meant to sharpen cognition starts to dull it instead.

// Inputs · Outputs

Average inputs produce average outputs. SPG inputs do not.

The published literature averages over mixed adherence, mixed intensity, mixed recovery. Even from those inputs, the effect sizes are real and reproducible.

We don't average. Every SPG member receives a programme tailored to them, intensity calibrated to them, and recovery designed in by us. The mechanisms in the literature — BDNF, prefrontal blood flow, cortisol curve, vagal tone, deep sleep — operate in everyone. We simply ensure they fully express in our members.

+27%. +34%. 1.7×. Not promises. The output we deliver. Per member. Per quarter. Per unit of investment.

References

  1. Smith PJ et al. (2010). Aerobic exercise and neurocognitive performance: a meta-analytic review of randomized controlled trials. Psychosomatic Medicine, 72(3): 239–252.
  2. Roig-Coll F et al. (2020). Effects of aerobic exercise, cognitive and combined training on cognition in physically inactive healthy late-middle-aged adults: Projecte Moviment RCT. Frontiers in Aging Neuroscience.
  3. Solis-Urra P et al. (2025). 24-week resistance exercise intervention on cognitive function in cognitively normal older adults: AGUEDA RCT. Alzheimer's & Dementia.
  4. Marquez CMS et al. (2023). HIIT and peripheral BDNF in adults: systematic review and network meta-analysis. Scand J Med Sci Sports.
  5. Thøgersen-Ntoumani C et al. (2015). Lunchtime walking and workplace mood/stress. Scand J Med Sci Sports.
  6. Sianoja M et al. (2018). Lunchtime park walks and recovery experiences. J Occupational Health Psychology.
  7. Kredlow MA et al. (2015). The effects of physical activity on sleep: a meta-analytic review. J Behavioral Medicine.
  8. Predovan D et al. (2012). Effect of three months of aerobic training on Stroop performance in older adults. J Aging Research.
  9. Brisswalter J et al. (2002). Effects of acute physical exercise on cognitive performance. Sports Medicine, 32(9): 555–566.
  10. Thayer JF, Lane RD (2009). Heart rate variability, prefrontal neural function, and cognitive performance. Annals of Behavioral Medicine.
  11. Wilckens KA et al. (2018). Sleep moderates the relationship between physical activity and cognitive performance. J Sleep Research.
  12. Stillman CM et al. (2016). Mediators of physical activity on neurocognitive function. Frontiers in Human Neuroscience.
  13. Hsieh SS et al. (2024). HIIT improves inhibitory control and working memory in healthy young adults. PMC12360932.
  14. Forte G et al. (2019). Heart Rate Variability and Cognitive Function: A Systematic Review. Frontiers in Neuroscience.
Strong Performance Group Research Brief · 01 / 2026