Training & recovery
ACWRAcute : Chronic Workload Ratio — 7-day load vs 28-day; 0.8–1.3 is the sweet spot.
HRVHeart Rate Variability — beat-to-beat variation; higher usually means better recovered.
RHRResting Heart Rate.
BBBody Battery — Garmin's 0–100 energy estimate.
VO₂maxMaximal oxygen uptake — the best-validated aerobic-fitness & healthspan marker.
RPERate of Perceived Exertion — how hard a session felt, 1–10.
Z1–Z5Heart-rate training zones, from easiest (Z1) to maximal (Z5).
Zone 2Easy aerobic effort you can still hold a conversation in.
ReadinessGarmin Training Readiness score, 0–100.
LoadSession training load (Garmin's EPOC-based effort measure).
Bloodwork & body composition
SHBGSex Hormone-Binding Globulin — binds testosterone; lower = more usable T.
Total TTotal testosterone (bound + free).
Bioavail. TTestosterone not bound to SHBG — the usable fraction.
LHLuteinizing Hormone — signals the testes to make testosterone.
FSHFollicle-Stimulating Hormone.
CKCreatine Kinase — a muscle-damage / training-load marker.
ALTAlanine aminotransferase — a liver enzyme.
eGFRestimated Glomerular Filtration Rate — kidney function.
TSHThyroid-Stimulating Hormone.
HbA1c3-month average blood sugar.
CBCComplete Blood Count.
DEXADual-energy X-ray Absorptiometry — body-composition & bone scan.
RSMIRelative Skeletal Muscle Index — muscle mass ÷ height².
RMRResting Metabolic Rate.
VATVisceral Adipose Tissue — fat around the organs.
Supplements
D3Vitamin D3 (cholecalciferol).
K2 / MK-7Vitamin K2 (menaquinone-7).
EPAEicosapentaenoic acid — an omega-3.
DHADocosahexaenoic acid — an omega-3.
TMGTrimethylglycine (betaine) — methylation support.
KSM-66A standardized ashwagandha root extract.
LMNTAn electrolyte drink mix (sodium / potassium / magnesium).
Races & general
WTWilderness Traverse — your Sept 2026 expedition adventure race.
ARAdventure Racing.
MTBMountain bike.
Medicine 3.0Peter Attia's proactive, longevity-first approach to health.
PWAProgressive Web App — this installable web app.
