Cardiovascular fitness — running, cycling, swimming, HIIT, and heart health news.
8 Treadmill Workouts Pro Runners Swear By for Better Performance
# 8 Treadmill Workouts Pro Runners Use to Build Performance Professional runners treat the treadmill as more than a weather backup. They weaponize it…
This 83-Year-Old Has Finished Every 5-Borough NYC Marathon. He Has No Plans to Stop Running.
Dave Obelkevich has completed 49 consecutive New York City Marathons and shows no signs of slowing down at 83 years old. The veteran runner plans to t…
6 Lactate Threshold Workouts to Build Speed Endurance and Race-Day Confidence
# 6 Lactate Threshold Workouts to Build Speed Endurance and Race-Day Confidence Lactate threshold training stands as one of the most effective method…
A Coach to Pro Marathoners Convinced Me of the Benefits of Double Threshold Workouts. Here’s What Happened When I Tried Them.
# Double Threshold Workouts: A Runner's Experiment A Runner's World contributor tested double threshold workouts, a training method coached by profes…
<b><strong>Kayak, Trek, and Paddleboard Away Stress at This Eco-Retreat in Costa Rica</strong></b>
Playa Cativo, an eco-retreat located on the Osa Peninsula in Costa Rica, offers stress-relief activities centered on water-based recreation and wildli…
Is Running Outside Better Than the Treadmill? Here’s What the Research Says
# Is Running Outside Better Than the Treadmill? Here's What the Research Says The treadmill vs. outdoor running debate has divided runners for decade…
The 10 Best Running Hydration Vests and Packs of 2026, Tested by Runners
# Hydration Vests and Packs Transform Long-Distance Running Running hydration systems have become essential gear for endurance athletes tackling dist…
The Magic of the 30-Second Walk Interval
# The Magic of the 30-Second Walk Interval Run/walk training, popularized by ultramarathoner Jeff Galloway in the 1970s, hinges on a deceptively simp…
The 7 Best Under-Desk Treadmills, Tested and Reviewed by Fitness Editors
# The 7 Best Under-Desk Treadmills: A Tested Guide to Moving While You Work Sedentary desk jobs kill progress. Workers spend eight hours sitting, whi…
Having Trouble Staying in Zone 2? Here’s What Experts Say to Do
# Zone 2 Training Isn't About Your Watch. Here's How to Find Your Real Easy Pace Most runners rely on heart rate zones from their smartwatch to guide…
Your Hard Workout Won’t Make You Fitter Tomorrow. Here’s How Long It Actually Takes to Get Faster.
# How Long It Really Takes to Build Running Fitness The runner who crushes a hard workout on Tuesday expects to feel faster by Wednesday. The reality…
Why Your Long Runs Feel So Hard—and How to Fix Them
# Why Your Long Runs Feel So Hard—and How to Fix Them Most runners attack their long runs with the same mentality they bring to tempo work or interva…
Long Runs Are Key to Endurance Gains, But Here’s Why You Need More Weekly Mileage
# Long Runs Build Endurance, But Weekly Volume Is Where Real Fitness Happens The long run captures runner attention. Every weekend, thousands lace up…
Yoga and Overweight: Health Benefits and Tips for Getting Started
Yoga offers measurable benefits for weight management in people carrying extra weight, combining physical conditioning with mental health gains that a…
This Wearable Data Reveals the Training Strategies That Improve VO2 Max the Most
# Wearable Data Shows Which Workouts Deliver the Biggest VO2 Max Gains Runners hunting for VO2 max improvement have long debated the best training ap…
Not Drinking Enough Water During Lengthy Cardio? These 10 Hydration Packs Are Your Answer.
# Hydration Packs Solve the Real Problem: Dehydration During Endurance Exercise Dehydration during long cardio sessions kills performance. Your heart…
The Right Run/Walk Pace Can Help You Go Farther With Less Fatigue. Here’s How to Find Yours.
# The Right Run/Walk Pace Cuts Fatigue and Extends Distance Run/walk interval training works. The strategy of alternating running and walking segment…
Are You Running Too Slow on Long Runs?
# Are You Running Too Slow on Long Runs? The conventional wisdom in distance running holds firm: long runs happen at an easy, conversational pace. Bu…
Looking to Boost Your VO2 Max at 50+? Experts Explain the Training Changes You Need to Get Faster in Later Years
# Training for VO2 Max After 50: What the Science Actually Shows Aerobic capacity declines roughly 10% per decade after age 25, a process called VO2 …
How to Build Your Speed Endurance So You Crush the Final Miles of a Race
# How to Build Speed Endurance to Finish Strong in Any Race Speed endurance represents your ability to maintain a faster pace during the final miles …