What it trains
Stair running is hard cardio for your legs. Every step is a small single-leg lift of your whole body weight, with the quads and glutes doing the main work and the calves providing the push-off. Your heart rate climbs quickly. Taking two steps at a time lengthens each stride and gives your glutes more to do, while one step at a time is quicker and closer to ordinary running. The way down is your recovery, but your thighs brake on every step, and that is often what leaves you sore the next day.
Common mistakes
- Hauling yourself up on the handrail. That takes work away from your legs. Keep a hand near the rail for safety, but let your legs do the climbing.
- Wet or slippery stairs. Rain, leaves and ice make outdoor steps slick. Choose a dry flight and shoes with good grip, or train indoors that day.
- Too many climbs the first time. It often feels fine at the time and heavy in your thighs for days after. Start with 4 to 6 climbs and build from there.
Variations and alternatives
- The stair climber gives you the same upward movement indoors, with no way down and no slippery steps.
- The chair step-up builds single-leg strength at a calmer pace before you start running stairs.
- The box jump trains explosive power with full rest between jumps, for when you want power rather than fitness.
How to plan your sessions
Run up, walk down to recover and go again. On a flight that takes 20 to 40 seconds to climb, 6 to 10 climbs is usually enough once you are used to it. Warm up with a few minutes of walking and a couple of easy climbs. Once or twice a week is plenty, ideally not the day before a heavy leg session; see how often should you train.
Time one climb and compare over the weeks. Then go faster, add climbs or take two steps at a time, but make only one change at once. That is progressive overload with the stairs as your equipment. Pain in the knees or Achilles tendons is different from burning thighs: if you feel it, stop and have a doctor or physiotherapist assess it.