How a Sports Scientist Helps Runners Get Faster in 50 Days – By Running Less, Not More

 Written by 

Julien Raby

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Running faster doesnโ€™t require running longer.

That may seem counterintuitive, especially for runners used to chasing mileage. But according to sports scientist, physiotherapist, and former professional triathlete Nicklas Rossner, the key to faster, more efficient running lies not in volumeโ€”but in intensity, structure, and science-based progression.

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โ€œA lot of people think that if they just run more, theyโ€™ll naturally get faster. But thatโ€™s like saying youโ€™ll jump higher just by jumping more. It doesnโ€™t work that way,โ€ Rossner explains.

Whether youโ€™re chasing a sub-30 or a sub-15 minute 5K, Rossnerโ€™s four-step approach can help you shave minutes off your timeโ€”with less effortโ€”in just 50 days.

Hereโ€™s how.

Why Running More Wonโ€™t Make You Faster

Thereโ€™s a common myth in the running world: log more miles, get faster.

But this belief misses the mark. Without intensity or technical progression, piling on more distance often just reinforces inefficienciesโ€”and leads to injury or burnout.

โ€œRunning is a skill,โ€ Rossner says. โ€œAnd like any skill, you need to train the underlying systems that make it efficientโ€”your oxygen delivery, your muscular power, your neuromuscular coordination.โ€

Just like strength training requires progressive overload and focused reps, speed in running demands workouts that build specific adaptations.

Step 1: Do the Two Workouts That Actually Make You Faster

Train Your VOโ‚‚ Max Like a Machine

VOโ‚‚ Max is the maximum amount of oxygen your body can use during intense exercise. Think of it as your internal engine.

โ€œIf you want to run faster with less effort, your body needs to learn to use more oxygen efficiently. Thatโ€™s exactly what VOโ‚‚ Max training does,โ€ says Rossner.

VOโ‚‚ Max intervals stress your cardiovascular system to its upper limitโ€”forcing it to adapt by increasing oxygen uptake and delivery to working muscles.

How to do it:

  • Warm up for 10โ€“15 minutes, ending with 3โ€“4 short strides
  • Run 4 sets of 4 minutes at 90โ€“95% max effort
  • Rest for 3 minutes between reps
  • Progress weekly by:
    • Adding 1 rep (up to 7 total), or
    • Reducing rest by 15 seconds if reps feel too hard

The goal is to maximize your average pace without collapsing. The final rep should push you to your absolute limit.

โ€œEven after a few sessions, people notice theyโ€™re not out of breath so quickly. Thatโ€™s VOโ‚‚ Max improvement,โ€ Rossner notes.

Train Your Legs to Fire Like Springs

Fast running isnโ€™t just about the lungs. Itโ€™s about force production.

โ€œImagine your legs as springs. The stiffer and more reactive they are, the more force they produce and the less energy they waste,โ€ Rossner says.

Thatโ€™s where power and speed drills come in. These movements enhance neuromuscular efficiency, improve biomechanics, and reduce ground contact time.

Three essential power drills:

  1. Hill Sprints
    • Sprint 10โ€“12 seconds up a steep hill (โ‰ฅ3% incline)
    • Full recovery between reps (2โ€“3 minutes)
    • Do 8โ€“10 reps
    • Builds explosive strength without lifting weights
  2. Plyometric Jumps
    • Daily protocol:
      • Week 1: 5 sets of 10 seconds continuous jumps, 50 seconds rest
      • Add sets weekly, reduce rest time
    • Focus on minimal ground contact and max force
  3. Strides
    • Run 4โ€“6 x 100m strides
    • Progress from 5K pace to 1-mile pace
    • Emphasize form, relaxation, and cadence

โ€œThese drills turn inefficient runners into powerful, elastic machines,โ€ Rossner says. โ€œThat means faster speedsโ€”without feeling like youโ€™re working harder.โ€

Step 2: Build a Smart Weekly Structure

Itโ€™s not just what you doโ€”itโ€™s when and how you do it.

Rossner emphasizes that every runner needs a structured plan balancing stimulus with recovery. His 50-day framework includes five key workouts per week, with ample time for adaptation.

Sample week:

  • Monday: VOโ‚‚ Max Intervals + Plyometric Jumps
  • Tuesday: Easy run or rest
  • Wednesday: Tempo Run + Plyometric Jumps
  • Thursday: Easy run + Plyometric Jumps
  • Friday: Long run + Plyometric Jumps
  • Saturday: Rest or cross-training
  • Sunday: Speed + Power Drills + Plyometric Jumps

For beginners:
Cut volume to 3 days/week by combining the tempo + long run, and skipping Tuesday and Friday.

Advanced runners can increase volume or intensity, but the same principles applyโ€”never compromise recovery.

Want to accelerate gains? Rossner recommends adding 2 strength training sessions per week, targeting:

  • Glutes
  • Hamstrings
  • Calves
  • Core

โ€œItโ€™s not about lifting heavy. Itโ€™s about being strong enough to hold form under fatigue,โ€ he says.

Step 3: Fuel Your Speedโ€”Donโ€™t Starve It

Even the best program will stall without proper nutrition and recovery.

Carbohydrates

Your muscles run on glycogen. That fuel comes from carbs.

Eat a high-carb meal 2โ€“3 hours before key sessions. Oatmeal, bananas, and whole grains work well.

โ€œThink of carbs like premium fuel. Without them, your engine chokes,โ€ Rossner explains.

Also: Train your gut to tolerate fuel intake. Practice pre-run mealsโ€”not just before race day.

Protein

Repair and growth demand amino acids. Runners need 1.6โ€“2.2g/kg of body weight per day.

Include a protein source at every mealโ€”chicken, Greek yogurt, tofu, eggs.

Fats

Healthy fats support hormone function and reduce inflammation. Avocados, olive oil, and nuts are solid staples.

Hydration

A 2% drop in hydration = significant performance loss. Donโ€™t wait until youโ€™re thirsty.

Drink water steadily throughout the dayโ€”not just pre-run.

Recovery & Sleep

โ€œYou donโ€™t get faster when you train. You get faster when you recover,โ€ Rossner says.

  • Sleep 7โ€“9 hours nightly. Thatโ€™s when muscles rebuild and adaptations lock in.
  • Use active recovery like stretching, mobility work, or light jogging on easy days.
  • Take full rest days. No ego runs. No half-effort miles.

Step 4: Use Supplements (If You Want the Extra 3%)

Supplements wonโ€™t replace smart trainingโ€”but the right ones can provide a small edge when everything else is dialed in.

Caffeine

  • Take 30โ€“60 minutes before hard workouts or races
  • Increases perceived energy, reduces fatigue, and improves endurance
  • Tolerance mattersโ€”donโ€™t overuse it

Creatine

  • Supports short bursts of power (e.g. hill sprints, strides)
  • No, it wonโ€™t bulk you up
  • 3โ€“5g/day is enough

Beta-Alanine

  • Reduces lactic acid buildup
  • Useful for VOโ‚‚ Max runs and high-intensity sessions

โ€œI donโ€™t push supplements on anyone. But if you want that final 3% on race day, these three can actually help,โ€ Rossner adds.

Track Progress the Right Way

Forget obsessing over pace alone. Weather, sleep, hydration, and dozens of other factors impact daily splits.

โ€œYou might run slower one dayโ€”but that doesnโ€™t mean youโ€™re not improving,โ€ says Rossner.

Instead, monitor metrics that reflect true physiological progress.

1. Time Trials

  • Run a 1-mile or 5K at maximum effort every 3โ€“4 weeks
  • Compare finish times

2. Heart Rate at Pace

  • Track your heart rate during runs
  • If HR is lower at the same pace, thatโ€™s improved efficiency

3. Cadence and Stride Length

  • Speed = stride length x cadence
  • Improvements in either = faster running with less energy wasted

Ready to Run Faster with Less Effort? Do This

If you want to improve your speed and endurance in just 50 days, Rossner’s advice is simple:

  • Train for speed, not just mileage
  • Use VOโ‚‚ Max intervals and power drills
  • Structure your week with recovery in mind
  • Eat to fuel, sleep to grow
  • Use supplements strategically, if desired
  • Track progress based on real metricsโ€”not just your watch

โ€œThis isnโ€™t about talent or genetics,โ€ Rossner says. โ€œItโ€™s about training the right way. If you follow the plan, the speed comesโ€”faster than most people think.โ€

Looking to avoid the biggest mistakes that keep runners stuck? Start by not skipping rest days, not running every workout at the same pace, and not ignoring recovery. Those changes alone might unlock your next PR.

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