HRV-Guided Training¶
HRV-Guided Training là training load management system sử dụng Heart Rate Variability (HRV) đo buổi sáng như objective indicator của CNS recovery state — thay vì dùng schedule cố định không điều chỉnh theo trạng thái thực tế của player.
"Implement HRV monitoring every morning — a five-minute measurement before rising that provides the most reliable objective indicator of CNS recovery state available without a laboratory. Let the number guide training intensity that day, not the programme schedule."
HRV Là Gì¶
Heart Rate Variability — Định Nghĩa¶
HRV đo sự biến thiên trong khoảng thời gian giữa các nhịp tim. Tim không đập đều — khoảng cách giữa hai nhịp liên tiếp dao động. HRV đo sự dao động này.
| HRV cao | HRV thấp |
|---|---|
| Autonomic nervous system trong trạng thái balanced và ready | Sympathetic dominance — stress, fatigue, under-recovery |
| CNS recovered và available for full training | CNS depleted — training will degrade, not build |
| Good heart-brain communication | Disrupted heart-brain communication |
Tại Sao HRV Là CNS Indicator¶
CNS recovery state không có visible signal (không có soreness, không có swelling). HRV là proxy indicator vì: - Autonomic nervous system (ANS) directly regulates both HRV và CNS function. - ANS state reflective of overall neural recovery. - Low HRV → ANS in sympathetic dominant state → CNS not recovered → performance will be throttled by Central Governor Model.
Morning Measurement Protocol¶
Timing Is Critical¶
Measure before rising — lying in bed, immediately after waking: - HRV is highly sensitive to position (lying vs. standing → different readings). - Measurement before any physical activity → pure baseline reading. - Any movement, stress, or food intake → confounds the reading.
Duration: 5 phút minimum recording with chest strap or validated finger sensor.
Interpretation Framework¶
| HRV vs Personal Baseline | Training Decision |
|---|---|
| ≥ +10% above baseline | Full training intensity — potential high-performance day |
| Within normal range (±5%) | Planned session proceeds normally |
| 5–10% below baseline | Reduce intensity — micro-load only, no maximum efforts |
| >10% below baseline | CNS-only day: Movement, light technical work, no loading. Do not train through this. |
Personal baseline is key: Absolute HRV numbers vary hugely between individuals. A reading of 45ms may be excellent for one player and poor for another. Track rolling 7-day average as personal baseline reference.
HRV Decision Tree In Practice¶
Morning HRV measurement
↓
Normal or above → Planned training proceeds
↓
5-10% below → Micro-load only version of session
↓
>10% below → CNS-only day
↓
Check: 2+ days consecutive low HRV?
↓
Yes → Full rest day + investigate cause (sleep, nutrition, travel, emotional stress)
Stacking HRV With Subjective "Despite" Signals¶
HRV + subjective CNS Fatigue Signs together create most complete picture:
| HRV | "Despite" signs | Assessment |
|---|---|---|
| Low | Present | Confirmed CNS Fatigue — rest |
| Normal | Present | Acute stressor — investigate |
| Low | Absent | Systemic fatigue building — monitor, reduce load |
| Normal | Absent | Train fully |
Tournament-Week Application¶
In tournament week, HRV governs every training decision: - Match day: No strength training regardless of HRV. - Day before match: If HRV normal → micro-load activation. If HRV low → rest only. - Between consecutive matches: If HRV low → only recovery work. If HRV normal → light activation.
This prevents the most common tournament-week error: maintaining normal training intensity because "I feel okay" — when HRV is already trending downward toward performance-limiting CNS Fatigue.