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Cardio
Cardio

Running / Jogging (Cardio Modality)

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runningjogginghigh-impactvigorousmodalityweight-bearing

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A high-impact, high-intensity modality that easily reaches vigorous effort and builds endurance efficiently — but carries the most overuse-injury risk, so mileage must be progressed carefully.

Detail

Running and jogging are weight-bearing, high-impact gait activities that reach vigorous intensity readily, making them efficient for building cardiorespiratory fitness and expending energy. Jogging (~4.5 mph) ≈ 6 METs; running 6 mph (10 min/mile) ≈ 10 METs; running 8 mph (7.5 min/mile) ≈ 13.5 METs — all vigorous (see METs (Metabolic Equivalents)).

The trade-off is impact: each stride involves ground-reaction forces several times body weight, so running carries higher rates of overuse injury (shin splints, runner's knee, stress fractures, Achilles/plantar issues) than low-impact modalities. The most important safeguard is gradual mileage progression (the ~10%/week heuristic; see Progressing Cardio Training) plus appropriate footwear, surfaces, and a warm-up (see Warm-Up & Cool-Down for Cardio).

How to program.

Key facts

  • High-impact, weight-bearing; reaches vigorous intensity readily.
  • Jog ~4.5 mph ≈6 METs; run 6 mph ≈10 METs; run 8 mph ≈13.5 METs.
  • Highest overuse-injury risk among common cardio modalities.
  • Beginners: run/walk progression; progress mileage ~10%/week.
  • Program with mostly easy volume + a minority of tempo/interval work.

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Compendium of Physical Activities MET values (jog 4.5 mph ≈6; run 6 mph ≈10; run 8 mph ≈13.5). "10% rule" common heuristic.

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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.

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Atlas Connections

Progressing Cardio Training
Advance aerobic training by gradually raising one variable at a time — usually duration/frequency first, intensity later — in small increments, with the biggest early gains in the first 6–8 weeks.
Fartlek Training
"Speed play" — unstructured, continuous training where you spontaneously vary pace between easy and hard, blending continuous and interval work without fixed timing.
HIIT (High-Intensity Interval Training)
Repeated near-maximal intervals (about 80–100% of max heart rate / VO2max) with recovery between them — a time-efficient way to raise VO2max and cardiometabolic fitness.
Long Slow Distance (LSD)
Extended-duration, low-to-moderate-intensity continuous training that builds the aerobic "base" — high volume, easy pace, long time on task.
METs (Metabolic Equivalents)
A MET is the energy cost of an activity relative to sitting quietly — an absolute intensity unit used to compare activities and estimate calories burned.
Tempo / Threshold Training
Sustained "comfortably hard" work right around the lactate/ventilatory threshold — the pace you could hold for roughly an hour — to push the threshold itself higher.
Training-Intensity Distribution (Polarized / Threshold / Pyramidal)
How a week's training time is split across easy, moderate, and hard zones — the main models being polarized (mostly easy + some very hard), threshold (lots of moderate), and pyramidal (a tapering pyramid from easy to hard).
VO2max Intervals
Longish, hard intervals (around 3–5 minutes near maximal aerobic power) designed to accumulate time at or near VO2max — the most direct interval stimulus for raising maximal aerobic capacity.
Warm-Up & Cool-Down for Cardio
Begin with an easy build-up to prepare the heart, muscles, and joints, and end by tapering down gradually — never stopping abruptly — to ease the body back to rest.
Warning Signs of Under-Recovery
The early flags that recovery is losing to training stress — stalled or declining performance, persistent fatigue and soreness, poor sleep, low mood/motivation, elevated resting heart rate, and more frequent illness.