You want predictable progress, not surprises on test day. Physical Readiness Training (PRT) is the Army’s training doctrine that builds the strength, endurance, power, mobility, and durability you need to perform in any duty position. It underpins readiness across the force and prepares you for the Army’s fitness test of record (the Army Fitness Test, or AFT, as of June 1, 2025). If you plan to ship, or you’re a serious athlete who trains like one, you should treat PRT as a system: so plan, measure, adjust, repeat. Here’s how.
What to Measure and Why
You don’t need a lab in your barracks room. You do need a small set of objective signals that reflect adaptation, fatigue, and health. The list below covers the metrics that move the needle for PRT outcomes and injury risk, with simple ways to track them and clear thresholds that warrant a professional look.
Resting Heart Rate (RHR)
How to capture: Take it right after waking, before coffee if you drink it, with a chest strap or a reliable watch.
Use: Lower RHR over months is good because it suggests aerobic gains. However, abrupt rises often signal illness or overload.
Red flags: If it’s consistently >100 bpm at rest, or you have new, unexplained spikes from your baseline across several mornings. Very low rates (<40) can be normal in trained athletes, but low rate paried with dizziness, syncope, or exercise intolerance is a sign you should get evaluated.
Heart Rate Variability (HRV)
How to capture: Morning 60–120-second reading with the same device and protocol daily.
Use: Higher HRV generally shows greater parasympathetic tone and readiness; day-to-day noise matters less than your rolling baseline. Do watch for multi-day drops paired with poor sleep, high stress, or heavy blocks.
Red flags: Sustained, unexplained suppression versus your normal, especially with fatigue, mood changes, or a performance dip. HRV has wide individual ranges; trend yourself, not a chart.
Blood Pressure (BP)
How to capture: Home cuff, seated, back supported, feet on the floor, two readings one minute apart.
Use: Know that hypertension negatively affects endurance, recovery, and long-term health.
Red flags: Stage 1 begins at ≥130/80 mmHg; stage 2 at ≥140/90 mmHg. A reading ≥180/120 demands immediate repeat; if still that high, contact a clinician now.
Run Split Trends
How to capture: Auto-lap your GPS watch at 1 km or 1 mile.
Use: Even or slight negative splits in threshold and long runs show smart pacing and aerobic capacity. Drifting splits week-to-week (especially with rising RPE) flag under-recovery or heat/terrain issues you need to plan around.
Recovery Pulse (Heart-Rate Recovery, HRR)
How to capture: After a hard interval, note HR, then stand or walk easy for 60 seconds and recheck.
Use: Faster drop over time shows improved fitness.
Red flags: A 1-minute HRR that’s very slow to fall (classically <12 bpm drop after a graded test) has been associated with higher risk in clinical settings. But context matters, so combine with symptoms and training history.
RPE-Based Training Load
How to capture: Use the session-RPE method: rate the whole session on a 0–10 scale and multiply by minutes (e.g., RPE 7 × 60 = 420 AU).
Use: Sum weekly loads and track week-to-week change. Keep jumps moderate; stack too many “7–8” days and your shins and hamstrings will tell you.
Red flags: Sudden load spikes plus rising soreness or pace decay—time to unload.
Sleep Duration (and Quality Notes)
How to capture: Log true sleep time, not time in bed.
Use: Adults need ≥7 hours most nights, period. Soldiers who protect sleep recover better, learn skills faster, and keep injury risk lower.
Red flags: Chronic <6 hours, repeated awakenings, or snoring with daytime sleepiness.
Hydration Indicators
How to capture: Morning body mass and urine color; note fluid intake on hot training days.
Use: Maintain day-to-day body mass; darker urine suggests you’re behind. Performance and safety drop with ~2% body mass loss from dehydration.
Red flags: Persistent dark urine, dizziness on standing, or >2% weight loss across a session. Replace fluids and electrolytes and adjust your plan.
Waist-to-Height Ratio (WHtR)
How to capture: Measure waist at navel, divide by height (same units).
Use: Quick screen of central adiposity tied to cardiometabolic risk, more stable than weight alone during strength phases.
Red flags: ≥0.5 merits focused nutrition and conditioning; discuss medical risk modifiers with your clinician.
Pain Flags
How to capture: Simple scale (0–10) for pain at rest and during key tasks: squats, loaded carries, and 2-mile pace.
Use: Pain that changes mechanics or persists >48 hours after deload deserves action: modify, substitute, or stop the offending drill.
Red flags: Night pain, swelling that limits range, numbness/tingling, or bone-localized tenderness—get it checked.
Periodic Labs and Cardiac Screening
How to capture: Work with a clinician for baseline and periodic checks during heavy cycles: CBC, ferritin, vitamin D, A1C if indicated, and a fasting lipid panel. Low ferritin with fatigue and declining endurance needs attention. Family history of early cardiac disease, exertional syncope or chest pain, or unexplained exercise intolerance calls for a pre-participation screen using the American Heart Association’s 14-element checklist, and, when appropriate, referral to sports medicine.
To Sum Up
Start with a minimal dashboard: RHR, HRV, sleep hours, weekly session-RPE load, and run splits. Then add BP weekly and WHtR monthly. Keep notes on pain and hydration during heat or altitude exposure. Keep in mind that patterns matter more than single data points, and simple habits beat complicated gadgets (though a reliable chest strap and cuff go a long way).
Bottom line: You train to perform; you measure to adjust. Use these metrics to steer PRT, not to obsess over every fluctuation. When the numbers and how you feel disagree, you listen to both—then you act.